Arroyo Grande City Council
August 25, 2026

\\GSICLOUD\Projects\672-Northern Cities Management Area\_Grapher Figures\Annual Rpt Figs Fig 5 NCMA Precip 1950 - present Shaded 1950
1955
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1965
1970
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Calendar Year
80706050403020100-10-20
Cumulative Departure from Average, Inches
0 5040302010
Annual Precipitation, Inches
Drought
Drought
Average Precipitation 1950-2025: 15.6 Inches
Wet Period Alternating Wet and Dry Years
Wet Period
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FIGURE 5. ANNUAL PRECIPITATION 1950 TO 2025
Northern Cities Management Area
San Luis Obispo County, California

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Pismo Beach
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Oceano
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Nipomo
(CIMIS 202)
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Date: January 16, 2019
LEGEND
&< Active Weather Station
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Nipomo Mesa Management Area
Northern Cities Management Area
Santa Maria Valley Management Area
Location of Precipitation Stations
FIGURE 
Northern Cities Management Area
San Luis Obispo County, California
Document Path: Y:\0672_Northern_Cities_Management_Area\Source_Figures\005_2018_Annual_Report\Figure_4_NCMA_Precipitation_Statio o n_Locations.mxd
01 Miles
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San Luis Obispo County, California Page 156 of 302
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Figure 5 illustrates annual rainfall and shows several multi-year drought cycles (e.g., 6 years, 1984 through 1990) followed by cycles of above-average rainfall (e.g., 7 years, 1991 through 1998). Except for 2010, the period from 2007 through 2015 (8 years) experienced below-average annual rainfall, indicating a dry hydrologic period. This pattern continued into late 2016 when the hydrologic pattern appeared to have broken the serious drought that the area (and state) had experienced for the previous 5 years. Annual rainfall totals between 2016 and 2019 were normal fluctuations between wet and dry years. However, between 2019 and 2022, there was a return to drought conditions. The above-average rainfall received in 2023 and the nearaverage rainfall received in 2024 and 2025 have resulted in a return to normal conditions, as illustrated in Figure 5.

2.3 Evapotranspiration
CIMIS maintains weather stations in locations throughout the state to provide real-time wind speed, humidity, and evapotranspiration data. The nearest CIMIS station to the NCMA is the Nipomo station (see Figure 6). The Nipomo station has gathered data since 2006. While this station may have been subject to irrigation overspray in recent years (noted in Section 2.2), this does not have a significant impact on the measurements used for calculating ET. The monthly ET data for the Nipomo station are shown in Figure 7 for 2025 and average conditions (over 10 years). The ET rate affects the recharge potential of rainfall and the amount of outdoor water use (irrigation).

2.4 Geology and Hydrogeology
The current understanding of the geologic framework and hydrogeologic setting is based on numerous previous investigations, particularly Woodring and Bramlette (1950), Worts (1951), Miller and Evenson (1966), DWR (1970, 1979, and 2002), Fugro (2015), Geoscience Support Services (2019 and 2021), and Ramboll (2022).

The NCMA overlies the northwest portion of the SMRVGB. There are two principal aquifers in the NCMA portion of the SMRVGB. Groundwater pumped from the sedimentary deposits that make up the main municipal production aquifer underlying the NCMA is derived from the Paso Robles Formation14 and the underlying Careaga Sand.15 The Paso Robles Formation and Careaga Sand aquifers together are referred to as the deep aquifer system in this report. All municipal pumping in the NCMA occurs on the Tri-Cities Mesa and is produced from the deep aquifer.

The second principal aquifer is the alluvial aquifer, consisting of Quaternary-age alluvial sediments of Arroyo Grande Creek, Los Berros Creek, and the Cienega Valley. Most agricultural groundwater production in the Cienega Valley is presumed to be extracted from a lower, confined to semi-confined portion of the alluvial aquifer (DWR, 1970).

Several faults either cross or form the boundary of the NCMA, as identified by DWR (2002), Pacific Gas & Electric (PG&E) (PG&E, 2014), and others. The Oceano Fault (USGS, 2006) trends northwest-southeast across the central portion of NCMA and has been extensively studied by PG&E (2014). Offshore, the Oceano Fault 14 The Plio-Pleistocene-age Paso Robles Formation aquifer consists of unconsolidated deposits ranging from fine to coarse sand and gravel, silty to clayey sand and gravel, and fine to medium silty sand. Regionally, the formation is compartmentalized into two to five aquifers zones designated from top to bottom as the A to E Zones. These aquifer zones are separated by silt and clay confining beds near the coast and are generally merged inland (DWR, 1970). 15 The Pliocene-age Careaga Sand consists of unconsolidated to well-cemented calcareous coarse sand with gravel, fine to medium sand, and silty sand. The Careaga Sand is of marine origin (DWR, 1970).

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connects with the Hosgri and Shoreline fault systems several miles west of the coast. Onshore, the Oceano Fault consists of two mapped fault splays, including the main trace of the Oceano Fault as well as the Santa Maria River Fault, which diverges northward of the Oceano Fault through the Cienega Valley before trending into and across the Nipomo Mesa.

It is unknown the extent to which the Oceano and Santa Maria River faults impede groundwater flow within the deep aquifer system materials. However, movement on the faults, as mapped by PG&E (2014), may suggest a possible impediment to flow within the Careaga Sand and possibly the Paso Robles Formation.

PG&E (2014) suggests that the existence of the Santa Maria River Fault is “uncertain.” However, the water elevation contour maps of the NCMA (Figure 8 and Figure 9) (discussed in more detail in Section 3.1.1) may suggest that the Santa Maria River Fault plays a potential, but unknown, role in groundwater flow across the NCMA.

The Wilmar Avenue Fault generally forms the northern boundary of the NCMA, apparently acting as a barrier to groundwater flow from the older consolidated materials north of the fault southward into the SMRVGB.

There is no evidence, however, that the Wilmar Avenue Fault impedes alluvial flow in the Pismo Creek, Meadow Creek, or Arroyo Grande Creek alluvial valleys.

2.5 Groundwater Flow and Recharge
The groundwater system of the NCMA has several sources of recharge, including precipitation, agricultural return flow, infiltration of stream flow, and subsurface inflow from adjacent areas. Precipitation-driven recharge is enhanced by several stormwater retention ponds in NCMA.16 According to the DWR Bulletin 63-3 report (DWR, 1970), both the Paso Robles Formation aquifer and the lower confined portion of the Cienega Valley alluvial aquifer are recharged primarily from subsurface groundwater inflow from the east, where the overlying confining layers are thin to nonexistent (DWR, 1970). These recharge areas to the east include inland reaches of Arroyo Grande Valley and portions of Nipomo Mesa (DWR, 1970). Groundwater quality data presented in DWR Bulletin 63-3 (DWR, 1970) and corroborated with data available through the Central Coast Regional Water Quality Control Board Irrigated Lands Regulatory Program show evidence of recharge to the alluvial aquifer of the Cienega Valley from the Paso Robles Formation aquifer on the Nipomo Mesa. However, this recharge mechanism may be decreasing because of declining water levels on the Nipomo Mesa, as documented in recent NMMA annual reports (see Section 6.1.1).

The deep aquifer system is also recharged to a lesser extent by the percolation of direct precipitation and agricultural return flow on the Tri-Cities Mesa (DWR, 1970). In addition, some return flows occur from imported surface supply sources, including Lopez Lake and the California State Water Project (SWP). Discharge in the region is dominated by groundwater production from pumping wells and minor discharge through phreatophyte17 consumption. Historically, hydraulic gradients show that subsurface outflow discharge occurs westward from the groundwater basin to the ocean, as indicated by historical groundwater elevations observed in wells throughout the NCMA. This subsurface outflow is an important control to limit the potential of seawater intrusion. This westward gradient and direction of groundwater flow are still prevalent throughout the northern 16 Within their jurisdictions, Arroyo Grande and Grover Beach each maintain stormwater retention ponds; the SLOFCWCD maintains the stormwater system, including retention ponds, in OCSD. These ponds collect stormwater runoff, allowing the runoff to recharge the underlying aquifers. 17 A phreatophyte is a deep-rooted plant that obtains a significant portion of the water that it needs from the water table.

Phreatophytes are plants that are supplied with surface water or the upper portion of the near-surface water table and often have their roots constantly in touch with moisture.

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portion of NCMA, although there is evidence that the westward gradient may have reversed in recent years in the area south of Cienega Valley.

The following descriptions of the boundary conditions of the NCMA are derived primarily from Todd (2007).

The eastern boundary coincides with the SLOFCWCD Zone 3 management boundary and with the northwestern boundary of the NMMA. Aquifer materials of similar formation, provenance, and characteristics are present across most of this boundary, which allows subsurface flow to occur between the NCMA and NMMA.

The northern and northwestern boundary, established by the Court during the 2005 Stipulation, is coincident with the Wilmar Avenue Fault, which is located approximately along Highway 101 from Pismo Creek to the southeastern edge of the Arroyo Grande Valley. There is likely insignificant subsurface flow from the consolidated materials (primarily Pismo Formation) north of the Wilmar Avenue Fault across the boundary into the NCMA; however, basin inflow occurs within the underflow associated with alluvial valleys of Arroyo Grande and Pismo creeks.

The southern boundary of the NCMA is an east-west line, roughly located along the trend of Black Lake Canyon and perpendicular to the coastline. Historically, it appears that groundwater flow is typically roughly parallel to the boundary. This suggests that little to no subsurface inflow occurs across this boundary.

The western boundary of the NCMA follows the coastline from Pismo Creek in the north to Black Lake Canyon.

Given the generally westward groundwater gradient in the area, this boundary is the site of subsurface outflow and is a primary impediment to seawater intrusion. However, the boundary is susceptible to seawater intrusion if groundwater elevations onshore decline.

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SECTION 3: Groundwater Conditions

3.1 Groundwater Levels
Groundwater elevation data are gathered from the network of wells throughout the NCMA to monitor the effects of groundwater use and recharge, and to monitor the threat of seawater intrusion. Over time, analysis of these groundwater elevation data has included the development of groundwater elevation contour maps, hydrographs, and an evaluation of key sentry well water elevations. The historical groundwater elevation data are provided in Appendix A.

3.1.1 Groundwater Level Contour Maps
Contoured groundwater elevations for the spring (April 2025) and fall (October 2025) monitoring events are presented in Figure 8 and Figure 9, respectively. From an increased understanding of the groundwater basin aquifer system and to be consistent with recent work completed for the Phase 1B model, the groundwater elevation analysis was performed separately for each of the two principal aquifers. As described earlier (see Section 2.4), the two principal aquifers are the deep aquifer (consisting of the Paso Robles Formation and the Careaga Sand) from which all municipal production is pumped, and the alluvial aquifer within the Cienega Valley, from which most agricultural production is pumped.

Groundwater level contours for spring 2025 are presented in Figure 8. Spring groundwater elevation contours in the deep aquifer system north of the Santa Maria River Fault (displayed using blue lines) generally show a westerly to southwesterly groundwater flow. During recent drought conditions (2020), it has been observed that the groundwater elevation contours at the southeast NCMA/NMMA boundary indicate a landward groundwater gradient toward NMMA as a result of a groundwater pumping depression (see Section 6). The groundwater gradient and flow in the deep aquifer system in the southern portion of the NCMA are generally inferred based on historical records, historical trends, and water level data from wells located in the NMMA to the east. There are a limited number of wells in the southernmost portion of the NCMA, which is dominated by sensitive-species dunes and California State Parks land. April 2025 groundwater elevations in the deep aquifer system main production zone along the coast ranged from 10.8 to 16.6 feet (NAVD 88). Pumping effects are noted in the areas of concentrated municipal pumping on Tri-Cities Mesa.

Spring groundwater contours in the alluvial aquifer (displayed using yellow lines) exhibit a gradient and flow direction that generally follows the alignment of Arroyo Grande Creek (Figure 8). The groundwater contours also indicate a groundwater depression in the southeast near the Santa Maria River Fault, which has been observed historically during periods of below-average precipitation.

Groundwater elevation contours for fall 2025 are presented in Figure 9. Fall groundwater contours in the deep aquifer system north of the Santa Maria River Fault show a generally west-to-southwesterly groundwater flow, similar to conditions in the spring. Some minor pumping effects are evident in the area of the municipal wells.

Groundwater elevations in the fall are generally lower than observed in the spring due to dry summer through fall conditions and seasonal irrigation. Consequently, groundwater contour irregularities identified in the spring generally become exaggerated in the fall, including the conditions at the southeast NCMA/NMMA boundary.

Fall 2025 groundwater elevations in the deep aquifer system main production zone along the coast ranged from 10.4 to 13.4 feet (NAVD 88).

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Similar to spring, fall groundwater contours in the alluvial aquifer exhibit a gradient and flow direction that generally follows the alignment of Arroyo Grande Creek (Figure 9). The groundwater contours also indicate a lowering of groundwater levels due to seasonal agricultural groundwater production and a more pronounced groundwater depression in the southeast near the Santa Maria River Fault. The spring alluvial groundwater elevations in the Cienega Valley range up to more than 30 feet (NAVD 88) in the upper Cienega Valley, while the fall water levels in this area only extend up to about 20 feet.18 18 Note that 0.0 feet (NAVD 88) is 2.72 feet lower than mean sea level (MSL) and is 0.08 feet above the mean lower low water (MLLW) (which can be thought of as the average height of the lowest tides), as recorded at the Port San Luis tide station datum (https://tidesandcurrents.noaa.gov/datums.html?id=9412110).

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3.1.2 Historical Water Level Trends
Hydrographs of five wells in the NCMA monitoring network are presented in Figure 10. Two of the wells are completed in the deep aquifer system (32D03 and 32D11), and three of the wells are completed in the alluvial aquifer within the Cienega Valley (28K02, 30K03, and 33K03). As of fall 2024, 33K03 has been destroyed.

The hydrographs for wells 32D03 and 32D11 (Figure 10) are paired hydrographs for deep aquifer system wells in the vicinity of the municipal wellfields. Depending on the duration of pumping of the municipal wells, water levels in these wells historically have been below the levels of wells in other areas of the NCMA for prolonged periods. The hydrographs show that, historically, groundwater elevations in these wells generally have been above 0.0 feet NAVD 88. From 2007 to 2009, an area of lower groundwater elevations (a trough) beneath the active wellfield appeared. Groundwater pumping was at its peak from 2007 to 2009 (in comparison with the pumping of the last 15 years) and contributed to the apparent seawater intrusion event in the coastal wells in 2009.

As illustrated in Figure 10, the water elevations of all the wells, including the paired deep aquifer system wells 32D03 and 32D11, exhibited a steady decline from 2011 to 2016, during which time rainfall was below normal every year. In this period, groundwater elevations declined to near 0.0 feet NAVD 88 or, in the case of alluvial aquifer well 33K03, to below 0.0 feet NAVD 88. By October 2016, the groundwater elevations in these wells were generally below the levels observed in 2009–2010.

In 2016 and 2017, these five wells each exhibited an overall increase in water levels (with the exception of the normal, seasonal decline during the summer), generally reaching similar water levels as observed in 2011.

In 2017, water levels returned to a generally declining trend in all the wells. This trend continued through 2022, until 2023, when water levels rebounded rapidly in response to the wet winter of 2022/2023. In 2024 and 2025, water levels remain generally stable; however, 2025 water levels declined slightly compared to 2024, likely due to reduced precipitation and resulting increased regional groundwater pumping.

3.1.3 Sentry Wells and the Deep Well Index
Regular monitoring of water elevations in clustered sentry wells located along the coast is an essential tool for tracking groundwater elevation changes at the coast. Groundwater elevations in these wells are monitored quarterly as part of the sentry well monitoring program. As shown by the hydrographs for the five sentry well clusters (Figure 11), the sentry wells provide a long period of record of groundwater elevations.

1990 1995 2000 2005 2010 2015 2020 2025 2030 2035
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0 605040302010
\\GSICLOUD\Projects\672-Northern Cities Management Area\_Grapher Figures\Annual Rpt Figs Fig 10 NCMA Selected Hydrographs Well 32D03
Well 32D11
Water Elevation, feet NAVD88
32D03 and 32D11
28K02
30K03
33K03
Notes:NAVD88 - North American Vertical Datum of 1988
Well
Destroyed
FIGURE 10. SELECTED HYDROGRAPHS
Northern Cities Management Area
San Luis Obispo County, California

FIGURE 11. SENTRY WELL HYDROGRAPHS
Northern Cities Management Area
San Luis Obispo County, California
1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 50 201510
50 201510
50 201510
50 201510
\\GSICLOUD\Projects\672-Northern Cities Management Area\_Grapher Figures\Annual Rpt Figs Fig 11 NCMA Sentry Well Hydrographs Well 24B03Well 24B02
Water Elevation, feet NAVD88
North Beach Campground
Highway 1
Pier Avenue
Oceano Dunes
Well 30F03
Well 30F02
Well 30N02
Well 30N03
Well 36L02
Well 36L01
Flowing Artesian
Flowing Artesian
Flowing Artesian
Notes:NAVD88 - North American Vertical Datum of 1988

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Review of recent data shown in Figure 11, compared with the historical record, indicate the following notable trends:
ƒ From 2013 until near the end of 2016, the water level trend of well 30N02 (Pier Avenue)—one of the wells that experienced elevated total dissolved solids (TDS) and chloride levels (i.e., water quality degradation) in 2009–2010—looked similar to the water level trend of the well in 2007–2010, immediately before and during the period of incipient seawater intrusion. Then, between 2016 and 2020, the downward trend reversed with water elevations seasonally fluctuating around 8 feet (NAVD 88). In 2021, water elevations again began trending downward, reaching a maximum depth in fall 2022 at levels similar to the two previous low points before rising rapidly in 2023. Water elevations continued to increase in 2024 and remained generally stable during 2025. A slight decline in water level elevation occurred in the fall and winter months of 2025.
ƒ Groundwater levels declined from 2005 to 2016 in the Oceano Dunes wells (36L01 and 36L02), particularly in well 36L01, which is screened across the Paso Robles Formation. Between the end of 2016 and continuing through 2020, both wells had recovered to higher levels. Similar to well 30N02, water elevations in the Oceano Dunes wells returned to a downward trend until both wells reached historically low water elevations in fall 2022. Since fall 2022, water levels have rebounded rapidly in response to the wet winter of 2022/2023. Water elevations continued to increase in 2024 and remained generally stable during 2025.

The deepest wells in the clusters, 24B03, 30F03, and 30N02, were previously identified as critical wells to monitor for potential seawater intrusion and are included to reflect the net effect of changing groundwater recharge and discharge conditions in the primary production zone of the deep aquifer system. One of the thresholds to track the status and apparent health of the aquifer is to average the groundwater elevations from these three deep sentry wells to generate a single, representative index, called the Deep Well Index (DWI).

Previous studies suggested a consistent DWI value of 7.5 feet (NAVD 88) as a minimum threshold below which the aquifer is at risk for eastward migration of seawater and a subsequent threat of seawater intrusion. The historical variation of the DWI is presented in Figure 12. Figure 12 also displays the historical episode of incipient seawater intrusion in well 30N02, when a series of chloride concentrations higher than the previous historical baseline was observed coincident with the period of six successive quarters with a DWI less than

7.5 feet.

The DWI in 2008–2009, before the period of water quality degradation in wells 30N03 and 30N02, dropped below the 7.5-foot threshold and remained below that level for almost 2 years. Since the start of the drought in 2011, the DWI dropped below the threshold several times, but usually for only a few months at a time.

At the beginning of 2025, the DWI was above the trigger value with an index value of 12.2 feet in January. The index value generally declined throughout the year, with the lowest index value of 9.5 occurring in mid-July.

The most recent calculated index value for 2025 occurred in October, with a value of approximately 10.5 feet (NAVD 88) (Figure 12).

Key wells—including 24B03, 30F03, 30N02, 36L01, 36L02, and 32C03—are instrumented with pressure transducers equipped with specific conductivity (conductivity) probes that periodically record water level, water temperature, and conductivity (Figures 13 through 18). Occasional transducer malfunctions have resulted in variable conductivity data in some of the wells during certain years, including 2015 and 2019. Malfunctioning transducers have been replaced and continue to be monitored in an ongoing effort to maintain a properly functioning monitoring network. A key technological upgrade accomplished in 2022 was the addition of telemetry to the pressure transducers installed in the DWI wells (24B03, 30F03, and 30N02). This upgrade provides real-time monitoring of the DWI, allowing for informed, timely decision-making regarding the management of NCMA groundwater resources.

FIGURE 12. HYDROGRAPH OF DEEP WELL INDEX ELEVATION
Northern Cities Management Area
San Luis Obispo County, California
\\GSICLOUD\Projects\672-Northern Cities Management Area\_Grapher Figures\Annual Rpt Figs Fig 12 Hydrograph of Deep Well Index Level_with Approximate DWI data_v2 Notes:NAVD88 - North American Vertical Datum of 1988mg/L - milligrams per liter 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 2030 -1-2-3-4-5
9876543210
2019181716151413121110
Deep Well Index Elevation, feet NAVD88Deep Well Index Elevation (Wells 24B03, 30F03 and 30N02) Deep Well Index (Approximate) 0 800700600500400300200100
Chloride, mg/LWell 30N02 Well 24B03 Well 30F03
Deep Well Index Threshold: 7.5 feet
Deep Well Index is the synoptic average of groundwaterelevations in the deep wells of Sentry Well clusters 24B,30F, and 30N (see Figure 3 for locations of monitoringwells and Figure 4 for well depths)."Approximate" Deep Well Index elevations are based onnon-synoptic measurments, made during the same quarter.

FIGURE 13. WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 24B03 Northern Cities Management Area
San Luis Obispo County, California
2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 -1-2-3-4-5
9876543210
2019181716151413121110
Water Elevation, feet NAVD88
0 800400
2,0001,6001,200
Specific
Conductivity
uS/cm
Well 24B03North Beach Campground Deep WellWell Depth: 435 feet (Careaga Sand)Deep Well Index 7371696765
Temperature
Fº
Deep Well IndexThreshold: 7.5 feet
\\GSICLOUD\Projects\672-Northern Cities Management Area\_Grapher Figures\Annual Rpt Figs Fig 13 NCMA Well 24B03 Notes:NAVD88 - North American Vertical Datum of 1988uS/cm - microsiemens per centimeter Data gap due to accidental removal of transducers by SLO Co.

FIGURE 14. WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 30F03 Northern Cities Management Area
San Luis Obispo County, California
2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 -1-2-3-4-5
9876543210
2019181716151413121110
Water Elevation, feet NAVD88
0 800400
2,0001,6001,200
Specific
Conductivity
uS/cm
Well 30F03Highway 1 Deep WellWell Depth: 372 feet (Careaga Sand)Deep Well Index 7371696765
Temperature
Fº
Deep Well Index
Threshold: 7.5 feet
\\GSICLOUD\Projects\672-Northern Cities Management Area\_Grapher Figures\Annual Rpt Figs Fig 14 NCMA Well 30F03 Notes:NAVD88 - North American Vertical Datum of 1988uS/cm - microsiemens per centimeter Data gap due to accidental removal of transducers by SLO Co.

FIGURE 15. WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 30N02 Northern Cities Management Area
San Luis Obispo County, California
-1-2-3-4-5
9876543210
2019181716151413121110
Water Elevation, feet NAVD88
2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 0 800400
2,0001,6001,200
Specific
Conductivity
uS/cm
Well 30N02Pier Avenue Deep WellWell Depth: 255 feet (Paso Robles Formation)Deep Well Index 7169676563
Temperature
Fº
\\GSICLOUD\Projects\672-Northern Cities Management Area\_Grapher Figures\Annual Rpt Figs Fig 15 NCMA Well 30N02 Deep Well Index
Threshold: 7.5 feet
Sensor malfunction. Field
measurements indicate that
specific conductivity is stable
Notes:NAVD88 - North American Vertical Datum of 1988uS/cm - microsiemens per centimeter Data gap due to accidental removal of transducers by SLO Co.

FIGURE 16. WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 36L01 Northern Cities Management Area
San Luis Obispo County, California
2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 -1-2-3-4-5
9876543210
2019181716151413121110
Water Elevation, feet NAVD88
0 800400
2,0001,6001,200
Specific
Conductivity
uS/cm
Well 36L01Oceano Dunes Deep WellWell Depth: 237 feet (Paso Robles Formation) 7371696765
Temperature
Fº
\\GSICLOUD\Projects\672-Northern Cities Management Area\_Grapher Figures\Annual Rpt Figs Fig 16 NCMA Well 36L01 Notes:NAVD88 - North American Vertical Datum of 1988uS/cm - microsiemens per centimeter

FIGURE 17. WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 36L02 Northern Cities Management Area
San Luis Obispo County, California
2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 -1-2-3-4-5
9876543210
2019181716151413121110
Water Elevation, feet NAVD88
0 800400
2,0001,6001,200
Specific
Conductivity
uS/cm
Well 36L02Oceano Dunes Deep WellWell Depth: 545 feet (Careaga Sand)Well 36L02 Manual Measurements 7371696765
Temperature
Fº
\\GSICLOUD\Projects\672-Northern Cities Management Area\_Grapher Figures\Annual Rpt Figs Fig 17 NCMA Well 36L02 Transducer data corrupted
Dashed where inferred
Sensor malfunction. Field measurements indicate that specific conductivity is stable Notes:NAVD88 - North American Vertical Datum of 1988uS/cm - microsiemens per centimeter

FIGURE 18. WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 32C03 Northern Cities Management Area
San Luis Obispo County, California
2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 -2-4
86420
28262422201816141210
Water Elevation, feet NAVD88
0 800400
2,0001,6001,200
Specific
Conductivity
uS/cm
7371696765
Temperature
Fº
Well 32C03 (County Monitoring Well No. 3)Well Depth: 170 feet (Paso Robles Formation) \\GSICLOUD\Projects\672-Northern Cities Management Area\_Grapher Figures\Annual Rpt Figs Fig 18 NCMA Well 32C03 Notes:NAVD88 - North American Vertical Datum of 1988uS/cm - microsiemens per centimeter

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Wells 24B03, 30F03, and 30N02 comprise the wells used to calculate the DWI. Wells 36L01 and 36L02 are adjacent to the coast. Well 32C03 is the easternmost well and is adjacent to the boundary between the NCMA and NMMA. A discussion of the 2025 water levels for these key wells is included, below:
ƒ Deep Well Index Wells: Water levels at the beginning of 2025 remained elevated (from the preceding above average precipitation years) in the DWI wells, and decreased throughout the spring and summer months of 2025 in response to below-average precipitation received during the second and third quarters.

Water levels peaked in wells 24B03, 30F03, and 30N02 in late January and remained elevated until midApril. The water levels in wells 24B03, 30F03, and 30N02 then declined slightly until mid-July, when they began to rise.

Consistent with patterns seen in previous years is the variability of aquifer response among the three wells.

Well 24B03, the northernmost well located in the North Beach Campground, maintains a relatively stable and moderated water level throughout the year and consistently sustains groundwater elevations higher than the DWI value (Figure 13). The water level in 24B03 mitigates the water levels in 30N02, which typically maintain levels consistently deeper than the DWI. Well 30F03 generally closely follows the DWI value.
ƒ Coastal Wells: The groundwater elevation in well 36L01, screened within the Paso Robles Formation, remained within 6.3 (July 2025) to 8.3 (April 2025) feet (NAVD 88) throughout 2025. These levels are within the historical range; however, they have decreased since 2024 due to below-average precipitation seen throughout 2025. The water level in well 36L02, which is screened within the Careaga Sand, illustrates a much greater seasonal fluctuation than is observed in 36L01. The water elevation in 36L02 ranged from 6.0 feet in July to approximately 15.0 feet (NAVD 88) in January. ƒ NCMA/NMMA Boundary: The groundwater elevation in 2025 declined slightly compared to water levels reported in 2024. In 2025, the groundwater elevation in well 32C03 ranged from 9.9 feet (July 2025) to

17.0 feet (January 2025) (NAVD 88). Although water levels have declined slightly due to below-average precipitation in 2025, they have remained elevated since 2021 and 2022 when seasonal lows were seen below 0.0 feet NAVD 88.

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3.2 Change in Groundwater in Storage
The relative change of groundwater levels and the associated change in groundwater in storage in the NCMA portion of the SMRVGB between April 2024 and April 2025 were estimated using a comparison of water level contour maps created for these periods. Separate estimates of change in groundwater in storage were computed for both the deep aquifer system and the alluvial aquifer and then summed together to represent the total NCMA estimated change in groundwater in storage. The comparison of the April water levels was chosen to comply with DWR reporting requirements and SGMA.

For each aquifer, the groundwater contour lines from each period were compared, and the volumetric difference between the two periods was calculated. The same selection of deep aquifer and alluvial aquifer wells was used to calculate the volumetric difference for both periods. The change of groundwater elevations for the deep aquifer is presented in Figure 19. This figure illustrates that water elevations in the deep aquifer system generally decreased across the majority of the NCMA. The most significant decreases occurred along the eastern boundary near NMMA. However, water elevations increased in the north-central portion of NCMA, near the Grover Beach municipal wells. Overall, there was a negative net change in groundwater storage in the deep aquifer. Figure 20 shows that decreases in alluvial aquifer water elevations occurred throughout a majority of the Cienega Valley, with the largest decreases occurring in the areas of inflow from Arroyo Grande Creek and Los Berros Creek. Water elevations increased slightly in the outflow area from Arroyo Grande Creek.

Overall, there was a negative net change in groundwater storage in the alluvial aquifer.

From the change in groundwater elevation maps, a volumetric change in groundwater in storage estimate was made for each aquifer, based on assumed aquifer properties,19 and then summed to represent the total NCMA estimated change in groundwater in storage. The net changes in groundwater levels in both aquifers represent a net decrease of groundwater in storage from April 2024 to April 2025 of approximately 1,149 AF (compared to a net increase of 530 AF during the previous year).
19 A storage coefficient of 0.02 was used for the deep aquifer system. This is representative of the Paso Robles Formation and Careaga Sand in the area, as documented in the SMRVGB Characterization Project (Fugro, 2015).

A specific yield value for the alluvial aquifer of 0.09 was back-calculated using the 2019 estimated change in alluvial groundwater in storage represented by the calculated agricultural demand (see Section 4.2.1) and an alluvial groundwater elevation change map representing the total volume change that occurred between April 2019 and October 2019.

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3.3 Water Quality
Water is used in several ways in the NCMA, and each use requires a certain minimum water quality. Because contaminants from seawater intrusion or anthropogenic sources can potentially impact the quality of water in the aquifer, water quality is monitored at each of the sentry well locations in the NCMA and County Monitoring Well No. 3 (32C03).

3.3.1 Quarterly Groundwater Monitoring
Quarterly groundwater monitoring events occurred in January, April, July, and October 2025. During each event, depths to groundwater were measured, and wells were sampled using procedures, sampling equipment, and in-field sample preservation protocol pursuant to ASTM International Standard D4448-01.

The water quality data from these events and historical data from these wells are provided in Appendix A.

Graphs of historical chloride and TDS concentrations over time are presented in Figure 21 and Figure 22, respectively, to monitor for trends that may aid in the detection of impending seawater intrusion.

The historical water quality data show that concentration levels of chlorides and TDS, as well as other constituents, have remained relatively stable within a narrow historical range since 2009. Improved management of municipal groundwater use, because of an overall reduction in pumping since 2009, has likely contributed to the past several years of relatively stable groundwater quality.

In the first quarter of 2022, water quality results in OCSD MW-Yellow exhibited a change in water quality type when compared to historical records. As a result of the unusual Q1 water quality results in OCSD MW-Yellow, the well was resampled in February 2022. Results from the re-sample analysis confirm the Q1 shift in water quality in OCSD MW-Yellow. Considering the nearly identical water quality results between the OCSD MWYellow and MW-Blue wells, it was concluded that the well casing in the MW-Yellow completion has become compromised and open to the formation within a similar strata as the MW-Blue perforated interval (~190 to 265 feet below ground surface [bgs]). Therefore, the MW-Yellow well completion is no longer considered representative of the 625 to 645 feet below-ground surface interval of the Careaga Sand (see Figure 4) and has been removed from the NCMA Monitoring Program. In the second quarter of 2022, MW-Yellow was sounded to its full depth of completion (645 feet), indicating that the well casing had not fully collapsed at that time. Well abandonment for the MW-Yellow completion is being considered by the TG.

FIGURE 21. CHLORIDE CONCENTRATIONS IN MONITORING WELLS
Northern Cities Management Area
San Luis Obispo County, California
2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
0 200100
0 200100
0 200100
0 200100
\\GSICLOUD\Projects\672-Northern Cities Management Area\_Grapher Figures\Annual Rpt Figs\2025 Annual Report 20260130 Fig 21 NCMA Chloride Grouped Well 24B03
Well 24B02
Well 30F01 Well 30F02
Well 30F03
Well 30N03
Well 30N02
Well 36L02
Well 36L01
Well 32C03
Chloride Concentration, mg/L
North Beach Campground
Highway 1
Pier Avenue
Oceano Dunes and 32C03
Notes:mg/L - milligrams per liter

FIGURE 22. TOTAL DISSOLVED SOLIDS CONCENTRATIONS IN MONITORING WELLS Northern Cities Management Area
San Luis Obispo County, California
2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
0 500
1,5001,000
0 500
1,5001,000
0 500
1,5001,000
0 500
1,5001,000
\\GSICLOUD\Projects\672-Northern Cities Management Area\_Grapher Figures\Annual Rpt Figs\2025 Annual Report 2026 0130 Fig 22 NCMA TDS Grouped Well 24B03
Well 24B02
Well 30F01 Well
30F02
Well 30F03
Well 30N02
Well 30N03
Well 36L01
Well 36L02
Well 32C03
Total Dissolved Solids Concentration, mg/L
North Beach Campground
Highway 1
Pier Avenue
Oceano Dunes and 32C03
Notes:mg/L - milligrams per liter

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3.3.2 Analytical Results Summary
Analytical results of key water quality data, including chloride, TDS, and sodium, were generally consistent with historical concentrations and observed ranges of constituent concentrations during 2025. Although some monitoring wells reported constituents above the California DDW secondary maximum contaminant limit for TDS and/or sulfate (36L01 and 30N02), no water quality results indicate seawater intrusion.

Figure 23A through D are a set of Piper diagrams representing groundwater sampling results from each of the quarterly sampling events in 2025. The Piper diagram provides a means of presenting the relative abundance of common ions (cations and anions) in each water quality sample. The relative abundance of common ions in each water quality sample, including cations- sodium, calcium, magnesium, and potassium, and anionsbicarbonate, chloride, and sulfate- determines the ‘water quality type’ of the sample. Examples of different water quality types include ‘calcium-magnesium-sulfate’ type (i.e., 30N02 and 36L01), ‘sodium-chloride’ type (i.e., 32C03), and ‘calcium-bicarbonate’ type (all remaining monitored wells). The Piper diagrams (Figure 23A through23D) show the quarterly 2025 water quality results, which generally fall into these three water quality type groupings. The relative abundance of common ions found in seawater is presented as a red “X” on the Piper diagrams for reference purposes. Well 32C03 generally demonstrates the most similar signature to seawater; however, this well is over a mile from the coast, and the TDS present in 32C03 is more than two orders of magnitude lower than that of seawater.20 In the event of possible future incipient seawater intrusion, migration towards the seawater base (red “X”) would be expected for the affected well(s) on the Piper diagram.

Three separate water quality types are found in the monitoring wells:

1. The Pier Avenue deep well (30N02), screened in the Paso Robles Formation from 175 to 255 feet bgs, and the Oceano Dunes intermediate well (36L01), screened in the Paso Robles Formation from 227 to 237 feet bgs, are screened in the same production zone. This is despite their different nomenclature as “deep” compared with “intermediate” wells. Relative to the other wells in the area, these two wells are high in sulfates and have calcium-magnesium-sulfate-rich water. Both wells are relatively low in chloride. This is significant because this zone, and well 30N02, was the site of an apparent seawater intrusion event characterized by a rapid increase in chloride concentrations in 2009–2010.

2. The County Monitoring Well No. 3 (32C03), screened from 90 to 170 feet bgs, in the Paso Robles Formation, has an apparent water quality that is different than any of the other wells in the area. It is relatively high in sodium, chloride, and potassium. Its location in the right quadrant of the diamondshaped part of the Piper diagram (Figure 23A through 23D) commonly characterizes a sodiumchloride-rich groundwater representative of marine or deep ancient groundwater, even though it is a relatively shallow well and screened within the Paso Robles Formation, a Plio-Pleistocene-age alluvial deposit.

3. All of the other wells in the monitoring network fall into the third category of groundwater quality. These wells are all generally calcium-bicarbonate groundwater that is commonly associated with shallow groundwater. This grouping of water quality represents groundwater from wells that are screened in both the Paso Robles Formation and the Careaga Sand (wells 24B03, 30F03, and 36L02 are screened in the Careaga Sand; the others are screened in the Paso Robles Formation). 20 The concentration of TDS in well 32C03 is generally the lowest out of all 16 historically monitored wells in NCMA.

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None of the water quality results from monitoring wells throughout 2025 indicate an incipient episode or immediate threat of seawater intrusion. There have been no water quality results indicative of seawater intrusion since the decline of TDS, sodium, and chloride concentrations detected in Paso Robles Formation wells 30N02, 30N03, and OCSD MW-Blue following the 2009–2010 seasons. No indications of seawater intrusion have been observed in wells screened in the underlying Careaga Sand. At this time, without additional offshore data, the precise location of the interface or mixing zone is not known and will not be known unless and until it intercepts a monitoring well. However, the airborne electromagnetic survey conducted in 2020 (Ramboll, 2022) indicates that no seawater intrusion was occurring in the deep aquifer system at the time of the survey and that the interface generally conformed to the Ghyben-Herzberg ratio.21 A second airborne electromagnetic survey was conducted in November 2023. The data from this survey became available in the fourth quarter of 2024 and is planned to be reviewed by the TG. 21 Under normal conditions, the higher density of saltwater causes it to move into coastal aquifers in a wedge shape under the freshwater. The shape of the saltwater wedge is described by the Ghyben–Herzberg ratio which states that, for every foot of fresh water in an unconfined aquifer above sea level, there will be forty feet of fresh water in the aquifer below sea level (Ploessel, 1982).

FIGURE 23A.

PIPER DIAGRAMS OF WATER QUALITY IN SELECT MONITORING WELLS - 2025 Q1 RESULTS Northern Cities Management Area
San Luis Obispo County, California

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FIGURE  FIGURE 23%. PIPER DIAGRAMS OF WATER QUALITY IN SELECT MONITORING WELLS - 2025 Q2 RESULTS Northern Cities Management Area San Luis Obispo County, California

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FIGURE  FIGURE 23&. PIPER DIAGRAMS OF WATER QUALITY IN SELECT MONITORING WELLS - 2025 Q3 RESULTS Northern Cities Management Area San Luis Obispo County, California

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FIGURE  FIGURE 23'. PIPER DIAGRAMS OF WATER QUALITY IN SELECT MONITORING WELLS - 2025 Q4 RESULTS Northern Cities Management Area San Luis Obispo County, California

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SECTION 4: Water Supply and Production/Delivery

4.1 Water Supply
The NCMA water supply consists of three major sources: Lopez Lake, the SWP, and groundwater. Each source of supply has a defined delivery volume that varies from year to year.

4.1.1 Lopez Lake
The Lopez Project consists of Lopez Lake, Lopez Dam, Lopez Terminal Reservoir, and Lopez Water Treatment Plant, and is operated by SLOFCWCD Zone 3. SLOFCWCD Zone 3 provides treated water directly to the Zone 3 agencies and releases water to Arroyo Grande Creek for habitat conservation and agricultural use. The Zone 3 agencies include Arroyo Grande, Grover Beach, Pismo Beach, OCSD, and CSA 12, which serves Avila Beach and is not in the NCMA.

The operational safe yield of Lopez Lake is 8,730 AFY, which reflects the amount of sustainable water supply.

Of this, 4,530 AFY is apportioned to the agencies, and 4,200 AFY is reserved for downstream releases to maintain flows in Arroyo Grande Creek and provide groundwater recharge. Contract changes that went into effect at the end of October 2022 allow Zone 3 agencies to store unused entitlement water and downstream release water in the reservoir for later use (see further details below). The 2025 SLOFCWCD Zone 3 entitlements are shown in Table 2.

Table 2. Lopez Lake (SLOFCWCD Zone 3 Contractors) Water Entitlements (AFY) Contractor
Contract Water
Entitlement
(AFY)
Percent of Total
Arroyo Grande 2,290 50.55%
Grover Beach 800 17.66%
Pismo Beach 892 19.69%
OCSD 303 6.69%
CSA 12 (not in NCMA) 245 5.41%
Total 4,530 100%
Downstream Releases 4,200 —
Safe Yield of Lopez Lake 8,730 —
Notes
— = not applicable AFY = acre-feet per year CSA = County Service Area NCMA = Norther Cities Management Area OCSD = Oceano Community Services District SLOFCWCD = County of San Luis Obispo Flood Control & Water Conservation District In December 2014, SLOFCWCD Zone 3 adopted the Low Reservoir Response Plan (LRRP) (SLOFCWCD, 2014).

The LRRP establishes actions that SLOFCWCD Zone 3 can take when the amount of water in storage in the reservoir drops below 20,000 AF, provided that the SLOFCWCD Board of Supervisors declares a drought emergency. The purpose of the LRRP is to limit downstream releases and municipal diversions from Lopez Lake to preserve water within the reservoir, above the minimum pool, for a minimum of 3 to 4 years under drought conditions.

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The reduction strategies for the LRRP are tied to the amount of water in the reservoir. As the amount of water in the reservoir drops below the triggers (20,000; 15,000; 10,000; 5,000; and 4,000 AF), the hydrologic conditions are reviewed, and adaptive management is used to meet the LRRP objectives. The municipal diversions are to be reduced according to the strategies shown in Table 3.

Table 3. Lopez Lake Municipal Diversion LRRP Reduction Strategy Amount of Water
in Storage (AF)
Municipal Diversion
Reduction AFY
20,000 0% 4,530
15,000 10% 4,077
10,000 20% 3,624
5,000 35% 2,941
4,000 100% 0
Notes
AF= acre-feet AFY = acre-feet per year LRRP = Low Reservoir Response Plan The initial prescribed actions after the LRRP is enacted include (1) reductions in entitlement water deliveries; (2) reductions in downstream releases; (3) no new allocations of surplus water from unreleased downstream releases; and (4) extension of time that agencies can take delivery of existing unused water throughout the duration of the drought emergency, subject to evaporation losses if the water is not used in the year of original allocation. Included in the LRRP is an adaptive management provision that allows the initial prescribed actions to be modified and adapted to specific drought conditions.

The initial prescribed actions concerning downstream releases are that they should be reduced according to the strategies described in Table 4. The release strategies represent the maximum amount of water that can be released. The SLOFCWCD Zone 3 controls the timing of the reduced releases to meet the needs of the agricultural stakeholders and to address environmental requirements.

Table 4. Lopez Lake Downstream Release LRRP Reduction Strategy Amount of Water
in Storage (AF)
Downstream Release
Reduction AFY
20,000 9.5% 3,800
15,000 9.5% 3,800
10,000 75.6% 1,026
5,000 92.9% 300
4,000 100% 0
Notes
AF= acre-feet AFY = acre-feet per year LRRP = Low Reservoir Response Plan

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The LRRP was put into effect on April 1, 2015. Throughout 2015 and all of 2016, SLOFCWCD Zone 3 operated Lopez Lake pursuant to the 15,000 AF diversion reduction trigger that required a 10 percent reduction in municipal diversions. The 10,000 AF trigger requiring a 20 percent reduction was avoided in 2016 because the agencies enacted mandatory water conservation measures and voluntarily reduced municipal diversions from Lopez Lake by 20 percent. Lopez Lake recovered from a low of 11,000 AF in storage to a peak of more than 30,000 AF in May 2017, ending with approximately 25,000 AF at the start of 2018 because of the relatively heavy rainfall year of late 2016 and early 2017. Although contractually the LRRP is no longer in effect when both triggers are rescinded (i.e., the Board of Supervisors declaration of water emergency and reduction of reservoir levels to below 20,000 AF), the SLOFCWCD Zone 3 agencies resolved to keep the LRRP in effect. Because the reservoir volume was above 20,000 AF, no mandatory reductions in municipal deliveries were required in 2017, 2018, or 2019. In 2020, the reservoir storage level stayed above 20,000 AF until December, when it reached a level of 19,826 AF. The LRRP was not activated during 2020.

In 2021, the highest reservoir storage level occurred in January, at 19,874 AF. The reservoir storage level declined throughout most of 2021, reaching a low point of 14,174 AF in November. With the declining reservoir storage approaching the 15,000 AF trigger level, the Board of Supervisors voted on August 24, 2021, to enact the LRRP, and the initial prescribed action of a 10 percent municipal entitlement reduction (retroactive to April 2021) was put in place. The year 2021 ended with reservoir storage at just less than 15,000 AF. On July 21, 2022, the Zone 3 Advisory Committee endorsed a 20 percent municipal entitlement reduction (retroactive to April 2022) in anticipation of reaching the 10,000 AF trigger of the LRRP. Throughout 2022, reservoir levels continued to drop until they reached a low point of 10,837 AF on December 10, 2022. Above normal precipitation occurring during the second half of December resulted in reservoir levels recovering to 11,690 AF by the end of 2022. The LRRP remained in effect with 20 percent municipal entitlement reductions through the end of 2022.

As a result of above-average rainfall in January through March 2023, the Lopez Lake storage level rapidly increased to maximum capacity (49,476 AF) and began spilling in March 2023. The reservoir continued to spill through June 2023, after which reservoir levels slowly began to decline through October. On January 19, 2023, the Zone 3 Advisory Committee approved exit from the LRRP and a return to 100 percent Lopez entitlements retroactive to April 1, 2022.

As a result of contract changes that went into effect at the end of October 2022, the Zone 3 agencies are now able to store their unused annual water entitlement and any surplus water they receive in Lopez Reservoir, as well as allow for in-lieu storage of SWP water. In other words, each agency now has a stored water account.

The purpose of these changes is to provide agencies greater flexibility to better manage their water supply portfolios and incentivize the conservation of water during emergencies and droughts. The changes provide the agencies greater flexibility to use their water supplies conjunctively (i.e., to implement a balanced use of surface and groundwater supplies based on hydrologic conditions) and additionally allow agencies to transfer stored Lopez and SWP water amongst themselves to improve water supply availability during drought conditions and water supply resiliency for the region.

Under the new Zone 3 contracts, Surplus water is generated by unused downstream releases from the prior Zone 3 water year (April 1 through the following March 31), and Stored water is generated by unused entitlement water. Unlike Surplus water, Stored water can accrue and be accessed indefinitely as long as the stored quantity does not get lost in a spill. Unused entitlement water is calculated annually at the end of each water year on March 31. When the new contracts were adopted in October 2022, existing surplus water for each agency was converted into Stored water as a one-time deal. However, all the Stored water was lost because of the prolonged spill event that occurred from March through June 2023.

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During a month when the reservoir is spilling, Zone 3 agencies are able to take as much of their proportionate share of the spilled volume as they choose without incurring debit against their contract entitlement amount (each agency’s proportionate share is shown in Table 2). For example, Arroyo Grande’s contracted entitlement share is 50.55 percent, so they get 50.55 percent of the total spilled volume credited toward their usage that month (personal communication with David Spiegel, SLOFCWCD, on January 25, 2024). However, while the reservoir is spilling, contractors also lose any Surplus and Stored water they may have at the same rate.

Storage is calculated on an annual basis at the end of each Lopez water year – specifically on March 31 – and water is recorded into storage on April 1. In 2025, the agencies’ calculated unused entitlement for the 2024/2025 water year was 1,935 AF (including evaporation losses), which was transferred into their respective storage accounts on April 1, 2025. The available storage includes evaporation losses from April 1, 2025, through December 31, 2025. Surplus water, the agencies’ calculated unused downstream releases for the 2024/2025 water year, was 868 AF.

In August 2024, a coalition of four environmental groups (San Luis Obispo Coastkeeper, Los Padres ForestWatch, California Coastkeeper Alliance, and Ecological Rights Foundation) filed a lawsuit alleging that the County, which operates the Lopez Project as SLOFCWCD Zone 3, is in violation of the ESA, and requested an increase of releases from the Lopez Dam to support steelhead populations, and to provide fish passage past the dam. In December 2024, U.S. District Judge Sherilyn Peace Garnett ordered a preliminary injunction that required the County to immediately increase downstream releases into Arroyo Grande Creek by about 45 percent to support fish habitat in the creek. This resulted in approximately 1,500 AF of additional water to be released from Lopez into Arroyo Grande Creek during 2025. The County appealed the ruling stating that an increase in downstream releases could impact other protected species, such as California red-legged frogs and tidewater goby, and also impact local water supply for 50,000 residents. On December 3, 2025, the U.S.

Court of Appeals for the Ninth Circuit ruled in favor of the County (SLO Co., 2025a). Shortly thereafter, the water release rate was returned to the release schedule as defined in the IDRS (SLO Co., 2007). The IDRS was prescribed in 2007 by the NMFS, in coordination with the SLOFCWCD Zone 3 and the NCMA agencies, which purchase Lopez water. The IDRS is considered to be in compliance with the ESA until the Arroyo Grande Creek Habitat Conservation Plan is finalized. However, the case is still proceeding in court. If the original ruling were allowed to stand, it would result in significant negative impacts to the finances of the NCMA agencies and their ability to supply water to their customer base.

On April 30, 2025, a Boil Water Notice was communicated to communities that receive water from the Lopez Project. As part of routine water testing from 13 locations in the Lopez distribution system on April 28, 2025, five samples tested positive for total coliform bacteria, and one site tested positive for Escherichia coli (E. coli).

Confirmation sampling performed on April 29, 2025, and reported on April 30, 2025, indicated that two locations tested positive for total coliform and zero locations tested positive for E. coli. At this point the Boil Water Notice was issued and distributed to nearly 50,000 residents in order to protect public health. It is important to note that all local water agencies that tested their distribution systems reported no contamination during the event. As a result of the Boil Water Notice, Grover Beach, Arroyo Grande, and Oceano switched to groundwater production only for supply for about 8 days. As a result of this unusual near-exclusive reliance on groundwater, the DWI dropped 2 feet in a week (Figure 24.).

Lopez Lake started the year at 45,458 AF in storage on January 1, 2025. The storage level continued to increase, filling to a maximum of 46,366 AF on April 2, 2025 (maximum capacity is 49,476 AF) (SLO Co., 2025b). Reservoir levels slowly began to decline through the end of the year, reaching a low of 39,142 AF in storage on December 23, 2025 (SLO Co., 2025b).

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The total deliveries from Lopez Lake in 2025 were 9,845 AF, of which 4,095 AF were delivered to NCMA contractors, 105 AF were delivered to CSA 12, and 5,645 AF were released downstream to maintain flow in Arroyo Grande Creek (Table 5).

Lopez Lake Stored and Surplus water deliveries to the NCMA agencies were 1,239 and 731 AF, respectively.

Lopez Lake did not spill in 2025; therefore, spilled water deliveries to NCMA agencies were 0 AF in 2025 (Table 5).

Table 5. Lopez Lake Deliveries, 2025
Contractor
Entitlement
Usage
(AF)
Lopez
Stored
(AF)
Surplus
Usage
(AF)
Lopez
Spill (AF)
Deliveries
During
DistrictInitiated
Exchange
(AF)
Total Lopez Lake
Water Delivery
(AF)1
Arroyo Grande 649 722 470 0 50 1,891
Grover Beach 672 0 0 0 35 708
Pismo Beach 441 398 183 0 0 1,022
OCSD 248 119 78 0 29 473
Total NCMA 2025 Usage1 2,010 1,239 731 0 114 4,095
CSA 12 (not in NCMA) 105 0 0 0 0 105
Downstream Releases 5,645 — — — - 5,645
Total 2025 Lopez Lake
Deliveries1 7,760 1,239 731 0 114 9,845
Notes
1 As a result of rounding, totals may not correspond exactly to the sum of all figures shown. — = not applicable AF= acre-feet CSA = County Service Area NCMA = Northern Cities Management Area OCSD = Oceano Community Services District
Source: SLOFCWCD Zone 3 Monthly Operations Reports; based on Calendar Year of January 1, 2025, through December 31, 2025.

6,000,000
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Groundwater Production (Gallons)
Groundwater Elevation (feet)
Date
Arroyo Grande Production Grover Beach Production OCSD ProductionPismo Beach Production -24B3 -30F03 -30N02 DWI DWI Threshold FIGURE 24
Key Well Groundwater Elevations and Agency Production During Boil Water Notice Northern Cities Management Area
San Luis Obispo County, California

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4.1.2 State Water Project
Pismo Beach and OCSD have contracts with SLOFCWCD Zone 3 to receive water from the SWP. The SLOFCWCD serves as the SWP contractor and provides imported water to local retailers through the SWP Coastal Branch (Coastal Branch) pipeline. Pismo Beach and OCSD, as subcontractors to SLOFCWCD, have annual contractual water delivery allocations, commonly referred to as Table A water, of 1,24022 AFY and 750 AFY, respectively (Table 6). In addition to its Table A allocation, Pismo Beach holds 1,240 AFY of additional allocation known as “drought buffer” and OCSD holds an additional allocation of 750 AFY of drought buffer. The additional drought buffer allocation held by the agencies is available to augment the SWP water supply when the SWP annual allocation, i.e., the percentage of SWP water available, is less than 100 percent. The additional allocations also increase each agency’s water held in storage. In any given year, however, the SWP contracts held by Pismo Beach and OCSD are only guaranteed for up to 1,240 AF and 750 AF, respectively.23 On November 15, 2022, the Pismo Beach City Council directed staff to work with the SLOFCWCD to increase the Pismo Beach SWP drought buffer to 3,192 AFY, and in April 2023, the OCSD Board of Directors directed staff to increase the OCSD SWP drought buffer to 1,150 AFY. In July 2025, the District Board directed staff to work with the Subcontractors to update the SWP subcontracts, including the drought buffer. Both of these drought buffer increases are still pending as of the date of this 2025 Annual Report.

As a result of the recent contract changes, the Zone 3 contractors are now able to store unused allocated SWP water locally in Lopez Reservoir for later use (Stored SWP24 water). Because there is no direct physical connection between Lopez Reservoir and the SWP, no actual SWP water would physically be in the reservoir.

Rather, the exchange would be an in-lieu exchange that occurs on paper through the water accounting process. In WY 2025, no SWP water was stored for any of the agencies in Table 6.

Table 6. NCMA SWP Table A Allocations, Drought Buffers, Stored Water, and 2025 Deliveries Agency
Table A
Allocation
(AFY) 1
Drought
Buffer
(AFY)1
Stored SWP
Water
(AF)
2025
Delivery
(AF)2
Arroyo Grande — — — —
Grover Beach — — — —
Pismo Beach 1,240 1,240 0 486
OCSD 750 750 0 95
Total Allocation/Delivery,
AFY 1,990 1,990 0 581
Notes
— = not applicable AF=acre feet AFY= acre-feet per year NCMA = Northern Cities Management Area OCSD = Oceano Community Services District SWP = California State Water Project 1 Assumed District can supply 100% of the requested delivery to meet requests that exceed the current DWR allocation. DWR set Table A allocation for subcontractors in 2025 at 50%. The SWP contracts held by Pismo Beach and OCSD are only guaranteed for up to 1,240 AF and 750 AF, respectively (personal communication with Wes Thomson, SLOFCWCD, on February 25, 2026). Based on Calendar Year of January 1, 2025, through December 31, 2025. 2 Includes both SWP allocation usage and SWP District Initiated Exchange (DIE) Storage usage. 22 100 AF of this 1,240 AF was previously owned by a private party. However, as of October 2022 the 100 AF has been re-retained by City of Pismo Beach with 20 AF being reserved for the private party. 23 If excess water is available and there is capacity in the pipeline the SWP contracts between SLOFCWCD Zone 3 and Pismo Beach or OCSD do not prevent annual deliveries in excess of 1,240 AF or 750 AF, respectively (personal communication with David Spiegel, SLOFCWCD, on February 3, 2022).
24 Not to be confused with SWP “carryover water” stored in San Luis Reservoir.

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The SWP annual allocation for all contractors throughout California (including SLOFCWCD, Pismo Beach, and OCSD) for 2025 was initially set on December 2, 2024, at 5 percent of Table A’s contractual allocation amounts. The 2025 SWP allocation was then increased each month until a final allocation was set at 50 percent on April 29, 2025.

SWP contractors can store undelivered Table A water at the SWP facility in San Luis Reservoir (limitations exist on the amount that can be stored in any one year). This stored water is called “carryover water” and can be delivered in subsequent years, but total annual deliveries cannot exceed their Table A allocation due to capacity restrictions in the Coastal Branch. In addition, carryover water can be lost (or “spilled”) if its storage interferes with the storage of current-year SWP water for project needs. The SWP contracts for Pismo Beach and OCSD are guaranteed at 1,240 AF and 750 AF, respectively.

The SWP supply has the potential to be affected by drought and environmental issues, particularly because of the endangered Delta smelt in the Sacramento-San Joaquin Delta (Delta). However, OCSD and Pismo Beach, as well as the other SLOFCWCD subcontractors, have not been negatively affected to date by reduced SWP supplies because of the SLOFCWCD’s large amount of unsubscribed Table A allocation, which has been used to fulfill subcontractors’ requests, even in dry years. Therefore, even when SWP supplies are decreased, the SLOFCWCD’s unsubscribed allocation and any carryover water in San Luis Reservoir provide a buffer so that contracted volumes to subcontractors such as OCSD and Pismo Beach may still be provided in full. During 2025, Pismo Beach took delivery of 419 AF of its allocated SWP water, and OCSD took delivery of 55 AF of its allocated SWP water. In addition, District Initiated Exchange (DIE) Stored SWP water totaled 67 AF for Pismo Beach and 41 AF for OCSD.

4.1.3 Groundwater
The 2008 Judgment and the 2002 Settlement Agreement govern the use of groundwater in the NCMA and establish that groundwater will continue to be allotted and independently managed by the NCMA agencies, NCMA overlying owners, and SLOFCWCD (collectively known as the Northern Parties). Each of the NCMA agencies has the capability to extract groundwater from municipal water supply wells located in the central and northern portions of the NCMA (Figure 25). Groundwater also satisfies agricultural irrigation and rural domestic use throughout the NCMA.

The calculated, consensus safe yield value of 9,500 AFY for the NCMA portion of the SMRVGB was formalized in the 2002 Settlement Agreement through affirmation of the 2002 Groundwater Management Agreement among the NCMA agencies. The basis of the safe yield was established in 1982 by a Technical Advisory Committee (TAC), consisting of representatives from Arroyo Grande, Grover Beach, Pismo Beach, OCSD, Avila Beach Community Water District, Port San Luis Harbor District, the Farm Bureau, and the County to deal with a safe yield allocation strategy and agreement not to exceed the safe yield of what was then called the Arroyo Grande Groundwater Basin. The basis for the committee’s analysis was DWR (1979). The TAC concluded that the safe yield was 9,500 AFY. These findings and the allocation of the safe yield were incorporated into a groundwater management plan (1983 Gentlemen’s Agreement and 2002 Groundwater Management Agreement) and further formalized in the 2002 Settlement Agreement and the 2005 Stipulation.

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The 9,500 AFY safe yield provides allotments for agricultural irrigation of 5,300 AFY, subsurface outflow to the ocean of 200 AFY, and urban use entitlement of 4,000 AFY. The original volume of the entitlement for urban use was subdivided among the agencies as follows:
ƒ Arroyo Grande: 1,202 AFY
ƒ Grover Beach: 1,198 AFY
ƒ Pismo Beach: 700 AFY
ƒ OCSD: 900 AFY

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The safe yield allotment for agricultural irrigation defined by the court is significantly higher than the actual historical agricultural irrigation demand, and the calculated amount for subsurface outflow is likely lower than the actual outflow. Todd (2007) recognized that maintaining sufficient subsurface outflow to the coast and preservation of a westward groundwater gradient are essential to preventing seawater intrusion. A regional outflow of 3,000 AFY was estimated as a reasonable approximation (Todd, 2007), although the minimum subsurface outflow necessary to prevent seawater intrusion is unknown. The Phase 1C model (see Section

1.7.3) may be utilized in the future to further evaluate regional subsurface outflow to the ocean.

The 2002 Groundwater Management Agreement provides that groundwater entitlements of each of the urban agencies can be increased when land within the corporate boundaries is converted from agricultural use to urban use, which is referred to as an agricultural conversion credit. Agricultural conversion credits equal to 121 AFY and 209 AFY were developed in 2011 for Arroyo Grande and Grover Beach, respectively, resulting in increased entitlements of 1,323 AF and 1,407 AF, respectively. These agricultural credits were unchanged during 2025.

Total groundwater production in the NCMA, including agricultural irrigation and rural uses, is shown in Table 7 (descriptions of agricultural irrigation applied water and rural use estimation are provided in Sections

4.2.1 and 4.2.2, both below, respectively). The total estimated groundwater pumpage in 2025 from the NCMA portion of the SMRVGB was 3,377 AF.

Table 7. NCMA Groundwater Entitlement and Production from Santa Maria River Valley Groundwater Basin, 2025
Total Entitlement/Use
Groundwater Entitlement + Ag
Conversion Credit
(AF)
2025 Groundwater
Use from SMRVGB
(AF)
Total Urban Groundwater Entitlement /Use 4,000 + 330 = 4,330 801 Total NCMA Groundwater Entitlement /Use 9,500 3,377
Notes
AF= acre-feet Ag = agriculture NCMA = Northern Cities Management Area SMRVGB = Santa Maria River Valley Groundwater Basin

4.1.4 Developed Water
The 2005 Stipulation states that “developed water” is “groundwater derived from human intervention” and states that this includes infiltration from the following sources: “Lopez Lake water, return flow, and recharge resulting from stormwater percolation ponds.” Return flow results from deep percolation of water used in irrigation that is more than the requirement of the plant. Return flows have not been estimated recently, but would be considered part of the groundwater basin inflow.

In 2008, Arroyo Grande, Grover Beach, and Pismo Beach prepared stormwater management plans. To control stormwater runoff and to increase groundwater recharge, each city now requires that new development construct onsite retention or detention ponds. As these new ponds or basins are constructed, the increase in groundwater recharge could result in the recognition of substantial augmentation of basin yield and provision of recharge credits to one or more of the NCMA agencies (Todd, 2007). Thus, a re-evaluation of estimated

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stormwater recharge is warranted as new recharge facilities are installed and as additional information on flow rates, pond size, infiltration rates, and tributary watershed area becomes available.

4.1.5 Other Supplies
Arroyo Grande owns three water wells that are located outside the SMRVGB and pump groundwater from the Pismo Formation. Two of the wells are pumped by the City and used for municipal consumption; the third well is likely to be used in the future. There is no established entitlement that limits the volume of groundwater that Arroyo Grande can pump from these wells, but for planning purposes, the City assumes that they can pump up to 160 AFY for municipal use. The volume that Arroyo Grande pumps from these wells varies from year to year and is included in summary totals for urban water use, but the volume is not included in the summary totals for SMRVGB production.

4.1.6 Total Water Supply Availability
The baseline, or full entitlement, water supply available to the NCMA agencies is summarized in Table 8. The baseline water supplies include 100 percent Lopez Lake entitlement, SMRVGB groundwater entitlements, agricultural credits, and 100 percent delivery of SWP allocations. This baseline water supply does not include Lopez Lake Surplus or Stored water, SWP carryover, or Stored SWP water, because these supplies vary from year to year and are not always available. The category “Other Supplies” includes groundwater pumped from outside the NCMA boundaries (outside the SMRVGB). The baseline supply for the NCMA agencies totals 10,765 AFY.

Table 8. Baseline (Full Entitlement) Available Urban Water Supplies (AFY) Agency Lopez
Lake
SWP Allocation
(at 100%)
Groundwater
Entitlement Ag Credit Other Supplies Total
City of Arroyo
Grande 2,290 0 1,202 121 160 3,773
City of Grover Beach 800 0 1,198 209 0 2,207
City of Pismo Beach 892 1,240 700 0 0 2,832
OCSD 303 750 900 0 0 1,953
Total 4,285 1,990 4,000 330 160 10,765
Notes
AFY= acre-feet per year Ag = agriculture OCSD = Oceano Community Services District SWP = California State Water Project

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Table 9, summarizes the available water supply to the NCMA agencies in 2025, including Lopez Lake Entitlement, Surplus, and Stored water, the 2025 SWP Table A delivery schedule, available SWP carryover water, and available Stored SWP water. The total available water supply is a compilation of all components of each agency’s portfolio. As of 2024, reporting SWP carryover availability on an individual basis was discontinued, and that supply is now reported as a single amount of carryover water available to all the District’s subcontractors. As of January 1, 2025, 6,294 AF of SWP carryover water was available for all of the District’s subcontractors.25
25 Per personal communication with Wes Thomson, February 20, 2026.

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Annual Monitoring ReportGSI Water Solutions, Inc. 68 Table 9. Available Urban Water Supply, 2025 (AF) Agency Lopez Lake Entitlement
Available
Lopez
Lake
Surplus1
Available
Lopez Lake
Storage2
2025
Available
SWP
Contract
Supply3
SWP
Carryover4
Stored
SWP5
Groundwater
Entitlement
Ag
Credit
Other
Supplies Total (2025)
Arroyo Grande 2,290 470 722 - - - 1,202 121 160 4,965 Grover Beach 800 164 525 - - - 1,198 209 0 2,896 Pismo Beach 892 183 391 1,240 Varies 0 700 0 0 3,406 OCSD 303 0 118 750 Varies 0 900 0 0 2,071 Total 4,285 868 1,935 1,990 Varies 0 4,000 330 160 13,338 Notes All units in acre-feet (AF). 1 Available Lopez Lake Surplus Water is calculated based on unused downstream releases at the end of the water year. Values listed in the table are valid from April 1, 2025, through December 31, 2025. (April 1 – March 31). (personal communication with Desiree Bravo, SLOFCWCD, on February 17, 2026). 2 Available Lopez Lake Stored Project Water is derived from unused entitlement water at the end of the water year. Values listed in table are valid from April 1, 2025, through December 31, 2025. The available storage includes evaporation losses up to December 31, 2025 (personal communication with Desiree Bravo, SLOFCWCD, on February 17, 2026).
3 District can supply 100% of the requested delivery to meet requests that exceed the 2025 DWR Table A allocation of 50%. Full contract water of 1,240 AF and 750 AF was available for Pismo Beach and OCSD, respectively(personal communication with Wes Thomson, SLOFCWCD, on February 25, 2026). 4 SWP Carryover water in January 2025 for all subcontractors in the District was 6,294 AF (personal communication with Wes Thomson, SLOFCWCD, on February 20, 2026). As of 2024, all SWP carryover water is combined for the District’s use as a whole. Any agency can use SWP carryover water out of the 6,294 AF pool. 5 There was no stored SWP in 2025 for Pismo Beach or OCSD (personal communication with Desiree Bravo, SLOFCWCD, on February 25, 2026).

AF = acre-feet OCSD = Oceano Community Services District SWP = California State Water Project

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4.2 Water Use
Water use refers to the total amount of water used to satisfy the needs of all water user groups. In the NCMA, water use predominantly serves urban production and agricultural applied water; a relatively small component of rural domestic use, including small community water systems; and domestic, recreational, and agriculturerelated businesses.

4.2.1 Agricultural Water Supply Requirements
For the 2025 Annual Report, the applied irrigation demand estimations were updated using the 2015 Integrated Water Flow Model (IWFM) Demand Calculator (IDC). The IDC is a stand-alone program that simulates land surface and root zone flow processes, and, importantly for this report, the agricultural water supply requirements for each crop type. IDC applies user-specified soil, weather, and land-use data to estimate and track the soil moisture balances. More specifically, available water within the root zone is tracked for each of the crops to simulate when irrigation events take place based on crop requirements and cultural irrigation practices. The data used in the IDC program for NCMA along with their respective sources are described below:
ƒ Land-use Information. The San Luis Obispo County Agricultural Commissioner’s Office compiles an annual estimate of irrigated acres in the County. A view displaying the irrigated agricultural lands within NCMA for 2025 is shown in Figure 26. The 2025 survey indicates a total of 1,460 acres of irrigated agriculture in the NCMA, consisting predominantly of rotational crops. Table 10, lists the crop types and acreages found in the NCMA that were used in the IDC program.
ƒ Climate Data. The 2025 weather data from the SLOFCWCD rain gauge in Oceano and the CIMIS Nipomo Station were used for precipitation and data related to reference ET values, respectively. The data needed to calculate reference ET values include solar radiation, humidity, air temperature, and wind speed. Both weather stations are shown in Figure 6.
ƒ ET Values by Crop Category. The DWR Consumptive Use Program (CUP) was used to estimate potential ET values based on specific annual climate data and crop type. The CUP used monthly climate data from the closest CIMIS station (Nipomo station) and applied crop coefficients to calculate ET values for the irrigated crop categories.

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Assumptions used in the analysis include the following:
ƒ As the NCMA is located near the coast, agricultural practices are influenced significantly by the marine layer, a mass of air that may be of lower temperature and have higher humidity than air over inland areas.

As seen in Figure 6, the Nipomo CIMIS station used for climatological data in both the CUP and IDC is located farther inland than the easternmost boundary of NCMA, and the recorded weather data does not fully account for the cooling and moisture effects of the marine layer. ƒ Use of an unadjusted calculated ET value results in a higher ET value than is taking place in the NCMA.

Studies26 have identified that ET values within the influence of the marine layer can be as much as 20 to 25 percent lower than ET values for the same crop located just outside of the marine layer influence. The distance the marine layer extends inland can vary from less than one-half mile to as much as 4 to 5 miles, depending on land topography. Low-lying areas have a higher frequency of marine layer coverage for longer periods throughout the day.
ƒ The NCMA is considered a low-lying area with boundaries extending between 2 and 5 miles inland.

Recognizing that not all the crops would be affected by the marine layer, but accounting for the cooling influence over some of the area, monthly ET values calculated based on the CIMIS Nipomo Station data were adjusted lower by 12 percent27 and are shown in Table 10. ƒ Soil Data. The Natural Resources Conservation Service Soil Survey Geographic Database was used to collect soil parameters in the NCMA for use in the IDC. The soil properties used include saturated hydraulic conductivity, porosity, and runoff curve numbers. The field capacity and wilting points were developed on the basis of the described soil textures (i.e., sand, loam, sandy clay) and industry standards. The IDC relies on soil properties for estimating water storage, deep percolation, and runoff; all of which lead to a refined estimation of applied water.

Table 10. NCMA Crop Acreages and Calculated Evapotranspiration, 2025 Crop Type Acreage 2025 Potential ET1
(AF/Acre)
Rotational Crops 1,305 2.162
Strawberries 113 1.76
Avocados 43 2.15
Notes
1 See ET Values by Crop Category, in the text section above. 2 Rotational crop ET is based on a rotation of two to three crops.

AF = acre-feet ET = evapotranspiration NCMA = Northern Cities Management Area 26 Irrigation Training and Research Center <http://www.itrc.org/etdata/etmain.htm> (Cal Poly, 2019) provides typical-year (1997 Hydrology) ET values using various irrigation methods for Zone 3, the coastal outside marine layer; and Zone 1, the marine layer. The computed percentage reduction in ET to Zone 3 values range from 11 percent for rotational crops (small vegetables) to 19 percent for strawberries. 27 A single ET reduction value is used based on changing location and rotation of crop types relative to influence of marine layer.

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Model Development and Computations
The IDC is written in FORTRAN 2003 using an object-oriented programming approach. The program consists of three main components: (1) input data files, (2) output data files, and (3) the numerical engine that reads data from input files, computes applied water demands, routes water through the root zone, and exports the results to the output files. The flow terms used in the root zone routing are defined in Table 11, and shown in the graphic below the table. Drainage from ponded areas (Dr) was not applicable because there are no ponded crops in the NCMA; data related to generic soil moisture (G) were not available.

Table 11. Flow Terms Used in Root Zone Routing for IDC Model Abbreviation Term Notes
P Precipitation User Specified
ET Evapotranspiration IDC Output
G Generic source of moisture (i.e., fog, dew) Data Not Available Aw Applied water IDC Output
Dr Outflow resulting from drainage of ponded
areas (e.g., rice, refuges) Not Applicable
RP Direct runoff IDC Output
Rf Return flow User Specified (fraction of applied water) U Re-used portion of return flow User Specified (fraction of return flow) D Deep percolation IDC Output
Note
Integrated Water Flow Model (IWFM) Demand Calculator (IDC) (DWR, 2016) Source: DWR (2016).

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All extracted geospatial information was applied to a computational grid within the IDC framework to simulate the root zone moisture for 2025 in NCMA agricultural areas. The IDC provides the total water supply requirement for each crop category met through rainfall and applied irrigation water in agricultural areas based on user-defined parameters for crop evaporation and transpiration requirements, climate conditions, soil properties, and agricultural management practices. The sources for data related to crop demands (i.e., potential ET), climate conditions, and soil properties are discussed above. The computations for actual crop ET (versus potential ET), applied water, and deep percolation are described below.

The potential ET is the amount of water a given crop will consume through evaporation and/or transpiration under ideal conditions (i.e., fully irrigated 100 percent of the time). Fully irrigated conditions mean that the water required to meet all crop demands is available. Water is available to the crops when the soil moisture content within the root zone is between the field capacity and the wilting point. When the soil moisture is above the field capacity, some water will go to runoff and/or deep percolation; when the soil moisture is below the wilting point, it is contained in the smallest pore spaces within the root zone and considered unavailable to the crops.

The difference between the field capacity and the wilting point is the Total Available Water. In IDC, when the soil moisture is above one-half of the Total Available Water, the crop ET will be equal to the potential ET.

However, if the soil moisture is below one-half of the Total Available Water, the plants will experience water stress, and ET decreases linearly until it reaches zero at the wilting point. This method of simulating water stress is similar to the method described in Allen et al. (1998) to compute non-standard crop ET under water stress conditions.

The IDC monitors the moisture content within the root zone and applies water by triggering an irrigation event when the calculated soil moisture is below a user-specified minimum allowable soil moisture requirement. For this application of the IDC, the minimum soil moisture requirement was set to trigger an irrigation event when the soil moisture fell below one-half the Total Available Water to limit water stress in the crops. During an irrigation event, the soil moisture content in the root zone reaches field capacity. If precipitation occurs, soil moisture may increase above field capacity, generating deep percolation and potentially runoff, both depending on the quantity and temporal distribution of rainfall.

Deep percolation is the vertical movement of water through the soil column flowing out of the root zone, resulting in the potential for groundwater recharge. The IDC applies the van Genuchten-Mualem equation (Mualem, 1976; van Genuchten, 1985) to compute deep percolation using the user-defined saturated hydraulic conductivity and pore size distribution.

Results
The total agricultural water supply requirement for 2025 was estimated to be 2,447 AF, and the effective precipitation (i.e., rainwater used by the crop) was 557 AF. Precipitation totaled 14.12 inches during 2025, with the most precipitation occurring in November (4.13 inches) and December (3.01 inches), which reduced the need for early-season irrigation. This was slightly lower than 2024, which received 15.43 inches of precipitation. The reduction in rainfall led to less moisture stored in the soil following winter and early-spring, decreasing its ability to satisfy crop water demand and increasing reliance on irrigation in the summer months.

Figure 27 illustrates the estimated crop water requirement in the NCMA as calculated by the IDC and displays the three identified crop types and their estimated monthly applied water. The rotational crops have the highest water supply requirements because they cover the greatest area (see Figure 26) and have the greatest annual ET (Table 12).

The area-weighted average applied water for NCMA in 2025 was 1.68 AF per acre, aligning with previous estimates and expected trends based on ET demand and crop water requirements. The Irrigation Efficiency for 2025 was estimated as the sum of the ET of applied water over the sum of applied water. The overall irrigation efficiency for the area is 88 percent.

),*85(
205 ESTIMATED AGRICULTURAL WATER DEMAND AND MONTHLY PRECIPITATION AT 7+(6/212 *$8*(
Northern Cities Management Area
San Luis Obispo County, California

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Annual Monitoring ReportGSI Water Solutions, Inc. 75 Table 12. IDC Model Results of Monthly Applied Water, 2025 Monthly Applied Water (AF)
Annual Total (AF)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Rotational Crops -- -- -- 488 498 427 441 406 -- 3 -- -- 2,262 Strawberries -- -- -- 12 13 27 27 30 15 4 -- -- 129
Avocados -- 5 -- 7 10 10 10 10 6 -- -- -- 57
Total 0 5 0 507 521 464 478 446 21 7 0 0 2,447
Monthly Precipitation (inches) Annual Total
(inches) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Precipitation 0.20 1.73 2.74 0.53 0.00 0.02 0.00 0.00 0.55 1.21 4.13 3.01 14.12 Monthly Unit Water Demand (AF/Acre) Annual Total
(AF/acre) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Rotational Crops --- --- --- 0.37 0.38 0.33 0.34 0.31 0.00 0.00 --- --- 1.73 Strawberries --- --- --- 0.11 0.12 0.24 0.24 0.26 0.14 0.03 --- --- 1.14 Avocados --- 0.11 0.00 0.17 0.24 0.22 0.22 0.24 0.13 0.00 --- --- 1.33 Area Weighted Average 0.00 0.00 0.00 0.35 0.36 0.32 0.33 0.31 0.01 0.00 0.00 0.00 1.68 Notes — = not applicable AF = acre-feet AF/acre = acre-feet per acre

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4.2.2 Rural Use
In the NCMA, rural water use refers to groundwater pumping not designated as urban use or agricultural irrigation applied water and includes small community water systems, individual domestic water systems, recreational uses, and agriculture-related business systems. Small community water systems using groundwater in the NCMA were identified initially through a review of a list of water purveyors compiled in the 2007 County IRWMP. These include the Halcyon Water System, Ken Mar Gardens, and Pacific Dunes RV Resort. The Halcyon Water System serves 35 homes in the community of Halcyon, and Ken Mar Gardens provides water supply to 48 mobile homes on South Halcyon Road. The Pacific Dunes RV Resort, with 215 RV sites, provides water supply to a largely transitory population and a nearby riding stable. In addition, an inspection of aerial photographs of rural areas within NCMA has identified about 25 homes and businesses that are served by private wells. Two mobile home communities, Grande Mobile and Halcyon Estates, are served by OCSD through the distribution system of Arroyo Grande. Therefore, the production summary of OCSD includes these two communities. Based on prior reports, it is assumed that the number of private wells is negligible within the service areas of the NCMA agencies.

The Pismo Beach Golf Course uses an on-site water well for turf irrigation. The pumped water is not metered, and the golf course operators do not know the total water use. An estimate of water demand for the golf course is based on the irrigated acreage, sandy soils, near-ocean climate, and water duty factors from the U.S. Golf Association, Alliance for Water Efficiency, U.S. Golf Courses Organization of America, and several other sources. The estimated rural water demand is provided in Table 13.

Table 13. Estimated Rural Water Production, 2025
Groundwater User No. of Units
Estimated Water
Production,
AFY per Unit
Estimated Annual
Water Production
(AF)
Halcyon Water System1 35 0.4 14
Ken Mar Gardens2 48 — 4.5
Pacific Dunes RV Resort3 215 0.03 6.5
Pismo Beach Golf Course4 — — 45
Rural Users1 25 0.4 10
Current Estimated Rural Production 80
Notes
1 Rural residential water use is assumed to include minor outdoor irrigation and is estimated at 0.4 AFY per unit. 2 Demand based on metered water usage. Total volume pumped per personal communication with Shane Taylor, City of Arroyo Grande, on February 17, 2026.
3 Water use/unit assumes 50 percent annual occupancy and 0.06 AFY per occupied site. 4 Estimated golf course demand, based on estimated water duty factor, annual ET, and irrigated acreage. — = not applicable AF=acre feet
AFY = acre-feet per year ET = evapotranspiration

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4.2.3 Urban Production for Potable Use
Urban water production for potable use is presented in Table 14, for each of the NCMA agencies from 2005 through 2025. These values reflect Lopez Lake deliveries, SWP deliveries, groundwater production data, and system losses, and represent all water used within the service areas of the four NCMA agencies. In the last 21 years, urban water production has ranged from 5,240 AF (2023) to 8,982 AF (2007). There has been an overall decline in urban production since 2007. The long-term declining trend in production was likely initially attributed to the relatively slow economy from 2009 through 2012, then subsequently to conservation activities implemented by the NCMA agencies in response to drought conditions. Urban water production was 5,477 AF in 2025, approximately 69 percent of the urban groundwater production in 2013 (see Table 14, Note 1).

Table 14. Historical Urban Water Production for Potable Use (Groundwater and Surface Water) Year Arroyo
Grande
Grover
Beach
Pismo
Beach
OCSD Total
Urban1
Percentage of 2013
Production2
2005 3,460 2,082 2,142 931 8,615 —
2006 3,425 2,025 2,121 882 8,453 —
2007 3,690 2,087 2,261 944 8,982 —
2008 3,579 2,051 2,208 933 8,771 —
2009 3,315 1,941 2,039 885 8,180 —
2010 2,956 1,787 1,944 855 7,542 —
2011 2,922 1,787 1,912 852 7,473 —
2012 3,022 1,757 2,029 838 7,646 —
2013 3,111 1,792 2,148 888 7,939 —
2014 2,752 1,347 1,949 807 6,856 —
2015 2,239 1,265 1,736 703 5,943 75%
2016 1,948 1,210 1,646 672 5,476 69%
2017 2,194 1,248 1,700 718 5,860 74%
2018 2,212 1,221 1,720 725 5,878 74%
2019 2,139 1,193 1,648 680 5,660 71%
2020 2,317 1,289 1,777 743 6,126 77%
2021 2,307 1,277 1,771 718 6,073 76%
2022 1,990 1,205 1,632 644 5,471 69%
2023 1,936 1,166 1,509 629 5,240 66%
2024 2,024 1,227 1,494 611 5,356 67%
2025 2,070 1,226 1,545 636 5,477 69%
Notes
1 As a result of rounding, totals may not correspond exactly to the sum of all figures shown. 2 On April 1, 2015, California Governor Jerry Brown issued an executive order (B29-2015) mandating statewide reductions in water use. The order directs the State Water Resources Control Board to implement mandatory water reductions in cities and towns across California to reduce water usage by 25 percent, compared to the amount used in 2013, through February 2016. All units in acre-feet (AF)
— = not applicable AF = acre-feet OCSD = Oceano Community Services District

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4.2.4 2025 Groundwater Pumpage
Total SMRVGB groundwater production in the NCMA, including urban production, applied agricultural water requirements, and rural pumping, is shown in Table 15. The total estimated SMRVGB groundwater pumpage in the NCMA in 2025 was 3,377 AF, which represents an increase of 428 AF from 2024 (2,949 AF).

Table 15. NCMA Groundwater Pumpage from Santa Maria River Valley Groundwater Basin, 2025 (AF) Agency
Groundwater
Entitlement + Ag
Conversion Credit
(AF)
2025 Groundwater
Use from SMRVGB
(AF)
Percent Pumped of
Groundwater
Entitlement
Arroyo Grande 1,202 + 121 = 1,323 179 14%
Grover Beach 1,198 + 209 = 1,407 519 37%
Pismo Beach 700 36 5%
OCSD 900 67 7%
Total Urban Groundwater
Entitlement /Use 4,000 + 330 = 4,330 801 18%
Agricultural Irrigation Applied
Water 5,300 - 330 = 4,970 2,447 49%
Non-potable Applied Irrigation
Water (Arroyo Grande)1 — 49 —
Rural Water Users — 80 —
Estimated Subsurface Outflow
to Ocean (2002 Groundwater
Management Agreement)
200 — —
Total NCMA Groundwater
Entitlement /Use 9,500 3,377 36%
Notes
— = not applicable AF = acre-feet Ag = agriculture NCMA = Northern Cities Management Area OCSD = Oceano Community Services District SWRVGB = Santa Maria River Valley Groundwater Basin 1 Arroyo Grande pumped 48.6 AF of applied water irrigation from its non-potable well in 2025 (personal communication with Shane Taylor, Utilities Manager, on February 17, 2026).

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The total estimated groundwater pumpage of 3,377 AF in 2025 represents about 36 percent of the calculated safe yield of 9,500 AFY for the NCMA portion of the SMRVGB.

A graphical depiction of water use by supply source for each NCMA agency since 2000 is presented as Figure 28. The graphs depict changes in water supply availability and use over time. The increased dependence on Lopez Lake in 2017, 2018, 2019, and 2020 is illustrated in this graphic. With reduced access to Lopez Lake water in 2021 and 2022, OCSD and the City of Pismo Beach utilized a greater percentage of SWP water during that time. Although all four agencies pumped groundwater as part of their supply portfolios in 2025, groundwater pumped from the SMRVGB constituted a minor part of the overall water supply, an amount of 850 AF28 or 16 percent of overall NCMA use29. 28 This total includes the 801 AF pumped by NCMA agencies and the 49 AF of non-potable irrigation production in Arroyo Grande.
29 Total water use includes potable and non-potable groundwater extraction from all four NCMA agencies, surface water from Lopez Lake, and SWP water. 2025 total water use equals 5,477 AF.

),*85(MUNICIPAL WATER USE BY SOURCE
Northern Cities Management Area
San Luis Obispo County, California
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As shown in Figure 29, groundwater pumpage reached a peak in 2007 and then declined in 2008, 2009, and 2010. From 2010 through 2013, pumpage increased slightly every year, but overall groundwater use remained significantly lower than previous annual pumpage rates. Annual pumping totals have generally been decreasing since 2013. In 2025, urban potable groundwater use was 801 AF, which is 18 percent of the 4,330 AF of combined urban groundwater entitlement and agricultural conversion credit.

4.2.5 Changes in Water Production
Historical water use for urban uses, agricultural irrigation, and rural uses is shown in Table 16.

Table 16. Historical Total Water Use (Groundwater and Surface Water, AF) Year Arroyo
Grande
Grover
Beach
Pismo
Beach OCSD Total Urban1
Agricultural
Irrigation2
Rural
Water Total Use1
2005 3,460 2,082 2,142 931 8,615 2,056 36 10,707
2006 3,425 2,025 2,121 882 8,453 2,056 36 10,545
2007 3,690 2,087 2,261 944 8,982 2,742 36 11,760
2008 3,579 2,051 2,208 933 8,771 2,742 36 11,549
2009 3,315 1,941 2,039 885 8,180 2,742 36 10,958
2010 2,956 1,787 1,944 855 7,542 2,056 38 9,636
2011 2,922 1,787 1,912 852 7,473 2,742 38 10,253
2012 3,022 1,757 2,029 838 7,646 2,742 41 10,429
2013 3,111 1,792 2,148 888 7,939 2,742 42 10,722
2014 2,752 1,347 1,949 807 6,855 2,955 38 9,848
2015 2,239 1,266 1,736 703 5,943 3,008 38 8,990
2016 1,948 1,210 1,646 672 5,476 2,551 81 8,108
2017 2,194 1,248 1,700 718 5,860 2,579 80 8,519
2018 2,212 1,221 1,720 725 5,878 2,713 81 8,672
2019 2,139 1,193 1,648 680 5,660 2,554 82 8,296
2020 2,317 1,289 1,777 743 6,126 2,369 82 8,577
2021 2,307 1,277 1,771 718 6,073 2,503 82 8,658
2022 1,990 1,205 1,632 644 5,471 2,614 80 8,165
2023 1,936 1,166 1,509 629 5,240 2,083 80 7,403
2024 2,024 1,227 1,494 611 5,356 2,347 80 7,783
2025 2,070 1,226 1,545 636 5,477 2,496 80 8,053
Notes
1 As a result of rounding, totals do not correspond to the sum of all figures shown. 2 Irrigation-applied water includes agricultural irrigation plus SMRVGB non-potable irrigation by Arroyo Grande.

AF = acre-feet OCSD = Oceano Community Services District SMRVGB = Santa Maria River Valley Groundwater Basin

FIGURE 29. HISTORICAL TDS, CHLORIDE AND SODIUM, INDEX WELLS AND 30N03 Northern Cities Management Area
San Luis Obispo County, California
1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 0 500
2,5002,0001,5001,000
TDS, mg/L
0 80604020
200180160140120100
Chloride, mg/L
0 8040
280240200160120
Sodium, mg/L
\\GSICLOUD\Projects\672-Northern Cities Management Area\_Grapher Figures\Annual Rpt Figs\2025 Annual Report 20260130 Fig 29 NCMA TDS, Cl and Sodium Index Wells and 30N03 30N02 Chloride
>600 mg/l
in 2009
Notes:TDS - total dissolved solidsmg/L - milligrams per liter

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In general, urban water production has ranged from a high of 8,982 AF in 2007 (Table 16) to a low of 5,240 AF in 2023. Total water use since 2007 has been on a general downward trend; this overall decline in water use can be attributed to conservation activities implemented by the NCMA agencies in response to drought. 2025 urban water use was 5,477 AF in 2025. This may be attributed to conservation mechanisms already in place.

In the agricultural irrigation category, agricultural acreage has remained stable. Thus, the variance in annual applied water for agricultural irrigation is mostly dependent on climatic conditions. Acknowledging the variability caused by climatic conditions, agricultural irrigation-applied water is not expected to change significantly, given the relative stability of applied irrigation acreage and cropping patterns in the NCMA south of Arroyo Grande Creek.

Similarly, no significant changes in rural domestic pumping are assumed to have occurred.

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SECTION 5: Comparison of Water Supply and Water Production The Baseline Available Urban Water Supplies for each of the NCMA agencies is 10,765 AFY, assuming 100 percent delivery of SWP allocation and assuming no Lopez Lake Surplus or Stored water, or SWP carryover or Stored SWP water (Table 8). In 2025, despite the 50 percent SWP Table A allocation set by the DWR, 100 percent of SWP allocation was available to agencies in the SLOFCWCD. In addition, Lopez Lake Surplus water and SWP carryover water were available to the agencies. The total available urban water supply in 2025 was 13,338 AF (Table 9), not including the 6,294 AF of SWP carryover water available to split amongst all agencies in the SLOFCWCD.

As described in the 2002 Groundwater Management Agreement and affirmed in the 2002 Settlement Agreement, the calculated safe yield from the NCMA portion of the SMRVGB is 9,500 AFY (Table 8, and Table 15). Because all agricultural irrigation water use is supplied by groundwater, the total available agricultural irrigation supply is a portion of the estimated safe yield; this portion was allocated as 5,300 AFY for agricultural and rural use. The agricultural conversion of 330 AFY reduces this allocation to 4,970 AFY. Of the estimated safe yield of 9,500 AFY, other than what is allocated for agricultural irrigation and rural use, the remaining 4,330 AFY is allocated for urban water use (4,330 AFY, including 4,000 AFY groundwater allocation plus 330 AFY in agricultural conversion credit) and an estimated 200 AFY for subsurface outflow to the ocean.

In 2025, the total estimated NCMA water production was 8,053 AF (Table 17). The 2025 water production of each city and agency is shown by source in Table 17. Note that the production volumes described here are gross production (if pumped groundwater) and gross deliveries (if surface water deliveries) and equal net consumptive demand plus losses and return water.

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Table 17. Water Production by Source, 2025 (AF)
Agency Lopez
Lake1
State
Water
Project2
SMRVGB
Groundwater
Other
Supplies3 Total
Urban Area
Arroyo Grande 1,891 - 179 0 2,070
Grover Beach 708 - 519 0 1,226
Pismo Beach 1,022 486 36 0 1,545
OCSD 473 95 67 0 636
Urban Water Use
Total 4,095 581 801 0 5,477
Non-Urban Area
Agricultural Irrigation
Applied Water 0 0 2,447 0 2,447
Rural Water Users 0 0 80 0 80
Non-potable Applied
Irrigation Water
(Arroyo Grande)
0 0 49 0 49
Total 4,095 581 3,377 0 8,053
Notes
1 The category “Lopez Lake” includes Entitlement Use, and Non-Entitlement Use (Stored Water, Surplus Water, Deliveries during Spill, and Deliveries during District Initiated Exchange [DIE]). There was no spilled water in 2025. 2 The category “State Water Project” includes Used Allocations and District-Initiated Exchange [DIE] Storage water. 3 The category “Other Supplies” includes groundwater pumped from outside the NCMA boundaries.

AF = acre-feet NCMA = Northern Cities Management Area
OCSD = Oceano Community Services District SMRVGB = Santa Maria River Valley Groundwater Basin As shown in Table 17, water for urban use in 2025 was supplied to the NCMA from 4,095 AF of Lopez Lake water, 581 AF of SWP water, and 801 AF of potable groundwater. Arroyo Grande produced 0 AF from its Pismo Formation wells in 2025.

Based on the calculated yield of the NCMA portion of the SMRVGB, the baseline, or full allocation, of total available supply for all uses is 15,735 AFY, which is the sum of 10,765 AFY for urban use plus the allocation for agricultural irrigation and rural area of 4,970 AFY. In 2025, factoring in the SWP delivery schedule, the total available supply for all users was 13,338 AF (Table 9) compared with the actual 2025 NCMA water use of 8,053 AF (Table 17). It must be noted, however, that this comparative review of the available 2025 supply versus production must be viewed with caution because of the potential threats to the groundwater supply (see Section 6.1). As described earlier, the NCMA agencies pumped only 18 percent of their “available” groundwater entitlement. Based on available data, the NCMA agencies could not have used their entire groundwater entitlement in 2025 without lowering groundwater elevations and offsetting the welcome gains in groundwater in storage (see Section 3.2).

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SECTION 6: Threats to Water Supply
Because the NCMA agencies depend on both local and imported water supplies, changes in either state-wide or local conditions can threaten the NCMA water supply. Water supply imported from other areas of the state may be threatened by state-wide drought, effects of climate change in the SWP source area, management and environmental protection issues in the Delta that affect the amount and reliability of SWP deliveries, and risk of seismic damage to the SWP delivery system. Local threats to the NCMA water supply similarly include extended drought and climate change that may affect the yield from Lopez Lake and reduced recharge to the NCMA. In addition, the NCMA is not hydrogeologically isolated from the NMMA and the rest of the SMRVGB, and water supply threats in the NMMA are a potential threat to the water supply sustainability of the NCMA.

There is a potential impact from seawater intrusion if the groundwater system, including the entire SMRVGB, is not adequately monitored and managed. In particular, management of the SMRVGB may need to account for sea level rise and the relative change in groundwater gradient along the shoreline.

6.1 Threats to Local Groundwater Supply

6.1.1 Declining Water Levels
Before 2023, water levels in the NCMA portion of the SMRVGB exhibited an overall declining trend for many years. Important factors for maintaining water levels are managing inflow and outflow to the aquifer.

Inflow: An important inflow component to the NCMA area is subsurface inflow into the aquifers that supply water wells serving the NCMA. Historically, subsurface inflow to the NCMA from the Nipomo Mesa along the southeast boundary of the NCMA has been a primary component of groundwater recharge. This inflow is reduced from historical levels, as first recognized in 2008–2009, to “something approaching no subsurface flow” because of lower groundwater levels in the NMMA (NMMA 2nd Annual Report CY 2009, page 43) (NMMA, 2010). This condition continues, as described in all subsequent NMMA annual reports.

Figure 31 displays the published fall 2024 groundwater elevation contours for NCMA and NMMA from the respective Annual Reports. (Because NCMA and NMMA prepare their Annual Reports at the same time, 2025 water levels to evaluate combined groundwater elevation contours across both management areas are not available at the time of report preparation; 2025 conditions will be assessed in the 2026 Annual Report). Figure 31 displays a large area of depressed groundwater elevations from 0 to 10 feet elevation in the NMMA area immediately east of the southern portion of NCMA. This indicates a depression in the groundwater surface that prevents recharge from supplying the aquifer beneath NCMA. ƒ Outflow: A major outflow component is groundwater pumpage. Total SMRVGB groundwater pumping in the NCMA (urban, agricultural, and rural domestic) was 3,377 AF in 2025 (see Table 7), which is 36 percent of the court-accepted 9,500 AF safe yield of the NCMA portion of the SMRVGB. However, the safe yield allotment for agricultural irrigation is significantly higher than the actual historical agricultural irrigation demand. Despite groundwater pumping occurring at 30 to 40 percent of the safe yield for the past decade, and the occurrence of above-average precipitation years, groundwater elevations do not indicate a corresponding chronic upward trend.























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Before 2023, recent drought conditions had resulted in a generally steady decline in groundwater storage in the NCMA portion of the SMRVGB. Although above-average precipitation was received in 2023 and 2024, resulting in increased groundwater levels and a positive change in groundwater in storage, reduced groundwater recharge could return the NCMA to a state of declining groundwater levels, which could be exacerbated if the NCMA agencies are required to increase groundwater withdrawals because of a reduction or total loss in local surface water supplies or SWP deliveries.

6.1.2 Seawater Intrusion
The NCMA is underlain by an accumulation of alluvial materials that slope gently offshore and extend for many miles under the ocean (DWR, 1970, 1975). Coarser materials within the alluvial materials comprise aquifer zones that receive freshwater recharge in areas above sea level. If sufficient outflow from the aquifer occurs, the dynamic interface between seawater and freshwater will be prevented from moving onshore. Sufficient differential pressure to maintain a net outflow is indicated by onshore groundwater elevations that are above mean sea level and establish a seaward gradient to maintain that outflow.

The 2008 NCMA Annual Report documented that a portion of the aquifer underlying the NCMA exhibited water surface elevations below 0.0 feet NAVD 88 (NCMA, 2008). Hydrographs for NCMA sentry wells and the DWI (Figure 12) show that coastal groundwater elevations were at relatively low levels for as long as 2 years during that time. Such sustained low levels had not occurred previously in the historical record and reflected the impact of drought and pumping on groundwater levels. The low coastal groundwater levels indicated a potential for seawater intrusion.

Elevated concentrations of TDS, chloride, and sodium were observed in wells 30N03 and 30N02 beginning in May 2009, indicating incipient seawater intrusion (Figure 31, Figure 32,and Figure 12). OCSD MW-Blue also showed elevated concentrations of TDS and chlorides, but a concurrent decline in sodium (Figure 32).

Concentrations of TDS, chloride, and sodium recovered to historical levels in wells 30N03 and 30N02 (one of the sentry wells comprising the DWI) by April 2010. Comparing well 30N02 to the other DWI wells, the other DWI wells showed no elevated concentrations during the same period. However, comparing well 30N02 to wells with similar screen elevations (Figure 4), wells 36L01 (approximately 12,000 feet south of well 30N02) and the OCSD MW-Blue well, approximately 3,300 feet east-southeast of well 30N02, suggested that seawater intrusion perhaps progressed eastward as far as the OCSD MW-Blue well, but not as far south as well 36L01 (Figure 32). While the TDS and chloride concentrations were elevated from August 2009 to July 2011 in the OCSD MW-Blue well, the sodium concentrations remained within historical levels. During the same period, TDS, chloride, and sodium concentrations remained relatively stable in well 36L01.

During 2025, there were no indications of seawater intrusion from data and samples collected from the Sentry wells.

FIGURE 3. HISTORICAL TDS, CHLORIDE AND SODIUM, WELLS 30N02, MW-BLUE AND 36L01 Northern Cities Management Area
San Luis Obispo County, California
1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 0 500
2,5002,0001,5001,000
TDS, mg/L
0 80604020
200180160140120100
Chloride, mg/L
0 8040
280240200160120
Sodium, mg/L
Well 30N02 (Paso Robles Formation)Well 31H11 (Blue; Paso Robles Formation)Well 36L01 (Paso Robles Formation) \\GSICLOUD\Projects\672-Northern Cities Management Area\_Grapher Figures\Annual Rpt Figs\2025 Annual Report 20260130 Fig 30 NCMA TDS, Cl and Sodium Wells 30N02 MW-Blue and 36L01_v2 Notes:TDS - total dissolved solidsmg/L - milligrams per liter 31H11 Chloride
1,000 mg/l
in 2009

),*85(TOTAL WATER USE (URBAN, RURAL, AG5,&8/785$/) BY SOURCE Northern Cities Management Area
San Luis Obispo County, California
3 ?1RUWKHUQ&LWLHV0DQDJHPHQW$UHD?1&0$0XQL3XPSLQJ Notes:&zͲĐƌĞͲĨĞĞƚƉĞƌLJĞĂƌ^tWͲĂůŝĨŽƌŶŝĂ^ƚĂƚĞtĂƚĞƌWƌŽũĞĐƚ

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Measures to Avoid Seawater Intrusion
In recognition of the risk of seawater intrusion, the NCMA agencies have developed and implemented a water quality monitoring program for the sentry wells and OCSD observation wells. The NCMA agencies and SLOFCWCD have worked cooperatively toward the protection of the sentry wells as long-term monitoring sites.

Several measures are employed by the NCMA agencies to reduce the potential for seawater intrusion.

Specifically, the NCMA agencies have voluntarily reduced coastal groundwater pumping; decreased overall water use via conservation; and initiated plans, studies, and institutional arrangements to secure additional surface water supplies. As a result, each of the four major municipal water users in the NCMA reduced groundwater use between 25 and 95 percent during the past several years. In 2025, potable municipal groundwater use was 801 AF, which constitutes 18 percent of the urban users’ groundwater entitlement (including agricultural conversion credits) of the safe yield (Table 7).

According to the DWR Bulletin 63-3 report (DWR, 1970), both the Paso Robles Formation aquifer and the lower confined portion of the Cienega Valley alluvial aquifer are recharged primarily from subsurface groundwater inflow from the east, where the overlying confining layers are thin to nonexistent (DWR, 1970). These recharge areas to the east include inland reaches of Arroyo Grande Valley and portions of Nipomo Mesa (DWR, 1970).

Any action that results in reduced groundwater recharge, whether it is from drought or reduction of subsurface inflow from the north and east, reduces overall recharge to the groundwater basin, lowers the gradient (or head) of the groundwater near the shoreline, and reduces subsurface outflow to the ocean, thereby increasing the potential threat of seawater intrusion. Alternatively, any action that results in increased groundwater recharge lessens the threat of seawater intrusion.

Central Coast Blue is a regional recycled water project with original partner agencies consisting of Arroyo Grande, Grover Beach, and Pismo Beach, with Pismo Beach serving as the lead agency. The project is intended to develop a sustainable, drought-resilient water supply and help protect the SMRVGB. On March 18, 2024, the CCBRRWA Board of Directors received an update on project costs, funding, and financing for the proposed Central Coast Blue Project. Significant increases in project costs, a loss of state grant funding, and improvements in local water supply conditions have prompted Arroyo Grande and Grover Beach to withdraw from the Central Coast Blue Project as originally conceived in 2024. The City of Pismo Beach remains committed to a recycled water project, and with the project’s consulting engineers are exploring a smaller Phase 1 of the program that would reduce Project costs, and leaders are advocating to secure additional grants.

In 2020, the Nipomo Community Services District (NCSD) asked the NCMA agencies for a letter in support of an appeal to the Santa Barbara County Board of Supervisors to remove the 3,000 AFY volume limitation in the NCSD waterline intertie license agreement. NCSD has designed and constructed a pipeline for the Nipomo Supplemental Water30 project (Supplemental Water Project) that is sized to accommodate the delivery of 6,200 AFY as provided for in the Stipulation and Judgment. It is NCSD’s contention that the 3,000 AFY limitation in the license agreement is arbitrary, serves no purpose, and is in violation of Santa Barbara County’s obligations under the Stipulation and Judgment to support, and not oppose, implementation of the Adjudication, including development of the Supplemental Water Project. Further, the limitation threatens the long-term sustainability of the entire Basin. Completion of the Supplemental Water Project is intended to 30 As described in Section VI.A of the Stipulation; “The NCSD agrees to purchase and transmit to the [Nipomo Mesa Management Area] (NMMA) a minimum of 2,500 acre-feet of Nipomo Supplemental Water each Year. However, the NMMA Technical Group may require NCSD in any given Year to purchase and transmit to the NMMA an amount in excess of 2,500 acre-feet and up to the maximum amount of Nipomo Supplemental Water which the NCSD is entitled to receive under the MOU if the Technical Group concludes that such an amount is necessary to protect or sustain Groundwater supplies in the NMMA.”

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reduce groundwater pumping, increase subsurface inflow from Nipomo Mesa to the NCMA, and help protect the groundwater resource from seawater intrusion. The NCMA agencies supplied the requested letter of support to NCSD on February 19, 2021.

6.2 Threats to State Water Project Supply
Both extended drought and long-term reduction in snowpack from climate change can affect SWP deliveries.

The storage capacity levels of the state’s two largest reservoirs, Lake Shasta and Lake Oroville, were 76 percent and 70 percent capacity, respectively, at the start of 2025. Lake Shasta and Lake Oroville filled to full capacity by spring 2025. The DWR allowed 50 percent fulfillment of Table A allocations for 2025.

The calendar year rainfall total at the No. SLO 795 station for 2025 (14.12 inches) is considered to be a slightly below-average water year. Rainfall received during 2025 at County-monitored stations Arroyo Grande Creek (No. SLO 739) and Lopez Dam (No. SLO 737) were 16.78 and 23.45 inches, respectively.

The immediate threat of allocation reductions to Pismo Beach and OCSD, the only SWP subcontractors in the NCMA, has not significantly materialized during the past several years. The SLOFCWCD’s unsubscribed Table A entitlement provides a buffer, in addition to the agency’s drought buffer, so that contracted volumes to SWP subcontractors, such as the OCSD and Pismo Beach, may still be provided in full. However, the SWP supply has the potential to be affected by drought as well as environmental issues. Twenty-year projected climate change scenarios documented in DWR (2024) modeled the estimated average annual delivery of Table A water to be 13 percent to 22 percent lower than under existing conditions.

Subsidence in the San Joaquin Valley attributed to groundwater elevation declines and associated compaction of overlying clays has been documented. This subsidence has locally impacted hydraulic grade lines along canals that convey state water, thereby affecting the ability to convey water according to established operating plans for the canals and pump stations. DWR has adapted is operating criteria of the San Luis Canal and the California Aqueduct. Even with these adaptations, 2023 levels of subsidence reduce the long-term average delivery capability of the State Water Project by 3 percent. Without additional operational adaptations or infrastructure improvements, estimates predict that long-term average delivery capability of the State Water Project could be reduced by 18 to 87 percent by 2043.

6.3 Threats to Lopez Lake Water Supply
Despite the filling and subsequent spilling of Lopez Lake reservoir in 2023 and 2024, pre-2023 extended drought conditions contributed to recent record-low water levels in Lopez Lake. As discussed in Section 4.1.1, the Zone 3 agencies developed and implemented the LRRP in response to reduced water in storage in the lake in recent years. The LRRP is intended to reduce municipal diversions and downstream releases as water levels drop to preserve water within the reservoir for an extended drought. Water from Lopez Lake may be significantly reduced or unavailable to the Zone 3 agencies in the event of a prolonged future drought. Without access to water from Lopez Lake, the NCMA agencies and local agriculture stakeholders may be forced to rely more heavily on their groundwater supplies and increase pumping during extended drought conditions, which could result in lowering water levels in the aquifer and an increased threat from seawater intrusion. Moreover, a reduction in downstream releases from the reservoir, as mandated by the LRRP, likely will lead to reduced recharge to the NCMA portion of the SMRVGB and further contribute to declining groundwater levels.

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6.3.1 Environmental Litigation (San Luis Obispo Coastkeeper vs. County of San Luis Obispo)
In August 2024, a coalition of four environmental groups (San Luis Obispo Coastkeeper, Los Padres ForestWatch, California Coastkeeper Alliance, and Ecological Rights Foundation) filed a lawsuit alleging that the County, which operates the Lopez Project as SLOFCWCD Zone 3, is in violation of the ESA, and requested an increase of releases from the Lopez Dam to support steelhead populations, and to provide fish passage past the dam. In December 2024, U.S. District Judge Sherilyn Peace Garnett ordered a preliminary injunction that required the County to immediately increase downstream releases into Arroyo Grande Creek by about 45 percent to support fish habitat in the creek. This resulted in approximately 1,500 AF of additional water to be released from Lopez into Arroyo Grande Creek during 2025. The County appealed the ruling stating that an increase in downstream releases could impact other protected species, such as California red-legged frogs and tidewater goby, and also impact local water supply for 50,000 residents. On December 3, 2025, the U.S.

Court of Appeals for the Ninth Circuit ruled in favor of the County (SLO Co., 2025a). Shortly thereafter, the water release rate was returned to the release schedule as defined in the IDRS (SLO Co., 2007). The IDRS was prescribed in 2007 by the NMFS in coordination with the SLOFCWCD Zone 3 and the NCMA agencies, which purchase Lopez water. The IDRS is considered to be in compliance with the ESA until the Arroyo Grande Creek Habitat Conservation Plan is finalized. However, the case is still proceeding in court. If the original ruling were allowed to stand, it would result in significant negative impacts to the finances of the NCMA agencies and their ability to supply water to their customer base.

6.3.2 Wildfire Impacts
In August, 2025, the Gifford Fire burned 131,600 acres in the mountains of Santa Barbara and San Luis Obispo Counties. At its furthest extent, it burned the watersheds immediately east of the Upper Arroyo Grande Creek watershed, which drains into Lake Lopez. If the fire had jumped into the Arroyo Grande Creek watershed, or if (or when) a future wildfire burns in this watershed, there are potential risks associated with ash falling into the reservoir, tree falls or denuded sediments flowing into the reservoir. These have the potential to affect water quality in the reservoir, and potentially to affect operations at the treatment plant if the water released through the dam is impacted.

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SECTION 7: Management Activities
The NCMA and overlying private well users have actively managed surface water and groundwater resources in the area for more than 40 years. Management objectives and responsibilities were first established in the 1983 Gentlemen’s Agreement, recognized in the 2002 Groundwater Management Agreement, and affirmed in the 2002 Settlement Agreement. The responsibility and authority of the Northern Parties for NCMA groundwater management were formally established through the 2002 Settlement Agreement, 2005 Stipulation, and 2008 Judgment. Throughout the long history of collaborative management, which was formalized through the Agreement, Stipulation, and Judgment, the overall management goal for the NCMA agencies is to preserve the long-term integrity of water supplies in the NCMA portion of the SMRVGB.

7.1 Strategic Plan

7.1.1 Purpose and Background
An NCMA Strategic Plan was first developed in 2014 to provide the NCMA TG with a mission statement to guide future initiatives, provide a framework for identifying and communicating water resource planning goals and objectives, and formalize a 10-year work plan for implementation of those efforts (WSC, 2014). Several key objectives were identified related to enhancing water supply reliability, improving water resource management, and increasing effective public outreach. Several key strategies were identified by the TG for improving the sustainability of the water resource. Strategic initiatives were then developed for each key strategy. The TG then developed an implementation plan for the key strategies that include current, shortterm, and long-term time frames for initiatives that could be completed within 1 year, 5 years, and more than 5 years.

The 2014 Strategic Plan was updated in 2019–2020, and again over a series of strategic planning sessions in 2025. The updated Strategic Plan was completed in 2025 and presented to agency City Councils and Boards.

7.1.2 Mission Statement
Through the strategic planning process, the NCMA TG developed the following mission statement to guide ongoing initiatives and plan implementation and capture the requirements outlined in the 1983 Gentlemen’s Agreement, 2005 Stipulation, and the 2008 Judgment:

Preserve and enhance the sustainability, quality, and affordability of water supplies for the Northern Cities Area by:
ƒ Managing groundwater resources using science-based approaches ƒ Enhancing supply reliability
ƒ Advancing the legacy of cooperative water resources management ƒ Promoting adaptive management
ƒ Protecting water quality and supply through proactive monitoring ƒ Maintaining cost-effective water supplies

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7.1.3 Objectives of the NCMA TG
Through the strategic planning process, the NCMA TG identified several key objectives to guide future efforts.

These objectives include the following:

A. Enhance Water Supply Reliability
ƒ Develop coordinated response plan for seawater intrusion and other supply emergencies. ƒ Support implementation of projects and initiatives that increase water supply reliability. ƒ Prepare the Northern Cities for prolonged drought conditions. ƒ Adaptively manage pumping from the groundwater basin in response to changing conditions. ƒ Mitigate threats to groundwater sustainability.

B. Improve Water Resource Management
ƒ Effectively manage water resources through conjunctive use and other strategies. ƒ Encourage collaboration between technical/legal/managerial teams. ƒ Abide by the legal/regulatory groundwater management requirements. ƒ Support understanding of current and historic groundwater conditions to inform water resources initiatives.

C. Conduct Effective Outreach and Regional Coordination ƒ Maintain effective cooperation and information sharing to further the objectives of the NCMA agencies.
ƒ Reinforce the role of the NCMA TG as the recognized technical expert for water resources within the Northern Cities Management Area.

7.1.4 Strategic Initiatives and Implementation Plan
Fourteen key strategic initiatives were identified by the TG for improving the sustainability of the water resource. An iterative screening method was applied to objectively rank the strategic initiatives. Utilizing the ranked and grouped strategic initiatives, the NCMA TG developed an implementation plan for the key strategies.

The implementation plan includes a ranking for each initiative, the key participants, the required actions, an estimated budget, and an implementation time frame. The implementation time frame incorporates three periods: a current designation that refers to initiatives that the NCMA plans to complete within 1 year, a shortterm designation that refers to initiatives that could be completed within 5 years, and a long-term designation that refers to initiatives that are anticipated to take longer than 5 years to implement.

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SECTION 8: References
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Cal Poly. 2019. California Evapotranspiration Data for Irrigation District Water Balances, Irrigation Training & Research Center, San Luis Obispo, CA 93407-0730.

CHG. 2017. Phase 1A Model TM; Groundwater Flow Analysis Regional Groundwater Sustainability Project Arroyo Grande/Tri-Cities Mesa Area. Prepared for City of Pismo Beach and Water Systems Consulting.

Prepared by Cleath-Harris Geologists. February 2017.

DWR. 1970. Sea-Water Intrusion: Pismo-Guadalupe Area. Bulletin No. 63-3, 76 p. Prepared by the California Department of Water Resources.

DWR. 1975. Sea-Water Intrusion in California, Inventory of Coastal Ground Water Basins, Bulletin No. 63-5.

Prepared by the California Department of Water Resources.

DWR. 1979. Ground Water in the Arroyo Grande Area, Southern District Report. Prepared by the California Department of Water Resources.

DWR. 2002. Water Resources of the Arroyo Grande – Nipomo Mesa Area: Southern District Report. Prepared by the California Department of Water Resources.

DWR. 2016. IWFM Demand Calculator IDC 2015: Theoretical Documentation and User’s Manual. Central Valley Modeling Unit. Prepared by the California Department of Water Resources Bay Delta Office.

DWR et al. 2010. 20x2020 Water Conservation Plan. Prepared by the California Department of Water Resources, State Water Resources Control Board, California Bay-Delta Authority, California Energy Commission, California Department of Public Health, California Public Utilities Commission, California Air Resources Board.

DWR. 2024. The State Water Project Delivery Capability Report 2023. Prepared by State of California Natural Resources Agency Department of Water Resources. July 2024.

Fugro. 2015. Santa Maria Groundwater Basin Characterization and Planning Activities Study, Final Report.

Prepared for San Luis Obispo County Flood Control and Water Conservation District, December 30, 2015. Prepared by Fugro Consultants, Inc.

Geoscience Support Services. 2019. City of Pismo Beach and South San Luis Obispo County Sanitation District, Central Coast Blue Phase 1B Hydrogeologic Evaluation. Prepared for Water Systems Consulting. November 25, 2019.

Geoscience Support Services. 2021. City of Pismo Beach Central Coast Blue Phase 1C Hydrogeologic Evaluation Model Updates and Scenario Evaluation. Prepared for Water Systems Consulting. June 8, 2021.

GSI. 2025. Draft Technical Memorandum, NCMA Groundwater Model Update. March 27, 2025.

Miller, G. A. and R.E. Evenson. 1966. Utilization of Groundwater in the Santa Maria Valley Area, California.

USGS Water Supply Paper 1819-A.

MKN. 2021. City of Grover Beach 2020 Urban Water Management Plan. December 2021.

Mualem, Y. 1976. “A new model for predicting the hydraulic conductivity of unsaturated porous media.” Water Resources Res., 12, 513-522.

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NCMA. 2009. 2008 Annual Monitoring Report, prepared by Todd Engineers for Northern Cities Management Area. April 2009.

NCMA. 2010. 2009 Annual Monitoring Report, prepared by Todd Engineers for Northern Cities Management Area. April 2010.

NCMA. 2011. 2010 Annual Monitoring Report, prepared by GEI Consultants for Northern Cities Management Area. April 2011.

NCMA. 2012. 2011 Annual Monitoring Report, prepared by GEI Consultants for Northern Cities Management Area. May 2012.

NCMA. 2013. 2012 Annual Monitoring Report, prepared by GEI Consultants for Northern Cities Management Area. April 2013.

NCMA. 2014. 2013 Annual Monitoring Report, prepared by Fugro Consultants for Northern Cities Management Area. April 2014.

NCMA. 2015. 2014 Annual Monitoring Report, prepared by Fugro Consultants for Northern Cities Management Area. April 2015.

NCMA. 2016. 2015 Annual Monitoring Report, prepared by Fugro Consultants for Northern Cities Management Area. April 2016.

NCMA. 2017. 2016 Annual Monitoring Report, prepared by GSI Water Solutions, Inc. for Northern Cities Management Area. April 2017.

NCMA. 2018. 2017 Annual Monitoring Report, prepared by GSI Water Solutions, Inc. for Northern Cities Management Area. April 2018.

NCMA. 2019. 2018 Annual Monitoring Report, prepared by GSI Water Solutions, Inc. for Northern Cities Management Area. April 2019.

NCMA. 2020. 2019 Annual Monitoring Report, prepared by GSI Water Solutions, Inc. for Northern Cities Management Area. April 2020.

NCMA. 2021. 2020 Annual Monitoring Report, prepared by GSI Water Solutions, Inc. for Northern Cities Management Area. April 2021.

NCMA. 2022. 2021 Annual Monitoring Report, prepared by GSI Water Solutions, Inc. for Northern Cities Management Area. April 2022.

NCMA. 2023. 2022 Annual Monitoring Report, prepared by GSI Water Solutions, Inc. for Northern Cities Management Area. April 2023.

NCMA. 2024. 2023 Annual Monitoring Report, prepared by GSI Water Solutions, Inc. for Northern Cities Management Area. April 2024.

NCMA. 2025. 2024 Annual Monitoring Report, prepared by GSI Water Solutions, Inc. for Northern Cities Management Area. April 2025.

NMMA. 2010. 2nd Annual Report, Calendar Year 2009, prepared by the Nipomo Mesa Management Area Technical Group, April 2010.

NMMA. 2011. 3rd Annual Report, Calendar Year 2010, prepared by the Nipomo Mesa Management Area Technical Group, April 2011.

NMMA. 2012. 4th Annual Report, Calendar Year 2011, prepared by the Nipomo Mesa Management Area Technical Group, April 2012.

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NMMA. 2013. 5th Annual Report, Calendar Year 2012, prepared by the Nipomo Mesa Management Area Technical Group, April 2013.

NMMA. 2014. 6th Annual Report, Calendar Year 2013, prepared by the Nipomo Mesa Management Area Technical Group, April 2014.

NMMA. 2015. 7th Annual Report, Calendar Year 2014, prepared by the Nipomo Mesa Management Area Technical Group, April 2015.

NMMA. 2016. 8th Annual Report, Calendar Year 2015, prepared by the Nipomo Mesa Management Area Technical Group, April 2016.

NMMA. 2017. 9th Annual Report, Calendar Year 2016, prepared by the Nipomo Mesa Management Area Technical Group, April 2017.

NMMA. 2018. 10th Annual Report, Calendar Year 2017, prepared by the Nipomo Mesa Management Area Technical Group, April 2018.

NMMA. 2019. 11th Annual Report, Calendar Year 2018, prepared by the Nipomo Mesa Management Area Technical Group, April 2019.

NMMA. 2020. 12th Annual Report, Calendar Year 2019, prepared by the Nipomo Mesa Management Area Technical Group, April 2020.

NMMA. 2021. 13th Annual Report, Calendar Year 2020, prepared by the Nipomo Mesa Management Area Technical Group, April 2021.

NMMA. 2022. 14th Annual Report, Calendar Year 2021, prepared by the Nipomo Mesa Management Area Technical Group, April 2022.

NMMA. 2023. 15th Annual Report, Calendar Year 2022, prepared by the Nipomo Mesa Management Area Technical Group, April 2023.

PG&E. 2014. Central Coastal California Seismic Imaging Project (CCSIP), report to the California Public Utilities Commission. http://www.pge.com/en/safety/systemworks/dcpp/seismicsafety/report.page.

Prepared by Pacific Gas and Electric Company.

Ploessel M.R. 1982. Ghyben-herzberg ratio. In: Beaches and Coastal Geology. Encyclopedia of Earth Sciences Series. Springer, New York, NY. https://doi.org/10.1007/0-387-30843-1_207.

Ramboll. 2022. Pismo Beach Groundwater Investigation; Processing, Inversion and Interpretation of AEM Data. Prepared for City of Pismo Beach and Water Systems Consulting. January 2022.

SLO Co. 2007. San Luis Obispo County Flood Control and Water Conservation District Zone 3 Lopez Project, Interim Downstream Release Schedule. Prepared by San Luis Obispo County. February 2, 2007.

SLO Co. 2019. San Luis Obispo County Stormwater Resource Plan. Submitted to the State Water Resources Control Board on February 28, 2019. Prepared by San Luis Obispo County.

SLO Co. 2025a. “County of San Luis Obispo Prevails in Its Appeal over Court Ordered Water Releases from Lopez Lake.” January 23, 2025. https://www.slocounty.ca.gov/departments/publicworks/department-news/2025/county-of-san-luis-obispo-prevails-in-its-appeal-over-court-orderedwater-releases-from-lopez-lake.

SLO Co. 2025b. San Luis Obispo County Flood Control and Water District, Zone 3 - Lopez Project – Monthly Operations Report, January, 2025. Prepared by San Luis Obispo County.

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SLOFCWCD. 2014. Low Reservoir Response Plan for the San Luis Obispo County Flood Control and Water Conservation District Zone 3. Prepared by the San Luis Obispo County Flood Control and Water Conservation District Zone 3.

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Todd. 2007. Water Balance Study for the Northern Cities Area. Prepared by Todd Engineers.

Todd. 2008. Monitoring Program for the Northern Cities Management Area. Prepared by Todd Engineers.

Todd. 2010. Summary of Renovations for the Northern Cities Management Area Sentry Wells, San Luis Obispo County, California. Prepared by Todd Engineers.

USGS. 2006. Quaternary fault and fold database for the United States. U.S. Geological Survey. http://earthquake.usgs.gov/regional/qfaults.
van Genuchten, M.T. 1985. “A closed-form solution for predicting the conductivity of unsaturated soils.” Soil Sci. Soc. Am. J., 44, 892-898.

Wallace Group. 2010. Survey Report on the “Sentry” Well Elevation Establishment for Cities of Arroyo Grande, Grover Beach, Pismo Beach and the Oceano Community Services District.

WSC. 2011a. Capacity Assessment of the Coastal Branch, Chorro Valley, & Lopez Pipelines. Prepared by Water Systems Consulting, Inc. for the San Luis Obispo County Flood Control and Water Conservation District and the Central Coast Water Authority. Prepared by Water Systems Consulting, Inc.

WSC. 2011b. Lopez Pipeline Re-Evaluation Technical Memorandum. Prepared by Water Systems Consulting, Inc. for the San Luis Obispo County Flood Control and Water Conservation District and the Central Coast Water Authority. Prepared by Water Systems Consulting, Inc.

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WSC. 2017. Lopez Bypass & State Water Delivery Evaluation. Prepared for the San Luis Obispo County Flood Control and Water Conservation District. Prepared by Water Systems Consulting, Inc.

WSC. 2021. City of Pismo Beach 2020 Urban Water Management Plan. June 2021.

WSC. 2023. City of Arroyo Grande Final 2022 Urban Water Management Plan. Prepared by Water Systems Consulting, Inc. June 2023.

Woodring, W.P. and M.N. Bramlette. 1950. “Geology and Paleontology of the Santa Maria District, California.” U.S. Geological Survey, Professional Paper 222, 142 p.

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Geological Survey Water-Supply Paper 1000, 176 p.

APPENDIX A
NCMA Sentry Well Water Level and Water Quality Data

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Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/21/2025 Stove Pipe Top of PVC Casing 13.33 9.66 3.6732S/12E-24B01 North Beach Campground - Shallow Alluvium 7/15/2025 Stove Pipe Top of PVC Casing 13.33 7.34 5.99 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/14/2025 Stove Pipe Top of PVC Casing 13.33 7.47 5.86 32S/12E-24B01 North Beach Campground - Shallow Alluvium 1/22/2025 Stove Pipe Top of PVC Casing 13.33 7.40 5.93 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/15/2024 Stove Pipe Top of PVC Casing 13.33 7.62 5.7132S/12E-24B01 North Beach Campground - Shallow Alluvium 7/9/2024 Stove Pipe Top of PVC Casing 13.33 7.21 6.12 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/17/2024 Stove Pipe Top of PVC Casing 13.33 7.25 6.08 32S/12E-24B01 North Beach Campground - Shallow Alluvium 1/9/2024 Stove Pipe Top of PVC Casing 13.33 7.87 5.46 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/10/2023 Stove Pipe Top of PVC Casing 13.33 7.50 5.8332S/12E-24B01 North Beach Campground - Shallow Alluvium 7/4/2023 Stove Pipe Top of PVC Casing 13.33 7.16 6.17 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/11/2023 Stove Pipe Top of PVC Casing 13.33 6.83 6.50 32S/12E-24B01 North Beach Campground - Shallow Alluvium 2/7/2023 Stove Pipe Top of PVC Casing 13.33 7.45 5.88 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/3/2022 Stove Pipe Top of PVC Casing 13.33 7.36 5.97 32S/12E-24B01 North Beach Campground - Shallow Alluvium 7/11/2022 Stove Pipe Top of PVC Casing 13.33 7.00 6.33 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/5/2022 Stove Pipe Top of PVC Casing 13.33 7.26 6.07 32S/12E-24B01 North Beach Campground - Shallow Alluvium 1/4/2022 Stove Pipe Top of PVC Casing 13.33 7.71 5.62 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/5/2021 Stove Pipe Top of PVC Casing 13.33 7.38 5.95 32S/12E-24B01 North Beach Campground - Shallow Alluvium 7/13/2021 Stove Pipe Top of PVC Casing 13.33 7.43 5.90 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/6/2021 Stove Pipe Top of PVC Casing 13.33 7.38 5.95 32S/12E-24B01 North Beach Campground - Shallow Alluvium 1/6/2021 Stove Pipe Top of PVC Casing 13.33 7.50 5.83 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/7/2020 Stove Pipe Top of PVC Casing 13.33 7.31 6.02 32S/12E-24B01 North Beach Campground - Shallow Alluvium 7/6/2020 Stove Pipe Top of PVC Casing 13.33 7.64 5.69 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/17/2020 Stove Pipe Top of PVC Casing 13.33 7.65 5.68 32S/12E-24B01 North Beach Campground - Shallow Alluvium 1/7/2020 Stove Pipe Top of PVC Casing 13.33 7.78 5.55 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/9/2019 Stove Pipe Top of PVC Casing 13.33 7.36 5.97 32S/12E-24B01 North Beach Campground - Shallow Alluvium 7/9/2019 Stove Pipe Top of PVC Casing 13.33 7.51 5.82 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/9/2019 Stove Pipe Top of PVC Casing 13.33 7.18 6.15 32S/12E-24B01 North Beach Campground - Shallow Alluvium 1/8/2019 Stove Pipe Top of PVC Casing 13.33 7.63 5.70 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/9/2018 Stove Pipe Top of PVC Casing 13.33 7.29 6.04 32S/12E-24B01 North Beach Campground - Shallow Alluvium 7/10/2018 Stove Pipe Top of PVC Casing 13.33 6.58 6.75 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/10/2018 Stove Pipe Top of PVC Casing 13.33 7.10 6.23 32S/12E-24B01 North Beach Campground - Shallow Alluvium 1/10/2018 Stove Pipe Top of PVC Casing 13.33 7.58 5.75 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/10/2017 Stove Pipe Top of PVC Casing 13.33 7.46 5.8732S/12E-24B01 North Beach Campground - Shallow Alluvium 7/11/2017 Stove Pipe Top of PVC Casing 13.33 6.84 6.49 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/11/2017 Stove Pipe Top of PVC Casing 13.33 7.28 6.05 32S/12E-24B01 North Beach Campground - Shallow Alluvium 1/10/2017 Stove Pipe Top of PVC Casing 13.33 8.04 5.29 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/12/2016 Stove Pipe Top of PVC Casing 13.33 7.04 6.2932S/12E-24B01 North Beach Campground - Shallow Alluvium 7/19/2016 Stove Pipe Top of PVC Casing 13.33 6.80 6.53 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/12/2016 Stove Pipe Top of PVC Casing 13.33 7.23 6.10 32S/12E-24B01 North Beach Campground - Shallow Alluvium 1/12/2016 Stove Pipe Top of PVC Casing 13.33 8.41 4.92 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/13/2015 Stove Pipe Top of PVC Casing 13.33 7.85 5.4832S/12E-24B01 North Beach Campground - Shallow Alluvium 7/14/2015 Stove Pipe Top of PVC Casing 13.33 7.52 5.81 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/14/2015 Stove Pipe Top of PVC Casing 13.33 7.36 5.97 32S/12E-24B01 North Beach Campground - Shallow Alluvium 1/13/2015 Stove Pipe Top of PVC Casing 13.33 7.75 5.58 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/14/2014 Stove Pipe Top of PVC Casing 13.33 7.82 5.51 32S/12E-24B01 North Beach Campground - Shallow Alluvium 7/29/2014 Stove Pipe Top of PVC Casing 13.33 7.59 5.74 Table A-1. NCMA Sentry Wells Water Level Data

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/12E-24B01 North Beach Campground - Shallow Alluvium 6/4/2014 Stove Pipe Top of PVC Casing 13.33 7.06 6.2732S/12E-24B01 North Beach Campground - Shallow Alluvium 4/15/2014 Stove Pipe Top of PVC Casing 13.33 7.63 5.70 32S/12E-24B01 North Beach Campground - Shallow Alluvium 1/14/2014 Stove Pipe Top of PVC Casing 13.33 7.83 5.50 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/14/2013 Stove Pipe Top of PVC Casing 13.33 7.51 5.8232S/12E-24B01 North Beach Campground - Shallow Alluvium 7/9/2013 Stove Pipe Top of PVC Casing 13.33 7.49 5.84 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/10/2013 Stove Pipe Top of PVC Casing 13.33 6.58 6.75 32S/12E-24B01 North Beach Campground - Shallow Alluvium 1/14/2013 Stove Pipe Top of PVC Casing 13.33 7.86 5.47 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/29/2012 Stove Pipe Top of PVC Casing 13.33 7.66 5.6732S/12E-24B01 North Beach Campground - Shallow Alluvium 7/23/2012 Stove Pipe Top of PVC Casing 13.33 7.79 5.54 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/18/2012 Stove Pipe Top of PVC Casing 13.33 8.00 5.33 32S/12E-24B01 North Beach Campground - Shallow Alluvium 1/11/2012 Stove Pipe Top of PVC Casing 13.33 7.86 5.47 32S/12E-24B01 North Beach Campground - Shallow Alluvium 11/21/2011 Stove Pipe Top of PVC Casing 13.33 7.78 5.5532S/12E-24B01 North Beach Campground - Shallow Alluvium 7/26/2011 Stove Pipe Top of PVC Casing 13.33 7.20 6.13 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/20/2011 Stove Pipe Top of PVC Casing 13.33 7.18 6.15 32S/12E-24B01 North Beach Campground - Shallow Alluvium 1/24/2011 Stove Pipe Top of PVC Casing 13.33 7.80 5.53 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/21/2010 Stove Pipe Top of PVC Casing 13.33 7.21 6.12 32S/12E-24B01 North Beach Campground - Shallow Alluvium 7/27/2010 Stove Pipe Top of PVC Casing 13.33 7.10 6.23 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/27/2010 Stove Pipe Top of PVC Casing 13.33 6.86 6.47 32S/12E-24B01 North Beach Campground - Shallow Alluvium 1/27/2010 Stove Pipe Top of PVC Casing 13.33 7.57 5.76 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/19/2009 Stove Pipe Top of PVC Casing 13.33 8.42 4.9132S/12E-24B01 North Beach Campground - Shallow Alluvium 8/20/2009 Stove Pipe Top of PVC Casing 13.33 7.45 5.88 32S/12E-24B01 North Beach Campground - Shallow Alluvium 5/12/2009 Stove Pipe Top of PVC Casing 13.33 7.12 6.21 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/7/2009 Stove Pipe Top of PVC Casing 13.33 9.09 4.24 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/15/2008 Stove Pipe Top of PVC Casing 13.33 5.98 7.3532S/12E-24B01 North Beach Campground - Shallow Alluvium 4/15/2008 Stove Pipe Top of PVC Casing 13.33 8.05 5.28 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/18/2007 Stove Pipe Top of PVC Casing 13.33 5.55 7.7832S/12E-24B01 North Beach Campground - Shallow Alluvium 10/19/2006 Stove Pipe Top of PVC Casing 13.33 9.95 3.3832S/12E-24B01 North Beach Campground - Shallow Alluvium 4/25/2006 Stove Pipe Top of PVC Casing 13.33 7.70 5.63 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/7/2005 Stove Pipe Top of PVC Casing 13.33 6.40 6.93 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/29/2005 Stove Pipe Top of PVC Casing 13.33 8.05 5.28 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/29/2004 Stove Pipe Top of PVC Casing 13.33 6.00 7.33 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/8/2004 Stove Pipe Top of PVC Casing 13.33 9.90 3.43 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/8/2003 Stove Pipe Top of PVC Casing 13.33 9.50 3.83 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/14/2002 Stove Pipe Top of PVC Casing 13.33 7.10 6.2332S/12E-24B01 North Beach Campground - Shallow Alluvium 4/9/2002 Stove Pipe Top of PVC Casing 13.33 9.90 3.43 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/5/2001 Stove Pipe Top of PVC Casing 13.33 8.00 5.33 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/23/2001 Stove Pipe Top of PVC Casing 13.33 8.50 4.83 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/24/2000 Stove Pipe Top of PVC Casing 13.33 7.20 6.13 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/29/1999 Stove Pipe Top of PVC Casing 13.33 7.50 5.8332S/12E-24B01 North Beach Campground - Shallow Alluvium 4/15/1999 Stove Pipe Top of PVC Casing 13.33 8.92 4.41 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/20/1998 Stove Pipe Top of PVC Casing 13.33 8.50 4.8332S/12E-24B01 North Beach Campground - Shallow Alluvium 4/23/1998 Stove Pipe Top of PVC Casing 13.33 9.70 3.63 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/22/1997 Stove Pipe Top of PVC Casing 13.33 7.54 5.7932S/12E-24B01 North Beach Campground - Shallow Alluvium 4/29/1997 Stove Pipe Top of PVC Casing 13.33 7.57 5.76 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/23/1996 Stove Pipe Top of PVC Casing 13.33 6.20 7.13 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/29/1996 Stove Pipe Top of PVC Casing 13.33 7.50 5.83

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/10/1995 Stove Pipe Top of PVC Casing 13.33 7.40 5.9332S/12E-24B01 North Beach Campground - Shallow Alluvium 4/19/1995 Stove Pipe Top of PVC Casing 13.33 8.81 4.52 32S/12E-24B01 North Beach Campground - Shallow Alluvium 11/1/1994 Stove Pipe Top of PVC Casing 13.33 6.00 7.33 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/11/1994 Stove Pipe Top of PVC Casing 13.33 6.74 6.59 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/13/1993 Stove Pipe Top of PVC Casing 13.33 6.75 6.5832S/12E-24B01 North Beach Campground - Shallow Alluvium 4/8/1993 Stove Pipe Top of PVC Casing 13.33 7.81 5.52 32S/12E-24B01 North Beach Campground - Shallow Alluvium 11/4/1992 Stove Pipe Top of PVC Casing 13.33 7.50 5.83 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/21/1992 Stove Pipe Top of PVC Casing 13.33 6.80 6.53 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/11/1991 Stove Pipe Top of PVC Casing 13.33 6.19 7.1432S/12E-24B01 North Beach Campground - Shallow Alluvium 4/19/1991 Stove Pipe Top of PVC Casing 13.33 6.35 6.98 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/11/1990 Stove Pipe Top of PVC Casing 13.33 6.36 6.9732S/12E-24B01 North Beach Campground - Shallow Alluvium 4/24/1990 Stove Pipe Top of PVC Casing 13.33 6.16 7.17 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/4/1989 Stove Pipe Top of PVC Casing 13.33 7.19 6.14 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/17/1989 Stove Pipe Top of PVC Casing 13.33 6.39 6.94 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/20/1988 Stove Pipe Top of PVC Casing 13.33 6.30 7.0332S/12E-24B01 North Beach Campground - Shallow Alluvium 4/29/1988 Stove Pipe Top of PVC Casing 13.33 6.44 6.89 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/21/1988 Stove Pipe Top of PVC Casing 13.33 6.36 6.97 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/19/1987 Stove Pipe Top of PVC Casing 13.33 6.25 7.0832S/12E-24B01 North Beach Campground - Shallow Alluvium 4/13/1987 Stove Pipe Top of PVC Casing 13.33 7.52 5.81 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/31/1986 Stove Pipe Top of PVC Casing 13.33 6.82 6.5132S/12E-24B01 North Beach Campground - Shallow Alluvium 4/27/1986 Stove Pipe Top of PVC Casing 13.33 6.52 6.81 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/18/1985 Stove Pipe Top of PVC Casing 13.33 7.29 6.0432S/12E-24B01 North Beach Campground - Shallow Alluvium 4/22/1985 Stove Pipe Top of PVC Casing 13.33 8.60 4.73 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/29/1984 Stove Pipe Top of PVC Casing 13.33 8.58 4.7532S/12E-24B01 North Beach Campground - Shallow Alluvium 10/28/1983 Stove Pipe Top of PVC Casing 13.33 8.78 4.5532S/12E-24B01 North Beach Campground - Shallow Alluvium 5/6/1982 Stove Pipe Top of PVC Casing 13.33 8.55 4.78 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/19/1981 Stove Pipe Top of PVC Casing 13.33 8.62 4.7132S/12E-24B01 North Beach Campground - Shallow Alluvium 4/21/1981 Stove Pipe Top of PVC Casing 13.33 8.64 4.69 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/21/1980 Stove Pipe Top of PVC Casing 13.33 8.11 5.2232S/12E-24B01 North Beach Campground - Shallow Alluvium 5/9/1980 Stove Pipe Top of PVC Casing 13.33 8.62 4.71 32S/12E-24B01 North Beach Campground - Shallow Alluvium 11/7/1979 Stove Pipe Top of PVC Casing 13.33 8.10 5.23 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/17/1979 Stove Pipe Top of PVC Casing 13.33 8.57 4.76 32S/12E-24B01 North Beach Campground - Shallow Alluvium 5/17/1977 Stove Pipe Top of PVC Casing 13.33 8.31 5.02 32S/12E-24B01 North Beach Campground - Shallow Alluvium 6/9/1976 Stove Pipe Top of PVC Casing 13.33 -3.30 16.63 32S/12E-24B01 North Beach Campground - Shallow Alluvium 5/21/1976 Stove Pipe Top of PVC Casing 13.33 6.70 6.63 32S/12E-24B01 North Beach Campground - Shallow Alluvium 1/14/1976 Stove Pipe Top of PVC Casing 13.33 8.70 4.63 32S/12E-24B01 North Beach Campground - Shallow Alluvium 7/7/1975 Stove Pipe Top of PVC Casing 13.33 8.70 4.63 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/1/1975 Stove Pipe Top of PVC Casing 13.33 8.62 4.71 32S/12E-24B01 North Beach Campground - Shallow Alluvium 6/7/1974 Stove Pipe Top of PVC Casing 13.33 9.70 3.63 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/1/1974 Stove Pipe Top of PVC Casing 13.33 8.70 4.63 32S/12E-24B01 North Beach Campground - Shallow Alluvium 9/20/1973 Stove Pipe Top of PVC Casing 13.33 8.54 4.79 32S/12E-24B01 North Beach Campground - Shallow Alluvium 6/29/1972 Stove Pipe Top of PVC Casing 13.33 8.13 5.20 32S/12E-24B01 North Beach Campground - Shallow Alluvium 2/29/1972 Stove Pipe Top of PVC Casing 13.33 9.70 3.63 32S/12E-24B01 North Beach Campground - Shallow Alluvium 2/21/1972 Stove Pipe Top of PVC Casing 13.33 9.25 4.08 32S/12E-24B01 North Beach Campground - Shallow Alluvium 11/29/1971 Stove Pipe Top of PVC Casing 13.33 8.34 4.99 32S/12E-24B01 North Beach Campground - Shallow Alluvium 8/28/1971 Stove Pipe Top of PVC Casing 13.33 8.45 4.88

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/12E-24B01 North Beach Campground - Shallow Alluvium 6/2/1971 Stove Pipe Top of PVC Casing 13.33 8.11 5.2232S/12E-24B01 North Beach Campground - Shallow Alluvium 3/2/1971 Stove Pipe Top of PVC Casing 13.33 8.89 4.44 32S/12E-24B01 North Beach Campground - Shallow Alluvium 12/15/1970 Stove Pipe Top of PVC Casing 13.33 8.28 5.0532S/12E-24B01 North Beach Campground - Shallow Alluvium 8/4/1970 Stove Pipe Top of PVC Casing 13.33 7.70 5.63 32S/12E-24B01 North Beach Campground - Shallow Alluvium 6/3/1970 Stove Pipe Top of PVC Casing 13.33 8.40 4.93 32S/12E-24B01 North Beach Campground - Shallow Alluvium 3/27/1970 Stove Pipe Top of PVC Casing 13.33 8.54 4.79 32S/12E-24B01 North Beach Campground - Shallow Alluvium 1/29/1970 Stove Pipe Top of PVC Casing 13.33 8.47 4.86 32S/12E-24B01 North Beach Campground - Shallow Alluvium 10/3/1969 Stove Pipe Top of PVC Casing 13.33 8.15 5.18 32S/12E-24B01 North Beach Campground - Shallow Alluvium 7/23/1969 Stove Pipe Top of PVC Casing 13.33 7.70 5.63 32S/12E-24B01 North Beach Campground - Shallow Alluvium 6/24/1969 Stove Pipe Top of PVC Casing 13.33 7.70 5.63 32S/12E-24B01 North Beach Campground - Shallow Alluvium 5/22/1969 Stove Pipe Top of PVC Casing 13.33 7.70 5.63 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/18/1969 Stove Pipe Top of PVC Casing 13.33 8.57 4.76 32S/12E-24B01 North Beach Campground - Shallow Alluvium 1/15/1969 Stove Pipe Top of PVC Casing 13.33 7.99 5.34 32S/12E-24B01 North Beach Campground - Shallow Alluvium 12/12/1968 Stove Pipe Top of PVC Casing 13.33 7.89 5.4432S/12E-24B01 North Beach Campground - Shallow Alluvium 11/14/1968 Stove Pipe Top of PVC Casing 13.33 7.70 5.6332S/12E-24B01 North Beach Campground - Shallow Alluvium 10/17/1968 Stove Pipe Top of PVC Casing 13.33 7.23 6.10 32S/12E-24B01 North Beach Campground - Shallow Alluvium 9/14/1968 Stove Pipe Top of PVC Casing 13.33 7.06 6.27 32S/12E-24B01 North Beach Campground - Shallow Alluvium 8/13/1968 Stove Pipe Top of PVC Casing 13.33 7.47 5.86 32S/12E-24B01 North Beach Campground - Shallow Alluvium 7/22/1968 Stove Pipe Top of PVC Casing 13.33 7.02 6.31 32S/12E-24B01 North Beach Campground - Shallow Alluvium 6/24/1968 Stove Pipe Top of PVC Casing 13.33 7.00 6.33 32S/12E-24B01 North Beach Campground - Shallow Alluvium 5/30/1968 Stove Pipe Top of PVC Casing 13.33 7.01 6.32 32S/12E-24B01 North Beach Campground - Shallow Alluvium 4/20/1968 Stove Pipe Top of PVC Casing 13.33 7.86 5.47 32S/12E-24B01 North Beach Campground - Shallow Alluvium 3/21/1968 Stove Pipe Top of PVC Casing 13.33 7.71 5.62 32S/12E-24B01 North Beach Campground - Shallow Alluvium 2/22/1968 Stove Pipe Top of PVC Casing 13.33 8.03 5.30 32S/12E-24B01 North Beach Campground - Shallow Alluvium 1/16/1968 Stove Pipe Top of PVC Casing 13.33 8.36 4.97 32S/12E-24B01 North Beach Campground - Shallow Alluvium 12/8/1967 Stove Pipe Top of PVC Casing 13.33 8.04 5.29 32S/12E-24B01 North Beach Campground - Shallow Alluvium 11/13/1967 Stove Pipe Top of PVC Casing 13.33 7.71 5.6232S/12E-24B01 North Beach Campground - Shallow Alluvium 10/11/1967 Stove Pipe Top of PVC Casing 13.33 6.84 6.4932S/12E-24B01 North Beach Campground - Shallow Alluvium 9/5/1967 Stove Pipe Top of PVC Casing 13.33 7.35 5.98 32S/12E-24B01 North Beach Campground - Shallow Alluvium 8/8/1967 Stove Pipe Top of PVC Casing 13.33 7.13 6.20 32S/12E-24B01 North Beach Campground - Shallow Alluvium 7/12/1967 Stove Pipe Top of PVC Casing 13.33 7.01 6.32 32S/12E-24B01 North Beach Campground - Shallow Alluvium 6/1/1967 Stove Pipe Top of PVC Casing 13.33 7.50 5.83 32S/12E-24B01 North Beach Campground - Shallow Alluvium 5/2/1967 Stove Pipe Top of PVC Casing 13.33 7.60 5.73 32S/12E-24B02 North Beach Campground - Middle Paso Robles 10/21/2025 Stove Pipe Top of PVC Casing 13.41 8.15 5.26 32S/12E-24B02 North Beach Campground - Middle Paso Robles 7/15/2025 Stove Pipe Top of PVC Casing 13.41 6.89 6.5232S/12E-24B02 North Beach Campground - Middle Paso Robles 4/14/2025 Stove Pipe Top of PVC Casing 13.41 7.85 5.5632S/12E-24B02 North Beach Campground - Middle Paso Robles 1/22/2025 Stove Pipe Top of PVC Casing 13.41 7.47 5.9432S/12E-24B02 North Beach Campground - Middle Paso Robles 10/15/2024 Stove Pipe Top of PVC Casing 13.41 8.21 5.20 32S/12E-24B02 North Beach Campground - Middle Paso Robles 7/9/2024 Stove Pipe Top of PVC Casing 13.41 7.39 6.0232S/12E-24B02 North Beach Campground - Middle Paso Robles 4/17/2024 Stove Pipe Top of PVC Casing 13.41 7.93 5.4832S/12E-24B02 North Beach Campground - Middle Paso Robles 1/9/2024 Stove Pipe Top of PVC Casing 13.41 8.81 4.6032S/12E-24B02 North Beach Campground - Middle Paso Robles 10/10/2023 Stove Pipe Top of PVC Casing 13.41 8.04 5.37 32S/12E-24B02 North Beach Campground - Middle Paso Robles 7/4/2023 Stove Pipe Top of PVC Casing 13.41 7.26 6.1532S/12E-24B02 North Beach Campground - Middle Paso Robles 4/11/2023 Stove Pipe Top of PVC Casing 13.41 7.33 6.0832S/12E-24B02 North Beach Campground - Middle Paso Robles 2/7/2023 Stove Pipe Top of PVC Casing 13.41 7.77 5.64 32S/12E-24B02 North Beach Campground - Middle Paso Robles 10/3/2022 Stove Pipe Top of PVC Casing 13.41 6.79 6.62

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/12E-24B02 North Beach Campground - Middle Paso Robles 7/11/2022 Stove Pipe Top of PVC Casing 13.41 6.24 7.1732S/12E-24B02 North Beach Campground - Middle Paso Robles 4/5/2022 Stove Pipe Top of PVC Casing 13.41 6.54 6.8732S/12E-24B02 North Beach Campground - Middle Paso Robles 1/4/2022 Stove Pipe Top of PVC Casing 13.41 7.85 5.5632S/12E-24B02 North Beach Campground - Middle Paso Robles 10/5/2021 Stove Pipe Top of PVC Casing 13.41 7.02 6.3932S/12E-24B02 North Beach Campground - Middle Paso Robles 7/13/2021 Stove Pipe Top of PVC Casing 13.41 6.48 6.9332S/12E-24B02 North Beach Campground - Middle Paso Robles 4/6/2021 Stove Pipe Top of PVC Casing 13.41 7.33 6.0832S/12E-24B02 North Beach Campground - Middle Paso Robles 1/6/2021 Stove Pipe Top of PVC Casing 13.41 7.31 6.1032S/12E-24B02 North Beach Campground - Middle Paso Robles 10/7/2020 Stove Pipe Top of PVC Casing 13.41 6.94 6.4732S/12E-24B02 North Beach Campground - Middle Paso Robles 7/6/2020 Stove Pipe Top of PVC Casing 13.41 7.23 6.1832S/12E-24B02 North Beach Campground - Middle Paso Robles 4/7/2020 Stove Pipe Top of PVC Casing 13.41 8.04 5.3732S/12E-24B02 North Beach Campground - Middle Paso Robles 1/7/2020 Stove Pipe Top of PVC Casing 13.41 7.65 5.7632S/12E-24B02 North Beach Campground - Middle Paso Robles 10/9/2019 Stove Pipe Top of PVC Casing 13.41 7.06 6.3532S/12E-24B02 North Beach Campground - Middle Paso Robles 7/9/2019 Stove Pipe Top of PVC Casing 13.41 7.18 6.2332S/12E-24B02 North Beach Campground - Middle Paso Robles 4/9/2019 Stove Pipe Top of PVC Casing 13.41 7.08 6.3332S/12E-24B02 North Beach Campground - Middle Paso Robles 1/8/2019 Stove Pipe Top of PVC Casing 13.41 7.58 5.8332S/12E-24B02 North Beach Campground - Middle Paso Robles 10/9/2018 Stove Pipe Top of PVC Casing 13.41 6.93 6.48 32S/12E-24B02 North Beach Campground - Middle Paso Robles 7/10/2018 Stove Pipe Top of PVC Casing 13.41 6.41 7.0032S/12E-24B02 North Beach Campground - Middle Paso Robles 4/10/2018 Stove Pipe Top of PVC Casing 13.41 7.56 5.8532S/12E-24B02 North Beach Campground - Middle Paso Robles 1/10/2018 Stove Pipe Top of PVC Casing 13.41 8.01 5.4032S/12E-24B02 North Beach Campground - Middle Paso Robles 10/10/2017 Stove Pipe Top of PVC Casing 13.41 7.12 6.29 32S/12E-24B02 North Beach Campground - Middle Paso Robles 7/11/2017 Stove Pipe Top of PVC Casing 13.41 6.65 6.7632S/12E-24B02 North Beach Campground - Middle Paso Robles 4/11/2017 Stove Pipe Top of PVC Casing 13.41 7.32 6.0932S/12E-24B02 North Beach Campground - Middle Paso Robles 1/10/2017 Stove Pipe Top of PVC Casing 13.41 8.25 5.1632S/12E-24B02 North Beach Campground - Middle Paso Robles 10/12/2016 Stove Pipe Top of PVC Casing 13.41 6.53 6.88 32S/12E-24B02 North Beach Campground - Middle Paso Robles 7/19/2016 Stove Pipe Top of PVC Casing 13.41 5.97 7.4432S/12E-24B02 North Beach Campground - Middle Paso Robles 4/12/2016 Stove Pipe Top of PVC Casing 13.41 7.21 6.2032S/12E-24B02 North Beach Campground - Middle Paso Robles 1/12/2016 Stove Pipe Top of PVC Casing 13.41 8.07 5.3432S/12E-24B02 North Beach Campground - Middle Paso Robles 10/13/2015 Stove Pipe Top of PVC Casing 13.41 6.97 6.44 32S/12E-24B02 North Beach Campground - Middle Paso Robles 7/14/2015 Stove Pipe Top of PVC Casing 13.41 6.61 6.8032S/12E-24B02 North Beach Campground - Middle Paso Robles 4/14/2015 Stove Pipe Top of PVC Casing 13.41 6.45 6.9632S/12E-24B02 North Beach Campground - Middle Paso Robles 1/13/2015 Stove Pipe Top of PVC Casing 13.41 7.30 6.11 32S/12E-24B02 North Beach Campground - Middle Paso Robles 10/14/2014 Stove Pipe Top of PVC Casing 13.41 6.97 6.44 32S/12E-24B02 North Beach Campground - Middle Paso Robles 7/29/2014 Stove Pipe Top of PVC Casing 13.41 6.53 6.8832S/12E-24B02 North Beach Campground - Middle Paso Robles 6/4/2014 Stove Pipe Top of PVC Casing 13.41 5.33 8.0832S/12E-24B02 North Beach Campground - Middle Paso Robles 4/15/2014 Stove Pipe Top of PVC Casing 13.41 7.03 6.3832S/12E-24B02 North Beach Campground - Middle Paso Robles 1/14/2014 Stove Pipe Top of PVC Casing 13.41 7.24 6.1732S/12E-24B02 North Beach Campground - Middle Paso Robles 10/14/2013 Stove Pipe Top of PVC Casing 13.41 6.50 6.91 32S/12E-24B02 North Beach Campground - Middle Paso Robles 7/9/2013 Stove Pipe Top of PVC Casing 13.41 6.41 7.0032S/12E-24B02 North Beach Campground - Middle Paso Robles 4/10/2013 Stove Pipe Top of PVC Casing 13.41 7.25 6.1632S/12E-24B02 North Beach Campground - Middle Paso Robles 1/14/2013 Stove Pipe Top of PVC Casing 13.41 7.97 5.4432S/12E-24B02 North Beach Campground - Middle Paso Robles 10/29/2012 Stove Pipe Top of PVC Casing 13.41 7.70 5.71 32S/12E-24B02 North Beach Campground - Middle Paso Robles 7/23/2012 Stove Pipe Top of PVC Casing 13.41 7.46 5.95 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/18/2012 Stove Pipe Top of PVC Casing 13.41 8.10 5.3132S/12E-24B02 North Beach Campground - Middle Paso Robles 1/11/2012 Stove Pipe Top of PVC Casing 13.41 8.11 5.3032S/12E-24B02 North Beach Campground - Middle Paso Robles 11/21/2011 Stove Pipe Top of PVC Casing 13.41 7.89 5.52 32S/12E-24B02 North Beach Campground - Middle Paso Robles 7/26/2011 Stove Pipe Top of PVC Casing 13.41 7.07 6.34

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/20/2011 Stove Pipe Top of PVC Casing 13.41 7.28 6.1332S/12E-24B02 North Beach Campground - Middle Paso Robles 1/24/2011 Stove Pipe Top of PVC Casing 13.41 7.89 5.5232S/12E-24B02 North Beach Campground - Middle Paso Robles 10/21/2010 Stove Pipe Top of PVC Casing 13.41 6.79 6.62 32S/12E-24B02 North Beach Campground - Middle Paso Robles 7/27/2010 Stove Pipe Top of PVC Casing 13.41 6.53 6.8832S/12E-24B02 North Beach Campground - Middle Paso Robles 4/27/2010 Stove Pipe Top of PVC Casing 13.41 6.36 7.0532S/12E-24B02 North Beach Campground - Middle Paso Robles 1/27/2010 Stove Pipe Top of PVC Casing 13.41 7.32 6.0932S/12E-24B02 North Beach Campground - Middle Paso Robles 10/19/2009 Stove Pipe Top of PVC Casing 13.41 8.44 4.97 32S/12E-24B02 North Beach Campground - Middle Paso Robles 8/20/2009 Stove Pipe Top of PVC Casing 13.41 6.61 6.8032S/12E-24B02 North Beach Campground - Middle Paso Robles 5/12/2009 Stove Pipe Top of PVC Casing 13.41 5.96 7.4532S/12E-24B02 North Beach Campground - Middle Paso Robles 10/15/2008 Stove Pipe Top of PVC Casing 13.41 6.16 7.25 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/15/2008 Stove Pipe Top of PVC Casing 13.41 7.53 5.8832S/12E-24B02 North Beach Campground - Middle Paso Robles 10/18/2007 Stove Pipe Top of PVC Casing 13.41 6.95 6.46 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/17/2007 Stove Pipe Top of PVC Casing 13.41 7.36 6.0532S/12E-24B02 North Beach Campground - Middle Paso Robles 10/19/2006 Stove Pipe Top of PVC Casing 13.41 7.30 6.11 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/25/2006 Stove Pipe Top of PVC Casing 13.41 8.05 5.3632S/12E-24B02 North Beach Campground - Middle Paso Robles 10/7/2005 Stove Pipe Top of PVC Casing 13.41 7.60 5.81 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/28/2005 Stove Pipe Top of PVC Casing 13.41 9.78 3.6332S/12E-24B02 North Beach Campground - Middle Paso Robles 10/29/2004 Stove Pipe Top of PVC Casing 13.41 7.70 5.71 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/8/2004 Stove Pipe Top of PVC Casing 13.41 7.20 6.2132S/12E-24B02 North Beach Campground - Middle Paso Robles 10/14/2002 Stove Pipe Top of PVC Casing 13.41 7.70 5.71 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/9/2002 Stove Pipe Top of PVC Casing 13.41 7.40 6.0132S/12E-24B02 North Beach Campground - Middle Paso Robles 10/5/2001 Stove Pipe Top of PVC Casing 13.41 8.30 5.1132S/12E-24B02 North Beach Campground - Middle Paso Robles 4/23/2001 Stove Pipe Top of PVC Casing 13.41 7.90 5.5132S/12E-24B02 North Beach Campground - Middle Paso Robles 4/24/2000 Stove Pipe Top of PVC Casing 13.41 7.30 6.1132S/12E-24B02 North Beach Campground - Middle Paso Robles 10/29/1999 Stove Pipe Top of PVC Casing 13.41 7.80 5.61 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/15/1999 Stove Pipe Top of PVC Casing 13.41 8.40 5.0132S/12E-24B02 North Beach Campground - Middle Paso Robles 10/20/1998 Stove Pipe Top of PVC Casing 13.41 7.50 5.91 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/23/1998 Stove Pipe Top of PVC Casing 13.41 8.40 5.0132S/12E-24B02 North Beach Campground - Middle Paso Robles 10/22/1997 Stove Pipe Top of PVC Casing 13.41 8.00 5.41 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/29/1997 Stove Pipe Top of PVC Casing 13.41 7.11 6.3032S/12E-24B02 North Beach Campground - Middle Paso Robles 10/23/1996 Stove Pipe Top of PVC Casing 13.41 7.02 6.39 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/29/1996 Stove Pipe Top of PVC Casing 13.41 7.50 5.9132S/12E-24B02 North Beach Campground - Middle Paso Robles 10/10/1995 Stove Pipe Top of PVC Casing 13.41 6.90 6.51 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/19/1995 Stove Pipe Top of PVC Casing 13.41 7.31 6.1032S/12E-24B02 North Beach Campground - Middle Paso Robles 11/1/1994 Stove Pipe Top of PVC Casing 13.41 6.82 6.5932S/12E-24B02 North Beach Campground - Middle Paso Robles 4/11/1994 Stove Pipe Top of PVC Casing 13.41 7.16 6.2532S/12E-24B02 North Beach Campground - Middle Paso Robles 10/13/1993 Stove Pipe Top of PVC Casing 13.41 7.21 6.20 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/8/1993 Stove Pipe Top of PVC Casing 13.41 7.47 5.9432S/12E-24B02 North Beach Campground - Middle Paso Robles 11/4/1992 Stove Pipe Top of PVC Casing 13.41 6.10 7.3132S/12E-24B02 North Beach Campground - Middle Paso Robles 4/21/1992 Stove Pipe Top of PVC Casing 13.41 6.35 7.0632S/12E-24B02 North Beach Campground - Middle Paso Robles 10/11/1991 Stove Pipe Top of PVC Casing 13.41 5.84 7.57 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/19/1991 Stove Pipe Top of PVC Casing 13.41 6.48 6.9332S/12E-24B02 North Beach Campground - Middle Paso Robles 10/11/1990 Stove Pipe Top of PVC Casing 13.41 6.04 7.37 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/24/1990 Stove Pipe Top of PVC Casing 13.41 6.16 7.2532S/12E-24B02 North Beach Campground - Middle Paso Robles 10/4/1989 Stove Pipe Top of PVC Casing 13.41 6.39 7.02 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/17/1989 Stove Pipe Top of PVC Casing 13.41 6.57 6.84

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/12E-24B02 North Beach Campground - Middle Paso Robles 10/20/1988 Stove Pipe Top of PVC Casing 13.41 6.30 7.1132S/12E-24B02 North Beach Campground - Middle Paso Robles 4/29/1988 Stove Pipe Top of PVC Casing 13.41 6.84 6.5732S/12E-24B02 North Beach Campground - Middle Paso Robles 4/21/1988 Stove Pipe Top of PVC Casing 13.41 6.77 6.6432S/12E-24B02 North Beach Campground - Middle Paso Robles 10/19/1987 Stove Pipe Top of PVC Casing 13.41 6.73 6.68 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/13/1987 Stove Pipe Top of PVC Casing 13.41 8.02 5.3932S/12E-24B02 North Beach Campground - Middle Paso Robles 10/31/1986 Stove Pipe Top of PVC Casing 13.41 7.00 6.41 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/27/1986 Stove Pipe Top of PVC Casing 13.41 7.05 6.3632S/12E-24B02 North Beach Campground - Middle Paso Robles 10/18/1985 Stove Pipe Top of PVC Casing 13.41 7.20 6.21 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/22/1985 Stove Pipe Top of PVC Casing 13.41 7.40 6.0132S/12E-24B02 North Beach Campground - Middle Paso Robles 10/29/1984 Stove Pipe Top of PVC Casing 13.41 7.44 5.97 32S/12E-24B02 North Beach Campground - Middle Paso Robles 10/28/1983 Stove Pipe Top of PVC Casing 13.41 8.02 5.39 32S/12E-24B02 North Beach Campground - Middle Paso Robles 5/6/1982 Stove Pipe Top of PVC Casing 13.41 7.65 5.7632S/12E-24B02 North Beach Campground - Middle Paso Robles 10/19/1981 Stove Pipe Top of PVC Casing 13.41 7.19 6.22 32S/12E-24B02 North Beach Campground - Middle Paso Robles 4/21/1981 Stove Pipe Top of PVC Casing 13.41 7.66 5.7532S/12E-24B02 North Beach Campground - Middle Paso Robles 10/21/1980 Stove Pipe Top of PVC Casing 13.41 7.20 6.21 32S/12E-24B02 North Beach Campground - Middle Paso Robles 5/9/1980 Stove Pipe Top of PVC Casing 13.41 7.19 6.22 32S/12E-24B02 North Beach Campground - Middle Paso Robles 11/7/1979 Stove Pipe Top of PVC Casing 13.41 7.98 5.4332S/12E-24B02 North Beach Campground - Middle Paso Robles 4/17/1979 Stove Pipe Top of PVC Casing 13.41 7.80 5.6132S/12E-24B02 North Beach Campground - Middle Paso Robles 12/4/1978 Stove Pipe Top of PVC Casing 13.41 8.15 5.2632S/12E-24B02 North Beach Campground - Middle Paso Robles 5/4/1978 Stove Pipe Top of PVC Casing 13.41 8.70 4.7132S/12E-24B02 North Beach Campground - Middle Paso Robles 11/7/1977 Stove Pipe Top of PVC Casing 13.41 7.25 6.1632S/12E-24B02 North Beach Campground - Middle Paso Robles 5/17/1977 Stove Pipe Top of PVC Casing 13.41 7.18 6.2332S/12E-24B02 North Beach Campground - Middle Paso Robles 6/9/1976 Stove Pipe Top of PVC Casing 13.41 0.81 12.60 32S/12E-24B02 North Beach Campground - Middle Paso Robles 1/14/1976 Stove Pipe Top of PVC Casing 13.41 7.70 5.71 32S/12E-24B02 North Beach Campground - Middle Paso Robles 7/7/1975 Stove Pipe Top of PVC Casing 13.41 7.70 5.7132S/12E-24B02 North Beach Campground - Middle Paso Robles 4/17/1975 Stove Pipe Top of PVC Casing 13.41 7.70 5.7132S/12E-24B02 North Beach Campground - Middle Paso Robles 6/7/1974 Stove Pipe Top of PVC Casing 13.41 8.70 4.7132S/12E-24B02 North Beach Campground - Middle Paso Robles 9/20/1973 Stove Pipe Top of PVC Casing 13.41 7.38 6.0332S/12E-24B02 North Beach Campground - Middle Paso Robles 6/29/1972 Stove Pipe Top of PVC Casing 13.41 7.65 5.7632S/12E-24B02 North Beach Campground - Middle Paso Robles 3/2/1972 Stove Pipe Top of PVC Casing 13.41 7.90 5.5132S/12E-24B02 North Beach Campground - Middle Paso Robles 2/29/1972 Stove Pipe Top of PVC Casing 13.41 8.08 5.33 32S/12E-24B02 North Beach Campground - Middle Paso Robles 11/29/1971 Stove Pipe Top of PVC Casing 13.41 7.70 5.71 32S/12E-24B02 North Beach Campground - Middle Paso Robles 8/25/1971 Stove Pipe Top of PVC Casing 13.41 7.30 6.1132S/12E-24B02 North Beach Campground - Middle Paso Robles 6/2/1971 Stove Pipe Top of PVC Casing 13.41 7.60 5.8132S/12E-24B02 North Beach Campground - Middle Paso Robles 12/15/1970 Stove Pipe Top of PVC Casing 13.41 8.05 5.36 32S/12E-24B02 North Beach Campground - Middle Paso Robles 8/4/1970 Stove Pipe Top of PVC Casing 13.41 7.51 5.9032S/12E-24B02 North Beach Campground - Middle Paso Robles 6/3/1970 Stove Pipe Top of PVC Casing 13.41 7.53 5.8832S/12E-24B02 North Beach Campground - Middle Paso Robles 3/27/1970 Stove Pipe Top of PVC Casing 13.41 8.00 5.4132S/12E-24B02 North Beach Campground - Middle Paso Robles 1/29/1970 Stove Pipe Top of PVC Casing 13.41 8.08 5.3332S/12E-24B02 North Beach Campground - Middle Paso Robles 10/3/1969 Stove Pipe Top of PVC Casing 13.41 7.37 6.0432S/12E-24B02 North Beach Campground - Middle Paso Robles 7/23/1969 Stove Pipe Top of PVC Casing 13.41 6.70 6.7132S/12E-24B02 North Beach Campground - Middle Paso Robles 6/24/1969 Stove Pipe Top of PVC Casing 13.41 6.70 6.7132S/12E-24B02 North Beach Campground - Middle Paso Robles 5/22/1969 Stove Pipe Top of PVC Casing 13.41 6.70 6.7132S/12E-24B02 North Beach Campground - Middle Paso Robles 4/18/1969 Stove Pipe Top of PVC Casing 13.41 8.12 5.2932S/12E-24B02 North Beach Campground - Middle Paso Robles 1/15/1969 Stove Pipe Top of PVC Casing 13.41 8.15 5.26 32S/12E-24B02 North Beach Campground - Middle Paso Robles 12/12/1968 Stove Pipe Top of PVC Casing 13.41 7.70 5.71

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/12E-24B02 North Beach Campground - Middle Paso Robles 11/14/1968 Stove Pipe Top of PVC Casing 13.41 1.97 11.4432S/12E-24B02 North Beach Campground - Middle Paso Robles 10/17/1968 Stove Pipe Top of PVC Casing 13.41 7.44 5.97 32S/12E-24B02 North Beach Campground - Middle Paso Robles 9/14/1968 Stove Pipe Top of PVC Casing 13.41 6.45 6.9632S/12E-24B02 North Beach Campground - Middle Paso Robles 8/13/1968 Stove Pipe Top of PVC Casing 13.41 7.18 6.2332S/12E-24B02 North Beach Campground - Middle Paso Robles 7/22/1968 Stove Pipe Top of PVC Casing 13.41 7.05 6.3632S/12E-24B02 North Beach Campground - Middle Paso Robles 6/24/1968 Stove Pipe Top of PVC Casing 13.41 7.20 6.2132S/12E-24B02 North Beach Campground - Middle Paso Robles 5/30/1968 Stove Pipe Top of PVC Casing 13.41 6.05 7.3632S/12E-24B02 North Beach Campground - Middle Paso Robles 4/20/1968 Stove Pipe Top of PVC Casing 13.41 7.65 5.7632S/12E-24B02 North Beach Campground - Middle Paso Robles 3/21/1968 Stove Pipe Top of PVC Casing 13.41 8.19 5.2232S/12E-24B02 North Beach Campground - Middle Paso Robles 2/22/1968 Stove Pipe Top of PVC Casing 13.41 8.38 5.0332S/12E-24B02 North Beach Campground - Middle Paso Robles 1/17/1968 Stove Pipe Top of PVC Casing 13.41 8.95 4.4632S/12E-24B02 North Beach Campground - Middle Paso Robles 12/8/1967 Stove Pipe Top of PVC Casing 13.41 8.25 5.1632S/12E-24B02 North Beach Campground - Middle Paso Robles 11/13/1967 Stove Pipe Top of PVC Casing 13.41 7.75 5.66 32S/12E-24B02 North Beach Campground - Middle Paso Robles 10/11/1967 Stove Pipe Top of PVC Casing 13.41 7.00 6.41 32S/12E-24B02 North Beach Campground - Middle Paso Robles 9/5/1967 Stove Pipe Top of PVC Casing 13.41 7.49 5.9232S/12E-24B02 North Beach Campground - Middle Paso Robles 8/8/1967 Stove Pipe Top of PVC Casing 13.41 7.36 6.05 32S/12E-24B02 North Beach Campground - Middle Paso Robles 7/12/1967 Stove Pipe Top of PVC Casing 13.41 7.99 5.4232S/12E-24B02 North Beach Campground - Middle Paso Robles 6/1/1967 Stove Pipe Top of PVC Casing 13.41 8.50 4.9132S/12E-24B02 North Beach Campground - Middle Paso Robles 5/2/1967 Stove Pipe Top of PVC Casing 13.41 8.50 4.9132S/12E-24B03 North Beach Campground - Deep Careaga 10/21/2025 Stove Pipe Top of PVC Casing 13.33 11.33 2.0032S/12E-24B03 North Beach Campground - Deep Careaga 7/15/2025 Stove Pipe Top of PVC Casing 13.33 10.67 2.66 32S/12E-24B03 North Beach Campground - Deep Careaga 4/14/2025 Stove Pipe Top of PVC Casing 13.33 11.63 1.70 32S/12E-24B03 North Beach Campground - Deep Careaga 1/22/2025 Stove Pipe Top of PVC Casing 13.33 11.53 1.80 32S/12E-24B03 North Beach Campground - Deep Careaga 10/15/2024 Stove Pipe Top of PVC Casing 13.33 11.54 1.7932S/12E-24B03 North Beach Campground - Deep Careaga 7/9/2024 Stove Pipe Top of PVC Casing 13.33 11.43 1.90 32S/12E-24B03 North Beach Campground - Deep Careaga 4/17/2024 Stove Pipe Top of PVC Casing 13.33 11.94 1.39 32S/12E-24B03 North Beach Campground - Deep Careaga 1/9/2024 Stove Pipe Top of PVC Casing 13.33 12.29 1.04 32S/12E-24B03 North Beach Campground - Deep Careaga 10/10/2023 Stove Pipe Top of PVC Casing 13.33 11.72 1.6132S/12E-24B03 North Beach Campground - Deep Careaga 7/4/2023 Stove Pipe Top of PVC Casing 13.33 11.35 1.98 32S/12E-24B03 North Beach Campground - Deep Careaga 4/11/2023 Stove Pipe Top of PVC Casing 13.33 10.99 2.34 32S/12E-24B03 North Beach Campground - Deep Careaga 2/7/2023 Stove Pipe Top of PVC Casing 13.33 10.89 2.44 32S/12E-24B03 North Beach Campground - Deep Careaga 10/3/2022 Stove Pipe Top of PVC Casing 13.33 9.15 4.18 32S/12E-24B03 North Beach Campground - Deep Careaga 7/11/2022 Stove Pipe Top of PVC Casing 13.33 8.54 4.79 32S/12E-24B03 North Beach Campground - Deep Careaga 4/5/2022 Stove Pipe Top of PVC Casing 13.33 9.22 4.11 32S/12E-24B03 North Beach Campground - Deep Careaga 1/4/2022 Stove Pipe Top of PVC Casing 13.33 10.69 2.64 32S/12E-24B03 North Beach Campground - Deep Careaga 10/5/2021 Stove Pipe Top of PVC Casing 13.33 9.56 3.77 32S/12E-24B03 North Beach Campground - Deep Careaga 7/13/2021 Stove Pipe Top of PVC Casing 13.33 9.25 4.08 32S/12E-24B03 North Beach Campground - Deep Careaga 4/6/2021 Stove Pipe Top of PVC Casing 13.33 10.25 3.08 32S/12E-24B03 North Beach Campground - Deep Careaga 1/6/2021 Stove Pipe Top of PVC Casing 13.33 11.12 2.21 32S/12E-24B03 North Beach Campground - Deep Careaga 10/7/2020 Stove Pipe Top of PVC Casing 13.33 9.42 3.91 32S/12E-24B03 North Beach Campground - Deep Careaga 7/6/2020 Stove Pipe Top of PVC Casing 13.33 10.58 2.75 32S/12E-24B03 North Beach Campground - Deep Careaga 4/7/2020 Stove Pipe Top of PVC Casing 13.33 11.36 1.97 32S/12E-24B03 North Beach Campground - Deep Careaga 1/7/2020 Stove Pipe Top of PVC Casing 13.33 10.81 2.52 32S/12E-24B03 North Beach Campground - Deep Careaga 10/9/2019 Stove Pipe Top of PVC Casing 13.33 10.22 3.11 32S/12E-24B03 North Beach Campground - Deep Careaga 7/9/2019 Stove Pipe Top of PVC Casing 13.33 10.19 3.14 32S/12E-24B03 North Beach Campground - Deep Careaga 4/9/2019 Stove Pipe Top of PVC Casing 13.33 10.50 2.83

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/12E-24B03 North Beach Campground - Deep Careaga 1/8/2019 Stove Pipe Top of PVC Casing 13.33 10.46 2.8732S/12E-24B03 North Beach Campground - Deep Careaga 10/9/2018 Stove Pipe Top of PVC Casing 13.33 9.78 3.55 32S/12E-24B03 North Beach Campground - Deep Careaga 7/10/2018 Stove Pipe Top of PVC Casing 13.33 9.40 3.93 32S/12E-24B03 North Beach Campground - Deep Careaga 4/10/2018 Stove Pipe Top of PVC Casing 13.33 11.03 2.30 32S/12E-24B03 North Beach Campground - Deep Careaga 1/10/2018 Stove Pipe Top of PVC Casing 13.33 11.07 2.26 32S/12E-24B03 North Beach Campground - Deep Careaga 10/10/2017 Stove Pipe Top of PVC Casing 13.33 9.98 3.3532S/12E-24B03 North Beach Campground - Deep Careaga 7/11/2017 Stove Pipe Top of PVC Casing 13.33 9.83 3.50 32S/12E-24B03 North Beach Campground - Deep Careaga 4/11/2017 Stove Pipe Top of PVC Casing 13.33 10.68 2.65 32S/12E-24B03 North Beach Campground - Deep Careaga 1/10/2017 Stove Pipe Top of PVC Casing 13.33 10.99 2.34 32S/12E-24B03 North Beach Campground - Deep Careaga 10/12/2016 Stove Pipe Top of PVC Casing 13.33 8.88 4.4532S/12E-24B03 North Beach Campground - Deep Careaga 7/19/2016 Stove Pipe Top of PVC Casing 13.33 8.48 4.85 32S/12E-24B03 North Beach Campground - Deep Careaga 4/12/2016 Stove Pipe Top of PVC Casing 13.33 9.77 3.56 32S/12E-24B03 North Beach Campground - Deep Careaga 1/12/2016 Stove Pipe Top of PVC Casing 13.33 10.57 2.76 32S/12E-24B03 North Beach Campground - Deep Careaga 10/13/2015 Stove Pipe Top of PVC Casing 13.33 8.96 4.3732S/12E-24B03 North Beach Campground - Deep Careaga 7/14/2015 Stove Pipe Top of PVC Casing 13.33 8.82 4.51 32S/12E-24B03 North Beach Campground - Deep Careaga 4/14/2015 Stove Pipe Top of PVC Casing 13.33 8.72 4.61 32S/12E-24B03 North Beach Campground - Deep Careaga 1/13/2015 Stove Pipe Top of PVC Casing 13.33 9.99 3.34 32S/12E-24B03 North Beach Campground - Deep Careaga 10/14/2014 Stove Pipe Top of PVC Casing 13.33 8.98 4.3532S/12E-24B03 North Beach Campground - Deep Careaga 7/29/2014 Stove Pipe Top of PVC Casing 13.33 8.80 4.53 32S/12E-24B03 North Beach Campground - Deep Careaga 6/4/2014 Stove Pipe Top of PVC Casing 13.33 6.25 7.08 32S/12E-24B03 North Beach Campground - Deep Careaga 5/5/2014 Stove Pipe Top of PVC Casing 13.33 8.22 5.11 32S/12E-24B03 North Beach Campground - Deep Careaga 4/15/2014 Stove Pipe Top of PVC Casing 13.33 9.64 3.69 32S/12E-24B03 North Beach Campground - Deep Careaga 1/14/2014 Stove Pipe Top of PVC Casing 13.33 9.77 3.56 32S/12E-24B03 North Beach Campground - Deep Careaga 10/14/2013 Stove Pipe Top of PVC Casing 13.33 9.08 4.2532S/12E-24B03 North Beach Campground - Deep Careaga 7/9/2013 Stove Pipe Top of PVC Casing 13.33 9.10 4.23 32S/12E-24B03 North Beach Campground - Deep Careaga 4/10/2013 Stove Pipe Top of PVC Casing 13.33 10.17 3.16 32S/12E-24B03 North Beach Campground - Deep Careaga 1/14/2013 Stove Pipe Top of PVC Casing 13.33 11.10 2.23 32S/12E-24B03 North Beach Campground - Deep Careaga 10/29/2012 Stove Pipe Top of PVC Casing 13.33 10.57 2.7632S/12E-24B03 North Beach Campground - Deep Careaga 7/23/2012 Stove Pipe Top of PVC Casing 13.33 10.60 2.73 32S/12E-24B03 North Beach Campground - Deep Careaga 4/18/2012 Stove Pipe Top of PVC Casing 13.33 11.65 1.68 32S/12E-24B03 North Beach Campground - Deep Careaga 1/12/2012 Stove Pipe Top of PVC Casing 13.33 11.43 1.90 32S/12E-24B03 North Beach Campground - Deep Careaga 11/21/2011 Stove Pipe Top of PVC Casing 13.33 10.65 2.6832S/12E-24B03 North Beach Campground - Deep Careaga 7/26/2011 Stove Pipe Top of PVC Casing 13.33 10.41 2.92 32S/12E-24B03 North Beach Campground - Deep Careaga 4/20/2011 Stove Pipe Top of PVC Casing 13.33 10.33 3.00 32S/12E-24B03 North Beach Campground - Deep Careaga 1/24/2011 Stove Pipe Top of PVC Casing 13.33 10.93 2.40 32S/12E-24B03 North Beach Campground - Deep Careaga 10/21/2010 Stove Pipe Top of PVC Casing 13.33 8.98 4.3532S/12E-24B03 North Beach Campground - Deep Careaga 7/27/2010 Stove Pipe Top of PVC Casing 13.33 9.04 4.29 32S/12E-24B03 North Beach Campground - Deep Careaga 4/27/2010 Stove Pipe Top of PVC Casing 13.33 9.27 4.06 32S/12E-24B03 North Beach Campground - Deep Careaga 1/27/2010 Stove Pipe Top of PVC Casing 13.33 9.76 3.57 32S/12E-24B03 North Beach Campground - Deep Careaga 10/19/2009 Stove Pipe Top of PVC Casing 13.33 9.89 3.44 32S/12E-24B03 North Beach Campground - Deep Careaga 8/19/2009 Stove Pipe Top of PVC Casing 13.33 6.52 6.81 32S/12E-24B03 North Beach Campground - Deep Careaga 5/12/2009 Stove Pipe Top of PVC Casing 13.33 7.52 5.81 32S/12E-24B03 North Beach Campground - Deep Careaga 10/15/2008 Stove Pipe Top of PVC Casing 13.33 7.57 5.7632S/12E-24B03 North Beach Campground - Deep Careaga 4/15/2008 Stove Pipe Top of PVC Casing 13.33 6.90 6.43 32S/12E-24B03 North Beach Campground - Deep Careaga 10/18/2007 Stove Pipe Top of PVC Casing 13.33 5.30 8.03 32S/12E-24B03 North Beach Campground - Deep Careaga 4/17/2007 Stove Pipe Top of PVC Casing 13.33 6.90 6.43

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/12E-24B03 North Beach Campground - Deep Careaga 10/19/2006 Stove Pipe Top of PVC Casing 13.33 8.25 5.0832S/12E-24B03 North Beach Campground - Deep Careaga 4/25/2006 Stove Pipe Top of PVC Casing 13.33 10.55 2.78 32S/12E-24B03 North Beach Campground - Deep Careaga 10/7/2005 Stove Pipe Top of PVC Casing 13.33 7.50 5.83 32S/12E-24B03 North Beach Campground - Deep Careaga 4/28/2005 Stove Pipe Top of PVC Casing 13.33 7.55 5.78 32S/12E-24B03 North Beach Campground - Deep Careaga 10/27/2004 Stove Pipe Top of PVC Casing 13.33 6.70 6.6332S/12E-24B03 North Beach Campground - Deep Careaga 4/8/2004 Stove Pipe Top of PVC Casing 13.33 9.80 3.53 32S/12E-24B03 North Beach Campground - Deep Careaga 10/14/2002 Stove Pipe Top of PVC Casing 13.33 7.90 5.4332S/12E-24B03 North Beach Campground - Deep Careaga 4/9/2002 Stove Pipe Top of PVC Casing 13.33 7.80 5.53 32S/12E-24B03 North Beach Campground - Deep Careaga 10/5/2001 Stove Pipe Top of PVC Casing 13.33 10.50 2.83 32S/12E-24B03 North Beach Campground - Deep Careaga 4/23/2001 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 4/24/2000 Stove Pipe Top of PVC Casing 13.33 8.00 5.33 32S/12E-24B03 North Beach Campground - Deep Careaga 10/29/1999 Stove Pipe Top of PVC Casing 13.33 10.70 2.6332S/12E-24B03 North Beach Campground - Deep Careaga 4/15/1999 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 10/20/1998 Stove Pipe Top of PVC Casing 13.33 8.90 4.4332S/12E-24B03 North Beach Campground - Deep Careaga 10/29/1997 Stove Pipe Top of PVC Casing 13.33 8.55 4.78 32S/12E-24B03 North Beach Campground - Deep Careaga 4/29/1997 Stove Pipe Top of PVC Casing 13.33 8.02 5.31 32S/12E-24B03 North Beach Campground - Deep Careaga 10/23/1996 Stove Pipe Top of PVC Casing 13.33 7.02 6.3132S/12E-24B03 North Beach Campground - Deep Careaga 4/29/1996 Stove Pipe Top of PVC Casing 13.33 9.10 4.23 32S/12E-24B03 North Beach Campground - Deep Careaga 10/10/1995 Stove Pipe Top of PVC Casing 13.33 7.90 5.4332S/12E-24B03 North Beach Campground - Deep Careaga 4/19/1995 Stove Pipe Top of PVC Casing 13.33 10.20 3.13 32S/12E-24B03 North Beach Campground - Deep Careaga 11/1/1994 Stove Pipe Top of PVC Casing 13.33 7.75 5.58 32S/12E-24B03 North Beach Campground - Deep Careaga 4/11/1994 Stove Pipe Top of PVC Casing 13.33 9.39 3.94 32S/12E-24B03 North Beach Campground - Deep Careaga 10/13/1993 Stove Pipe Top of PVC Casing 13.33 8.42 4.9132S/12E-24B03 North Beach Campground - Deep Careaga 4/8/1993 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 11/4/1992 Stove Pipe Top of PVC Casing 13.33 6.40 6.93 32S/12E-24B03 North Beach Campground - Deep Careaga 4/21/1992 Stove Pipe Top of PVC Casing 13.33 9.00 4.33 32S/12E-24B03 North Beach Campground - Deep Careaga 10/11/1991 Stove Pipe Top of PVC Casing 13.33 7.10 6.2332S/12E-24B03 North Beach Campground - Deep Careaga 4/19/1991 Stove Pipe Top of PVC Casing 13.33 7.96 5.37 32S/12E-24B03 North Beach Campground - Deep Careaga 10/11/1990 Stove Pipe Top of PVC Casing 13.33 8.05 5.2832S/12E-24B03 North Beach Campground - Deep Careaga 4/24/1990 Stove Pipe Top of PVC Casing 13.33 8.31 5.02 32S/12E-24B03 North Beach Campground - Deep Careaga 10/4/1989 Stove Pipe Top of PVC Casing 13.33 8.48 4.85 32S/12E-24B03 North Beach Campground - Deep Careaga 4/17/1989 Stove Pipe Top of PVC Casing 13.33 7.97 5.36 32S/12E-24B03 North Beach Campground - Deep Careaga 10/20/1988 Stove Pipe Top of PVC Casing 13.33 8.08 5.2532S/12E-24B03 North Beach Campground - Deep Careaga 4/29/1988 Stove Pipe Top of PVC Casing 13.33 8.44 4.89 32S/12E-24B03 North Beach Campground - Deep Careaga 10/19/1987 Stove Pipe Top of PVC Casing 13.33 7.34 5.9932S/12E-24B03 North Beach Campground - Deep Careaga 4/13/1987 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 10/31/1986 Stove Pipe Top of PVC Casing 13.33 7.52 5.8132S/12E-24B03 North Beach Campground - Deep Careaga 4/27/1986 Stove Pipe Top of PVC Casing 13.33 7.63 5.70 32S/12E-24B03 North Beach Campground - Deep Careaga 10/18/1985 Stove Pipe Top of PVC Casing 13.33 9.88 3.4532S/12E-24B03 North Beach Campground - Deep Careaga 4/22/1985 Stove Pipe Top of PVC Casing 13.33 10.30 3.03 32S/12E-24B03 North Beach Campground - Deep Careaga 10/29/1984 Stove Pipe Top of PVC Casing 13.33 9.01 4.3232S/12E-24B03 North Beach Campground - Deep Careaga 10/19/1981 Stove Pipe Top of PVC Casing 13.33 10.70 2.6332S/12E-24B03 North Beach Campground - Deep Careaga 4/21/1981 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 10/21/1980 Stove Pipe Top of PVC Casing 13.33 10.70 2.6332S/12E-24B03 North Beach Campground - Deep Careaga 5/9/1980 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 11/7/1979 Stove Pipe Top of PVC Casing 13.33 10.70 2.63

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/12E-24B03 North Beach Campground - Deep Careaga 4/17/1979 Stove Pipe Top of PVC Casing 13.33 10.70 2.6332S/12E-24B03 North Beach Campground - Deep Careaga 12/4/1978 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 5/4/1978 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 11/7/1977 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 5/17/1977 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 6/9/1976 Stove Pipe Top of PVC Casing 13.33 8.80 4.53 32S/12E-24B03 North Beach Campground - Deep Careaga 5/21/1976 Stove Pipe Top of PVC Casing 13.33 9.37 3.96 32S/12E-24B03 North Beach Campground - Deep Careaga 1/14/1976 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 7/7/1975 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 4/1/1975 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 6/7/1974 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 9/20/1973 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 6/29/1972 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 2/29/1972 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 11/29/1971 Stove Pipe Top of PVC Casing 13.33 10.70 2.6332S/12E-24B03 North Beach Campground - Deep Careaga 8/28/1971 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 6/2/1971 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 3/2/1971 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 12/15/1970 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 8/4/1970 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 6/3/1970 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 3/27/1970 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 1/29/1970 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 10/3/1969 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 7/23/1969 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 6/24/1969 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 5/22/1969 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 4/18/1969 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 2/21/1969 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 1/15/1969 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 12/12/1968 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 11/14/1968 Stove Pipe Top of PVC Casing 13.33 10.70 2.6332S/12E-24B03 North Beach Campground - Deep Careaga 10/17/1968 Stove Pipe Top of PVC Casing 13.33 9.98 3.3532S/12E-24B03 North Beach Campground - Deep Careaga 9/14/1968 Stove Pipe Top of PVC Casing 13.33 10.10 3.23 32S/12E-24B03 North Beach Campground - Deep Careaga 8/13/1968 Stove Pipe Top of PVC Casing 13.33 10.42 2.91 32S/12E-24B03 North Beach Campground - Deep Careaga 7/22/1968 Stove Pipe Top of PVC Casing 13.33 10.22 3.11 32S/12E-24B03 North Beach Campground - Deep Careaga 6/24/1968 Stove Pipe Top of PVC Casing 13.33 10.38 2.95 32S/12E-24B03 North Beach Campground - Deep Careaga 5/30/1968 Stove Pipe Top of PVC Casing 13.33 10.32 3.01 32S/12E-24B03 North Beach Campground - Deep Careaga 4/20/1968 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 3/21/1968 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 2/22/1968 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 1/17/1968 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 12/8/1967 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 11/13/1967 Stove Pipe Top of PVC Casing 13.33 10.70 2.6332S/12E-24B03 North Beach Campground - Deep Careaga 10/11/1967 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 9/5/1967 Stove Pipe Top of PVC Casing 13.33 10.70 2.63

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/12E-24B03 North Beach Campground - Deep Careaga 8/8/1967 Stove Pipe Top of PVC Casing 13.33 10.70 2.6332S/12E-24B03 North Beach Campground - Deep Careaga 7/12/1967 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 6/1/1967 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/12E-24B03 North Beach Campground - Deep Careaga 5/2/1967 Stove Pipe Top of PVC Casing 13.33 10.70 2.63 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/21/2025 Stove Pipe Top of PVC Casing 22.76 9.55 13.21 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/15/2025 Stove Pipe Top of PVC Casing 22.76 9.53 13.2332S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/14/2025 Stove Pipe Top of PVC Casing 22.76 10.31 12.45 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/22/2025 Stove Pipe Top of PVC Casing 22.76 10.21 12.55 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/15/2024 Stove Pipe Top of PVC Casing 22.76 9.98 12.78 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/9/2024 Stove Pipe Top of PVC Casing 22.76 10.59 12.17 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/17/2024 Stove Pipe Top of PVC Casing 22.76 11.26 11.50 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/9/2024 Stove Pipe Top of PVC Casing 22.76 10.43 12.33 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/10/2023 Stove Pipe Top of PVC Casing 22.76 9.88 12.88 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/4/2023 Stove Pipe Top of PVC Casing 22.76 10.64 12.12 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/11/2023 Stove Pipe Top of PVC Casing 22.76 11.16 11.60 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 2/7/2023 Stove Pipe Top of PVC Casing 22.76 9.56 13.20 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/3/2022 Stove Pipe Top of PVC Casing 22.76 6.54 16.2232S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/11/2022 Stove Pipe Top of PVC Casing 22.76 6.87 15.8932S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/5/2022 Stove Pipe Top of PVC Casing 22.76 8.18 14.5832S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/4/2022 Stove Pipe Top of PVC Casing 22.76 8.48 14.2832S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/5/2021 Stove Pipe Top of PVC Casing 22.76 6.95 15.8132S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/13/2021 Stove Pipe Top of PVC Casing 22.76 7.80 14.9632S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/6/2021 Stove Pipe Top of PVC Casing 22.76 9.10 13.6632S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/6/2021 Stove Pipe Top of PVC Casing 22.76 8.26 14.5032S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/7/2020 Stove Pipe Top of PVC Casing 22.76 8.27 14.4932S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/6/2020 Stove Pipe Top of PVC Casing 22.76 9.18 13.5832S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/7/2020 Stove Pipe Top of PVC Casing 22.76 10.12 12.64 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/7/2020 Stove Pipe Top of PVC Casing 22.76 9.36 13.4032S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/9/2019 Stove Pipe Top of PVC Casing 22.76 8.38 14.3832S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/9/2019 Stove Pipe Top of PVC Casing 22.76 9.56 13.2032S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/9/2019 Stove Pipe Top of PVC Casing 22.76 10.13 12.63 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/8/2019 Stove Pipe Top of PVC Casing 22.76 8.62 14.1432S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/9/2018 Stove Pipe Top of PVC Casing 22.76 7.93 14.8332S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/10/2018 Stove Pipe Top of PVC Casing 22.76 8.35 14.4132S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/10/2018 Stove Pipe Top of PVC Casing 22.76 9.13 13.6332S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/10/2018 Stove Pipe Top of PVC Casing 22.76 8.76 14.0032S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/10/2017 Stove Pipe Top of PVC Casing 22.76 8.51 14.25 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/11/2017 Stove Pipe Top of PVC Casing 22.76 9.43 13.3332S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/11/2017 Stove Pipe Top of PVC Casing 22.76 9.91 12.8532S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/10/2017 Stove Pipe Top of PVC Casing 22.76 9.17 13.5932S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/12/2016 Stove Pipe Top of PVC Casing 22.76 6.08 16.68 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/19/2016 Stove Pipe Top of PVC Casing 22.76 6.74 16.0232S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/12/2016 Stove Pipe Top of PVC Casing 22.76 8.33 14.4332S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/12/2016 Stove Pipe Top of PVC Casing 22.76 8.16 14.6032S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/13/2015 Stove Pipe Top of PVC Casing 22.76 6.05 16.71 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/14/2015 Stove Pipe Top of PVC Casing 22.76 6.23 16.53

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/14/2015 Stove Pipe Top of PVC Casing 22.76 7.15 15.6132S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/13/2015 Stove Pipe Top of PVC Casing 22.76 7.75 15.0132S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/14/2014 Stove Pipe Top of PVC Casing 22.76 6.11 16.65 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/29/2014 Stove Pipe Top of PVC Casing 22.76 6.05 16.7132S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 6/4/2014 Stove Pipe Top of PVC Casing 22.76 6.34 16.4232S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/15/2014 Stove Pipe Top of PVC Casing 22.76 7.60 15.1632S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/14/2014 Stove Pipe Top of PVC Casing 22.76 6.58 16.1832S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/14/2013 Stove Pipe Top of PVC Casing 22.76 6.09 16.67 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/9/2013 Stove Pipe Top of PVC Casing 22.76 6.99 15.7732S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/10/2013 Stove Pipe Top of PVC Casing 22.76 8.58 14.1832S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/14/2013 Stove Pipe Top of PVC Casing 22.76 8.80 13.9632S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/30/2012 Stove Pipe Top of PVC Casing 22.76 8.21 14.55 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/24/2012 Stove Pipe Top of PVC Casing 22.76 9.16 13.6032S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/18/2012 Stove Pipe Top of PVC Casing 22.76 9.74 13.0232S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/10/2012 Stove Pipe Top of PVC Casing 22.76 9.36 13.4032S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 11/21/2011 Stove Pipe Top of PVC Casing 22.76 9.38 13.38 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/26/2011 Stove Pipe Top of PVC Casing 22.76 9.66 13.1032S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/20/2011 Stove Pipe Top of PVC Casing 22.76 10.34 12.42 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/24/2011 Stove Pipe Top of PVC Casing 22.76 9.83 12.9332S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/21/2010 Stove Pipe Top of PVC Casing 22.76 6.61 16.15 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/26/2010 Stove Pipe Top of PVC Casing 22.76 7.48 15.2832S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/27/2010 Stove Pipe Top of PVC Casing 22.76 12.14 10.62 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/28/2010 Stove Pipe Top of PVC Casing 22.76 10.43 12.33 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/19/2009 Stove Pipe Top of PVC Casing 22.76 8.83 13.93 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 8/19/2009 Stove Pipe Top of PVC Casing 22.76 8.82 13.9432S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 5/12/2009 Stove Pipe Top of PVC Casing 22.76 10.78 11.98 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/7/2009 Stove Pipe Top of PVC Casing 22.76 11.49 11.27 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/15/2008 Stove Pipe Top of PVC Casing 22.76 7.63 15.13 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/19/2006 Stove Pipe Top of PVC Casing 22.76 10.71 12.05 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/25/2006 Stove Pipe Top of PVC Casing 22.76 11.61 11.15 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/7/2005 Stove Pipe Top of PVC Casing 22.76 10.41 12.35 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/28/2005 Stove Pipe Top of PVC Casing 22.76 12.91 9.85 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/27/2004 Stove Pipe Top of PVC Casing 22.76 8.96 13.80 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/8/2004 Stove Pipe Top of PVC Casing 22.76 12.26 10.50 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/8/2003 Stove Pipe Top of PVC Casing 22.76 8.26 14.5032S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/14/2002 Stove Pipe Top of PVC Casing 22.76 8.96 13.80 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/9/2002 Stove Pipe Top of PVC Casing 22.76 13.16 9.60 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/5/2001 Stove Pipe Top of PVC Casing 22.76 11.66 11.10 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/23/2001 Stove Pipe Top of PVC Casing 22.76 14.26 8.50 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/16/2000 Stove Pipe Top of PVC Casing 22.76 11.56 11.20 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/24/2000 Stove Pipe Top of PVC Casing 22.76 13.16 9.60 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/29/1999 Stove Pipe Top of PVC Casing 22.76 11.66 11.10 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/15/1999 Stove Pipe Top of PVC Casing 22.76 14.76 8.00 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/20/1998 Stove Pipe Top of PVC Casing 22.76 12.46 10.30 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/23/1998 Stove Pipe Top of PVC Casing 22.76 14.36 8.40 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/22/1997 Stove Pipe Top of PVC Casing 22.76 11.09 11.67

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/29/1997 Stove Pipe Top of PVC Casing 22.76 12.95 9.8132S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/23/1996 Stove Pipe Top of PVC Casing 22.76 11.46 11.30 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/29/1996 Stove Pipe Top of PVC Casing 22.76 12.66 10.10 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/11/1995 Stove Pipe Top of PVC Casing 22.76 11.46 11.30 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/19/1995 Stove Pipe Top of PVC Casing 22.76 13.96 8.80 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 11/1/1994 Stove Pipe Top of PVC Casing 22.76 10.66 12.10 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/11/1994 Stove Pipe Top of PVC Casing 22.76 12.26 10.50 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/13/1993 Stove Pipe Top of PVC Casing 22.76 11.30 11.46 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/8/1993 Stove Pipe Top of PVC Casing 22.76 13.15 9.61 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 11/4/1992 Stove Pipe Top of PVC Casing 22.76 10.66 12.10 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/21/1992 Stove Pipe Top of PVC Casing 22.76 12.46 10.30 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/11/1991 Stove Pipe Top of PVC Casing 22.76 9.79 12.97 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/19/1991 Stove Pipe Top of PVC Casing 22.76 11.11 11.65 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/11/1990 Stove Pipe Top of PVC Casing 22.76 8.26 14.50 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/24/1990 Stove Pipe Top of PVC Casing 22.76 10.81 11.95 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/4/1989 Stove Pipe Top of PVC Casing 22.76 9.64 13.12 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/17/1989 Stove Pipe Top of PVC Casing 22.76 11.34 11.42 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/20/1988 Stove Pipe Top of PVC Casing 22.76 9.80 12.96 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/29/1988 Stove Pipe Top of PVC Casing 22.76 11.50 11.26 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/21/1988 Stove Pipe Top of PVC Casing 22.76 11.43 11.33 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/19/1987 Stove Pipe Top of PVC Casing 22.76 10.07 12.69 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/13/1987 Stove Pipe Top of PVC Casing 22.76 11.85 10.91 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/31/1986 Stove Pipe Top of PVC Casing 22.76 10.97 11.79 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/15/1986 Stove Pipe Top of PVC Casing 22.76 12.11 10.65 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/18/1985 Stove Pipe Top of PVC Casing 22.76 10.01 12.75 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/22/1985 Stove Pipe Top of PVC Casing 22.76 12.06 10.70 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/15/1984 Stove Pipe Top of PVC Casing 22.76 11.84 10.92 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/28/1983 Stove Pipe Top of PVC Casing 22.76 13.11 9.65 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 5/6/1982 Stove Pipe Top of PVC Casing 22.76 13.02 9.74 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/19/1981 Stove Pipe Top of PVC Casing 22.76 11.73 11.03 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/21/1981 Stove Pipe Top of PVC Casing 22.76 13.12 9.64 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/10/1980 Stove Pipe Top of PVC Casing 22.76 11.76 11.00 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 5/9/1980 Stove Pipe Top of PVC Casing 22.76 12.63 10.13 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 11/7/1979 Stove Pipe Top of PVC Casing 22.76 11.95 10.81 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/17/1979 Stove Pipe Top of PVC Casing 22.76 12.97 9.79 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 12/4/1978 Stove Pipe Top of PVC Casing 22.76 12.75 10.01 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/24/1978 Stove Pipe Top of PVC Casing 22.76 13.66 9.10 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 11/7/1977 Stove Pipe Top of PVC Casing 22.76 10.19 12.57 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 5/17/1977 Stove Pipe Top of PVC Casing 22.76 11.07 11.69 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 6/9/1976 Stove Pipe Top of PVC Casing 22.76 10.91 11.85 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/14/1976 Stove Pipe Top of PVC Casing 22.76 11.76 11.00 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/4/1976 Stove Pipe Top of PVC Casing 22.76 12.16 10.60 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/7/1975 Stove Pipe Top of PVC Casing 22.76 9.74 13.0232S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/1/1975 Stove Pipe Top of PVC Casing 22.76 13.16 9.60 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 6/7/1974 Stove Pipe Top of PVC Casing 22.76 13.16 9.60 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/1/1974 Stove Pipe Top of PVC Casing 22.76 12.66 10.10

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/20/1973 Stove Pipe Top of PVC Casing 22.76 11.49 11.2732S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 6/29/1972 Stove Pipe Top of PVC Casing 22.76 7.16 15.6032S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 2/23/1972 Stove Pipe Top of PVC Casing 22.76 13.16 9.60 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 11/29/1971 Stove Pipe Top of PVC Casing 22.76 12.06 10.70 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 8/26/1971 Stove Pipe Top of PVC Casing 22.76 11.73 11.03 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 6/2/1971 Stove Pipe Top of PVC Casing 22.76 12.22 10.54 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 3/2/1971 Stove Pipe Top of PVC Casing 22.76 12.87 9.89 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 12/15/1970 Stove Pipe Top of PVC Casing 22.76 12.60 10.16 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 8/4/1970 Stove Pipe Top of PVC Casing 22.76 4.16 18.6032S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 6/3/1970 Stove Pipe Top of PVC Casing 22.76 9.16 13.6032S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 3/27/1970 Stove Pipe Top of PVC Casing 22.76 11.09 11.67 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/29/1970 Stove Pipe Top of PVC Casing 22.76 11.36 11.40 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/3/1969 Stove Pipe Top of PVC Casing 22.76 8.56 14.2032S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/23/1969 Stove Pipe Top of PVC Casing 22.76 9.41 13.3532S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 6/24/1969 Stove Pipe Top of PVC Casing 22.76 10.23 12.53 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 5/22/1969 Stove Pipe Top of PVC Casing 22.76 11.00 11.76 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/18/1969 Stove Pipe Top of PVC Casing 22.76 11.92 10.84 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 3/20/1969 Stove Pipe Top of PVC Casing 22.76 12.83 9.93 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 2/21/1969 Stove Pipe Top of PVC Casing 22.76 11.53 11.23 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/15/1969 Stove Pipe Top of PVC Casing 22.76 9.56 13.2032S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 12/12/1968 Stove Pipe Top of PVC Casing 22.76 8.09 14.67 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 11/14/1968 Stove Pipe Top of PVC Casing 22.76 6.88 15.88 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/17/1968 Stove Pipe Top of PVC Casing 22.76 5.79 16.97 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 9/14/1968 Stove Pipe Top of PVC Casing 22.76 4.36 18.4032S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 8/13/1968 Stove Pipe Top of PVC Casing 22.76 5.20 17.5632S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/22/1968 Stove Pipe Top of PVC Casing 22.76 5.46 17.3032S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 6/24/1968 Stove Pipe Top of PVC Casing 22.76 6.21 16.5532S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 5/30/1968 Stove Pipe Top of PVC Casing 22.76 17.69 5.07 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 4/20/1968 Stove Pipe Top of PVC Casing 22.76 9.65 13.1132S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 3/21/1968 Stove Pipe Top of PVC Casing 22.76 11.06 11.70 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 2/22/1968 Stove Pipe Top of PVC Casing 22.76 10.87 11.89 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 1/17/1968 Stove Pipe Top of PVC Casing 22.76 10.49 12.27 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 12/8/1967 Stove Pipe Top of PVC Casing 22.76 9.79 12.9732S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 11/13/1967 Stove Pipe Top of PVC Casing 22.76 7.80 14.96 32S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 10/9/1967 Stove Pipe Top of PVC Casing 22.76 7.75 15.0132S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 9/5/1967 Stove Pipe Top of PVC Casing 22.76 7.82 14.9432S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 8/8/1967 Stove Pipe Top of PVC Casing 22.76 8.12 14.6432S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 7/12/1967 Stove Pipe Top of PVC Casing 22.76 8.87 13.8932S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 6/1/1967 Stove Pipe Top of PVC Casing 22.76 9.96 12.8032S/13E-30F01 Highway 1 - Shallow Alluvium/ Paso Robles 5/2/1967 Stove Pipe Top of PVC Casing 22.76 10.96 11.80 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/21/2025 Stove Pipe Top of PVC Casing 22.79 8.77 14.0232S/13E-30F02 Highway 1 - Middle Paso Robles 7/15/2025 Stove Pipe Top of PVC Casing 22.79 7.72 15.07 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/14/2025 Stove Pipe Top of PVC Casing 22.79 9.43 13.36 32S/13E-30F02 Highway 1 - Middle Paso Robles 1/22/2025 Stove Pipe Top of PVC Casing 22.79 8.75 14.04 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/15/2024 Stove Pipe Top of PVC Casing 22.79 9.53 13.26 32S/13E-30F02 Highway 1 - Middle Paso Robles 7/9/2024 Stove Pipe Top of PVC Casing 22.79 9.07 13.72

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/13E-30F02 Highway 1 - Middle Paso Robles 4/17/2024 Stove Pipe Top of PVC Casing 22.79 9.83 12.9632S/13E-30F02 Highway 1 - Middle Paso Robles 1/9/2024 Stove Pipe Top of PVC Casing 22.79 10.04 12.7532S/13E-30F02 Highway 1 - Middle Paso Robles 10/10/2023 Stove Pipe Top of PVC Casing 22.79 9.19 13.6032S/13E-30F02 Highway 1 - Middle Paso Robles 7/4/2023 Stove Pipe Top of PVC Casing 22.79 9.03 13.76 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/11/2023 Stove Pipe Top of PVC Casing 22.79 9.39 13.40 32S/13E-30F02 Highway 1 - Middle Paso Robles 2/7/2023 Stove Pipe Top of PVC Casing 22.79 8.82 13.97 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/3/2022 Stove Pipe Top of PVC Casing 22.79 6.07 16.72 32S/13E-30F02 Highway 1 - Middle Paso Robles 7/11/2022 Stove Pipe Top of PVC Casing 22.79 5.96 16.83 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/5/2022 Stove Pipe Top of PVC Casing 22.79 6.41 16.38 32S/13E-30F02 Highway 1 - Middle Paso Robles 1/4/2022 Stove Pipe Top of PVC Casing 22.79 7.90 14.89 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/5/2021 Stove Pipe Top of PVC Casing 22.79 6.73 16.06 32S/13E-30F02 Highway 1 - Middle Paso Robles 7/13/2021 Stove Pipe Top of PVC Casing 22.79 6.07 16.72 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/6/2021 Stove Pipe Top of PVC Casing 22.79 8.29 14.50 32S/13E-30F02 Highway 1 - Middle Paso Robles 1/6/2021 Stove Pipe Top of PVC Casing 22.79 7.20 15.59 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/7/2020 Stove Pipe Top of PVC Casing 22.79 7.37 15.42 32S/13E-30F02 Highway 1 - Middle Paso Robles 7/6/2020 Stove Pipe Top of PVC Casing 22.79 8.98 13.81 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/7/2020 Stove Pipe Top of PVC Casing 22.79 8.94 13.85 32S/13E-30F02 Highway 1 - Middle Paso Robles 1/7/2020 Stove Pipe Top of PVC Casing 22.79 8.17 14.62 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/9/2019 Stove Pipe Top of PVC Casing 22.79 7.61 15.18 32S/13E-30F02 Highway 1 - Middle Paso Robles 7/9/2019 Stove Pipe Top of PVC Casing 22.79 8.26 14.53 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/9/2019 Stove Pipe Top of PVC Casing 22.79 8.29 14.50 32S/13E-30F02 Highway 1 - Middle Paso Robles 1/8/2019 Stove Pipe Top of PVC Casing 22.79 8.05 14.74 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/9/2018 Stove Pipe Top of PVC Casing 22.79 7.22 15.57 32S/13E-30F02 Highway 1 - Middle Paso Robles 7/10/2018 Stove Pipe Top of PVC Casing 22.79 7.26 15.53 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/10/2018 Stove Pipe Top of PVC Casing 22.79 8.54 14.25 32S/13E-30F02 Highway 1 - Middle Paso Robles 1/10/2018 Stove Pipe Top of PVC Casing 22.79 8.37 14.42 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/10/2017 Stove Pipe Top of PVC Casing 22.79 7.71 15.0832S/13E-30F02 Highway 1 - Middle Paso Robles 7/11/2017 Stove Pipe Top of PVC Casing 22.79 7.86 14.93 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/11/2017 Stove Pipe Top of PVC Casing 22.79 8.89 13.90 32S/13E-30F02 Highway 1 - Middle Paso Robles 1/10/2017 Stove Pipe Top of PVC Casing 22.79 8.63 14.16 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/12/2016 Stove Pipe Top of PVC Casing 22.79 5.81 16.98 32S/13E-30F02 Highway 1 - Middle Paso Robles 7/19/2016 Stove Pipe Top of PVC Casing 22.79 5.53 17.26 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/12/2016 Stove Pipe Top of PVC Casing 22.79 7.18 15.61 32S/13E-30F02 Highway 1 - Middle Paso Robles 1/12/2016 Stove Pipe Top of PVC Casing 22.79 7.87 14.92 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/13/2015 Stove Pipe Top of PVC Casing 22.79 5.87 16.9232S/13E-30F02 Highway 1 - Middle Paso Robles 7/14/2015 Stove Pipe Top of PVC Casing 22.79 5.72 17.07 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/14/2015 Stove Pipe Top of PVC Casing 22.79 6.22 16.57 32S/13E-30F02 Highway 1 - Middle Paso Robles 1/13/2015 Stove Pipe Top of PVC Casing 22.79 6.75 16.04 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/14/2014 Stove Pipe Top of PVC Casing 22.79 5.83 16.9632S/13E-30F02 Highway 1 - Middle Paso Robles 7/29/2014 Stove Pipe Top of PVC Casing 22.79 5.85 16.94 32S/13E-30F02 Highway 1 - Middle Paso Robles 6/4/2014 Stove Pipe Top of PVC Casing 22.79 5.16 17.63 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/15/2014 Stove Pipe Top of PVC Casing 22.79 6.89 15.90 32S/13E-30F02 Highway 1 - Middle Paso Robles 1/14/2014 Stove Pipe Top of PVC Casing 22.79 6.15 16.64 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/14/2013 Stove Pipe Top of PVC Casing 22.79 5.64 17.1532S/13E-30F02 Highway 1 - Middle Paso Robles 7/9/2013 Stove Pipe Top of PVC Casing 22.79 6.01 16.78 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/10/2013 Stove Pipe Top of PVC Casing 22.79 7.40 15.39

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/13E-30F02 Highway 1 - Middle Paso Robles 1/14/2013 Stove Pipe Top of PVC Casing 22.79 8.15 14.6432S/13E-30F02 Highway 1 - Middle Paso Robles 10/30/2012 Stove Pipe Top of PVC Casing 22.79 7.89 14.9032S/13E-30F02 Highway 1 - Middle Paso Robles 7/24/2012 Stove Pipe Top of PVC Casing 22.79 8.34 14.45 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/18/2012 Stove Pipe Top of PVC Casing 22.79 8.78 14.01 32S/13E-30F02 Highway 1 - Middle Paso Robles 1/12/2012 Stove Pipe Top of PVC Casing 22.79 8.85 13.94 32S/13E-30F02 Highway 1 - Middle Paso Robles 11/21/2011 Stove Pipe Top of PVC Casing 22.79 8.22 14.5732S/13E-30F02 Highway 1 - Middle Paso Robles 7/26/2011 Stove Pipe Top of PVC Casing 22.79 8.70 14.09 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/20/2011 Stove Pipe Top of PVC Casing 22.79 8.93 13.86 32S/13E-30F02 Highway 1 - Middle Paso Robles 1/24/2011 Stove Pipe Top of PVC Casing 22.79 8.80 13.99 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/21/2010 Stove Pipe Top of PVC Casing 22.79 15.77 7.02 32S/13E-30F02 Highway 1 - Middle Paso Robles 7/26/2010 Stove Pipe Top of PVC Casing 22.79 6.95 15.84 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/27/2010 Stove Pipe Top of PVC Casing 22.79 8.22 14.57 32S/13E-30F02 Highway 1 - Middle Paso Robles 1/28/2010 Stove Pipe Top of PVC Casing 22.79 7.27 15.52 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/19/2009 Stove Pipe Top of PVC Casing 22.79 6.00 16.7932S/13E-30F02 Highway 1 - Middle Paso Robles 8/19/2009 Stove Pipe Top of PVC Casing 22.79 5.55 17.24 32S/13E-30F02 Highway 1 - Middle Paso Robles 5/12/2009 Stove Pipe Top of PVC Casing 22.79 6.02 16.77 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/7/2009 Stove Pipe Top of PVC Casing 22.79 8.08 14.71 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/15/2008 Stove Pipe Top of PVC Casing 22.79 5.02 17.7732S/13E-30F02 Highway 1 - Middle Paso Robles 4/15/2008 Stove Pipe Top of PVC Casing 22.79 7.96 14.83 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/18/2007 Stove Pipe Top of PVC Casing 22.79 5.01 17.7832S/13E-30F02 Highway 1 - Middle Paso Robles 4/17/2007 Stove Pipe Top of PVC Casing 22.79 7.93 14.86 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/19/2006 Stove Pipe Top of PVC Casing 22.79 7.51 15.2832S/13E-30F02 Highway 1 - Middle Paso Robles 4/25/2006 Stove Pipe Top of PVC Casing 22.79 10.51 12.2832S/13E-30F02 Highway 1 - Middle Paso Robles 10/7/2005 Stove Pipe Top of PVC Casing 22.79 8.21 14.58 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/28/2005 Stove Pipe Top of PVC Casing 22.79 9.01 13.78 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/27/2004 Stove Pipe Top of PVC Casing 22.79 5.86 16.9332S/13E-30F02 Highway 1 - Middle Paso Robles 4/8/2004 Stove Pipe Top of PVC Casing 22.79 9.96 12.83 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/14/2002 Stove Pipe Top of PVC Casing 22.79 6.06 16.7332S/13E-30F02 Highway 1 - Middle Paso Robles 4/9/2002 Stove Pipe Top of PVC Casing 22.79 9.26 13.53 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/5/2001 Stove Pipe Top of PVC Casing 22.79 8.06 14.73 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/23/2001 Stove Pipe Top of PVC Casing 22.79 10.26 12.53 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/16/2000 Stove Pipe Top of PVC Casing 22.79 8.06 14.7332S/13E-30F02 Highway 1 - Middle Paso Robles 4/24/2000 Stove Pipe Top of PVC Casing 22.79 9.36 13.43 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/29/1999 Stove Pipe Top of PVC Casing 22.79 8.16 14.6332S/13E-30F02 Highway 1 - Middle Paso Robles 4/15/1999 Stove Pipe Top of PVC Casing 22.79 10.06 12.7332S/13E-30F02 Highway 1 - Middle Paso Robles 10/20/1998 Stove Pipe Top of PVC Casing 22.79 9.66 13.1332S/13E-30F02 Highway 1 - Middle Paso Robles 4/23/1998 Stove Pipe Top of PVC Casing 22.79 12.06 10.7332S/13E-30F02 Highway 1 - Middle Paso Robles 10/22/1997 Stove Pipe Top of PVC Casing 22.79 8.06 14.7332S/13E-30F02 Highway 1 - Middle Paso Robles 4/29/1997 Stove Pipe Top of PVC Casing 22.79 9.16 13.63 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/23/1996 Stove Pipe Top of PVC Casing 22.79 8.31 14.4832S/13E-30F02 Highway 1 - Middle Paso Robles 4/29/1996 Stove Pipe Top of PVC Casing 22.79 9.56 13.23 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/11/1995 Stove Pipe Top of PVC Casing 22.79 8.46 14.3332S/13E-30F02 Highway 1 - Middle Paso Robles 4/19/1995 Stove Pipe Top of PVC Casing 22.79 10.31 12.4832S/13E-30F02 Highway 1 - Middle Paso Robles 11/1/1994 Stove Pipe Top of PVC Casing 22.79 6.46 16.33 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/11/1994 Stove Pipe Top of PVC Casing 22.79 8.57 14.22 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/13/1993 Stove Pipe Top of PVC Casing 22.79 7.60 15.19

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/13E-30F02 Highway 1 - Middle Paso Robles 4/8/1993 Stove Pipe Top of PVC Casing 22.79 9.88 12.9132S/13E-30F02 Highway 1 - Middle Paso Robles 11/4/1992 Stove Pipe Top of PVC Casing 22.79 7.06 15.73 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/21/1992 Stove Pipe Top of PVC Casing 22.79 10.91 11.8832S/13E-30F02 Highway 1 - Middle Paso Robles 10/11/1991 Stove Pipe Top of PVC Casing 22.79 6.94 15.8532S/13E-30F02 Highway 1 - Middle Paso Robles 4/19/1991 Stove Pipe Top of PVC Casing 22.79 7.31 15.48 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/11/1990 Stove Pipe Top of PVC Casing 22.79 5.65 17.1432S/13E-30F02 Highway 1 - Middle Paso Robles 4/24/1990 Stove Pipe Top of PVC Casing 22.79 7.21 15.58 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/4/1989 Stove Pipe Top of PVC Casing 22.79 6.65 16.14 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/17/1989 Stove Pipe Top of PVC Casing 22.79 5.86 16.93 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/20/1988 Stove Pipe Top of PVC Casing 22.79 6.36 16.4332S/13E-30F02 Highway 1 - Middle Paso Robles 4/29/1988 Stove Pipe Top of PVC Casing 22.79 7.51 15.28 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/21/1988 Stove Pipe Top of PVC Casing 22.79 7.13 15.66 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/19/1987 Stove Pipe Top of PVC Casing 22.79 6.39 16.4032S/13E-30F02 Highway 1 - Middle Paso Robles 4/13/1987 Stove Pipe Top of PVC Casing 22.79 8.40 14.39 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/31/1986 Stove Pipe Top of PVC Casing 22.79 7.80 14.9932S/13E-30F02 Highway 1 - Middle Paso Robles 4/15/1986 Stove Pipe Top of PVC Casing 22.79 8.39 14.40 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/18/1985 Stove Pipe Top of PVC Casing 22.79 6.96 15.8332S/13E-30F02 Highway 1 - Middle Paso Robles 4/22/1985 Stove Pipe Top of PVC Casing 22.79 8.56 14.23 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/15/1984 Stove Pipe Top of PVC Casing 22.79 8.88 13.9132S/13E-30F02 Highway 1 - Middle Paso Robles 10/28/1983 Stove Pipe Top of PVC Casing 22.79 10.26 12.53 32S/13E-30F02 Highway 1 - Middle Paso Robles 5/6/1982 Stove Pipe Top of PVC Casing 22.79 9.41 13.38 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/19/1981 Stove Pipe Top of PVC Casing 22.79 8.66 14.1332S/13E-30F02 Highway 1 - Middle Paso Robles 4/21/1981 Stove Pipe Top of PVC Casing 22.79 9.63 13.16 32S/13E-30F02 Highway 1 - Middle Paso Robles 10/10/1980 Stove Pipe Top of PVC Casing 22.79 8.61 14.1832S/13E-30F02 Highway 1 - Middle Paso Robles 5/9/1980 Stove Pipe Top of PVC Casing 22.79 8.48 14.31 32S/13E-30F02 Highway 1 - Middle Paso Robles 11/7/1979 Stove Pipe Top of PVC Casing 22.79 9.16 13.63 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/17/1979 Stove Pipe Top of PVC Casing 22.79 9.11 13.68 32S/13E-30F02 Highway 1 - Middle Paso Robles 12/4/1978 Stove Pipe Top of PVC Casing 22.79 9.91 12.88 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/24/1978 Stove Pipe Top of PVC Casing 22.79 10.21 12.5832S/13E-30F02 Highway 1 - Middle Paso Robles 11/7/1977 Stove Pipe Top of PVC Casing 22.79 6.71 16.08 32S/13E-30F02 Highway 1 - Middle Paso Robles 5/17/1977 Stove Pipe Top of PVC Casing 22.79 7.17 15.62 32S/13E-30F02 Highway 1 - Middle Paso Robles 6/9/1976 Stove Pipe Top of PVC Casing 22.79 7.56 15.23 32S/13E-30F02 Highway 1 - Middle Paso Robles 1/14/1976 Stove Pipe Top of PVC Casing 22.79 8.36 14.43 32S/13E-30F02 Highway 1 - Middle Paso Robles 7/7/1975 Stove Pipe Top of PVC Casing 22.79 8.36 14.43 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/1/1975 Stove Pipe Top of PVC Casing 22.79 10.36 12.4332S/13E-30F02 Highway 1 - Middle Paso Robles 6/7/1974 Stove Pipe Top of PVC Casing 22.79 9.42 13.37 32S/13E-30F02 Highway 1 - Middle Paso Robles 9/20/1973 Stove Pipe Top of PVC Casing 22.79 8.51 14.28 32S/13E-30F02 Highway 1 - Middle Paso Robles 6/29/1972 Stove Pipe Top of PVC Casing 22.79 5.36 17.43 32S/13E-30F02 Highway 1 - Middle Paso Robles 2/23/1972 Stove Pipe Top of PVC Casing 22.79 9.36 13.43 32S/13E-30F02 Highway 1 - Middle Paso Robles 11/29/1971 Stove Pipe Top of PVC Casing 22.79 8.01 14.7832S/13E-30F02 Highway 1 - Middle Paso Robles 8/26/1971 Stove Pipe Top of PVC Casing 22.79 8.26 14.53 32S/13E-30F02 Highway 1 - Middle Paso Robles 6/2/1971 Stove Pipe Top of PVC Casing 22.79 8.21 14.58 32S/13E-30F02 Highway 1 - Middle Paso Robles 3/2/1971 Stove Pipe Top of PVC Casing 22.79 9.01 13.78 32S/13E-30F02 Highway 1 - Middle Paso Robles 12/15/1970 Stove Pipe Top of PVC Casing 22.79 8.97 13.8232S/13E-30F02 Highway 1 - Middle Paso Robles 6/3/1970 Stove Pipe Top of PVC Casing 22.79 5.55 17.24 32S/13E-30F02 Highway 1 - Middle Paso Robles 3/27/1970 Stove Pipe Top of PVC Casing 22.79 6.71 16.08

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/13E-30F02 Highway 1 - Middle Paso Robles 1/29/1970 Stove Pipe Top of PVC Casing 22.79 7.64 15.1532S/13E-30F02 Highway 1 - Middle Paso Robles 10/3/1969 Stove Pipe Top of PVC Casing 22.79 5.55 17.24 32S/13E-30F02 Highway 1 - Middle Paso Robles 7/23/1969 Stove Pipe Top of PVC Casing 22.79 5.46 17.33 32S/13E-30F02 Highway 1 - Middle Paso Robles 6/24/1969 Stove Pipe Top of PVC Casing 22.79 6.37 16.42 32S/13E-30F02 Highway 1 - Middle Paso Robles 5/22/1969 Stove Pipe Top of PVC Casing 22.79 6.53 16.26 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/18/1969 Stove Pipe Top of PVC Casing 22.79 7.58 15.21 32S/13E-30F02 Highway 1 - Middle Paso Robles 3/20/1969 Stove Pipe Top of PVC Casing 22.79 8.28 14.51 32S/13E-30F02 Highway 1 - Middle Paso Robles 2/21/1969 Stove Pipe Top of PVC Casing 22.79 7.74 15.05 32S/13E-30F02 Highway 1 - Middle Paso Robles 1/15/1969 Stove Pipe Top of PVC Casing 22.79 5.44 17.35 32S/13E-30F02 Highway 1 - Middle Paso Robles 11/14/1968 Stove Pipe Top of PVC Casing 22.79 4.17 18.6232S/13E-30F02 Highway 1 - Middle Paso Robles 10/17/1968 Stove Pipe Top of PVC Casing 22.79 3.06 19.7332S/13E-30F02 Highway 1 - Middle Paso Robles 9/14/1968 Stove Pipe Top of PVC Casing 22.79 2.18 20.61 32S/13E-30F02 Highway 1 - Middle Paso Robles 8/13/1968 Stove Pipe Top of PVC Casing 22.79 2.96 19.83 32S/13E-30F02 Highway 1 - Middle Paso Robles 7/22/1968 Stove Pipe Top of PVC Casing 22.79 2.99 19.80 32S/13E-30F02 Highway 1 - Middle Paso Robles 6/24/1968 Stove Pipe Top of PVC Casing 22.79 3.19 19.60 32S/13E-30F02 Highway 1 - Middle Paso Robles 5/30/1968 Stove Pipe Top of PVC Casing 22.79 3.42 19.37 32S/13E-30F02 Highway 1 - Middle Paso Robles 4/20/1968 Stove Pipe Top of PVC Casing 22.79 5.12 17.67 32S/13E-30F02 Highway 1 - Middle Paso Robles 3/21/1968 Stove Pipe Top of PVC Casing 22.79 5.66 17.13 32S/13E-30F02 Highway 1 - Middle Paso Robles 2/22/1968 Stove Pipe Top of PVC Casing 22.79 6.51 16.28 32S/13E-30F02 Highway 1 - Middle Paso Robles 1/17/1968 Stove Pipe Top of PVC Casing 22.79 7.04 15.75 32S/13E-30F02 Highway 1 - Middle Paso Robles 12/22/1967 Stove Pipe Top of PVC Casing 22.79 6.37 16.4232S/13E-30F02 Highway 1 - Middle Paso Robles 11/13/1967 Stove Pipe Top of PVC Casing 22.79 4.59 18.2032S/13E-30F02 Highway 1 - Middle Paso Robles 10/9/1967 Stove Pipe Top of PVC Casing 22.79 5.38 17.41 32S/13E-30F02 Highway 1 - Middle Paso Robles 9/5/1967 Stove Pipe Top of PVC Casing 22.79 5.04 17.75 32S/13E-30F02 Highway 1 - Middle Paso Robles 8/8/1967 Stove Pipe Top of PVC Casing 22.79 4.71 18.08 32S/13E-30F02 Highway 1 - Middle Paso Robles 7/12/1967 Stove Pipe Top of PVC Casing 22.79 5.42 17.37 32S/13E-30F02 Highway 1 - Middle Paso Robles 6/1/1967 Stove Pipe Top of PVC Casing 22.79 5.86 16.93 32S/13E-30F02 Highway 1 - Middle Paso Robles 5/2/1967 Stove Pipe Top of PVC Casing 22.79 6.96 15.83 32S/13E-30F03 Highway 1 - Deep Careaga 10/21/2025 Stove Pipe Top of PVC Casing 22.66 10.95 11.71 32S/13E-30F03 Highway 1 - Deep Careaga 7/15/2025 Stove Pipe Top of PVC Casing 22.66 9.69 12.97 32S/13E-30F03 Highway 1 - Deep Careaga 4/14/2025 Stove Pipe Top of PVC Casing 22.66 12.33 10.33 32S/13E-30F03 Highway 1 - Deep Careaga 1/22/2025 Stove Pipe Top of PVC Casing 22.66 12.66 10.0032S/13E-30F03 Highway 1 - Deep Careaga 10/15/2024 Stove Pipe Top of PVC Casing 22.66 12.38 10.28 32S/13E-30F03 Highway 1 - Deep Careaga 7/9/2024 Stove Pipe Top of PVC Casing 22.66 13.13 9.5332S/13E-30F03 Highway 1 - Deep Careaga 4/17/2024 Stove Pipe Top of PVC Casing 22.66 14.91 7.7532S/13E-30F03 Highway 1 - Deep Careaga 1/9/2024 Stove Pipe Top of PVC Casing 22.66 12.71 9.9532S/13E-30F03 Highway 1 - Deep Careaga 10/10/2023 Stove Pipe Top of PVC Casing 22.66 11.99 10.67 32S/13E-30F03 Highway 1 - Deep Careaga 7/4/2023 Stove Pipe Top of PVC Casing 22.66 12.93 9.7332S/13E-30F03 Highway 1 - Deep Careaga 4/11/2023 Stove Pipe Top of PVC Casing 22.66 13.02 9.6432S/13E-30F03 Highway 1 - Deep Careaga 2/7/2023 Stove Pipe Top of PVC Casing 22.66 10.44 12.2232S/13E-30F03 Highway 1 - Deep Careaga 10/3/2022 Stove Pipe Top of PVC Casing 22.66 5.54 17.12 32S/13E-30F03 Highway 1 - Deep Careaga 7/11/2022 Stove Pipe Top of PVC Casing 22.66 4.99 17.67 32S/13E-30F03 Highway 1 - Deep Careaga 4/5/2022 Stove Pipe Top of PVC Casing 22.66 8.07 14.59 32S/13E-30F03 Highway 1 - Deep Careaga 1/4/2022 Stove Pipe Top of PVC Casing 22.66 9.10 13.56 32S/13E-30F03 Highway 1 - Deep Careaga 10/5/2021 Stove Pipe Top of PVC Casing 22.66 6.52 16.14 32S/13E-30F03 Highway 1 - Deep Careaga 7/13/2021 Stove Pipe Top of PVC Casing 22.66 8.05 14.61

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/13E-30F03 Highway 1 - Deep Careaga 4/6/2021 Stove Pipe Top of PVC Casing 22.66 9.07 13.5932S/13E-30F03 Highway 1 - Deep Careaga 1/6/2021 Stove Pipe Top of PVC Casing 22.66 9.12 13.54 32S/13E-30F03 Highway 1 - Deep Careaga 10/7/2020 Stove Pipe Top of PVC Casing 22.66 7.01 15.65 32S/13E-30F03 Highway 1 - Deep Careaga 7/6/2020 Stove Pipe Top of PVC Casing 22.66 9.48 13.18 32S/13E-30F03 Highway 1 - Deep Careaga 4/7/2020 Stove Pipe Top of PVC Casing 22.66 11.97 10.6932S/13E-30F03 Highway 1 - Deep Careaga 1/7/2020 Stove Pipe Top of PVC Casing 22.66 11.03 11.6332S/13E-30F03 Highway 1 - Deep Careaga 10/9/2019 Stove Pipe Top of PVC Casing 22.66 8.76 13.90 32S/13E-30F03 Highway 1 - Deep Careaga 7/9/2019 Stove Pipe Top of PVC Casing 22.66 9.78 12.88 32S/13E-30F03 Highway 1 - Deep Careaga 4/9/2019 Stove Pipe Top of PVC Casing 22.66 10.61 12.0532S/13E-30F03 Highway 1 - Deep Careaga 1/8/2019 Stove Pipe Top of PVC Casing 22.66 8.89 13.77 32S/13E-30F03 Highway 1 - Deep Careaga 10/9/2018 Stove Pipe Top of PVC Casing 22.66 7.68 14.98 32S/13E-30F03 Highway 1 - Deep Careaga 7/10/2018 Stove Pipe Top of PVC Casing 22.66 7.05 15.61 32S/13E-30F03 Highway 1 - Deep Careaga 4/10/2018 Stove Pipe Top of PVC Casing 22.66 11.00 11.6632S/13E-30F03 Highway 1 - Deep Careaga 1/10/2018 Stove Pipe Top of PVC Casing 22.66 10.31 12.3532S/13E-30F03 Highway 1 - Deep Careaga 10/10/2017 Stove Pipe Top of PVC Casing 22.66 8.46 14.2032S/13E-30F03 Highway 1 - Deep Careaga 7/11/2017 Stove Pipe Top of PVC Casing 22.66 9.52 13.14 32S/13E-30F03 Highway 1 - Deep Careaga 4/11/2017 Stove Pipe Top of PVC Casing 22.66 10.80 11.8632S/13E-30F03 Highway 1 - Deep Careaga 1/10/2017 Stove Pipe Top of PVC Casing 22.66 8.91 13.75 32S/13E-30F03 Highway 1 - Deep Careaga 10/12/2016 Stove Pipe Top of PVC Casing 22.66 5.34 17.3232S/13E-30F03 Highway 1 - Deep Careaga 7/19/2016 Stove Pipe Top of PVC Casing 22.66 5.94 16.72 32S/13E-30F03 Highway 1 - Deep Careaga 4/12/2016 Stove Pipe Top of PVC Casing 22.66 8.26 14.40 32S/13E-30F03 Highway 1 - Deep Careaga 1/12/2016 Stove Pipe Top of PVC Casing 22.66 8.32 14.34 32S/13E-30F03 Highway 1 - Deep Careaga 10/13/2015 Stove Pipe Top of PVC Casing 22.66 4.29 18.3732S/13E-30F03 Highway 1 - Deep Careaga 7/14/2015 Stove Pipe Top of PVC Casing 22.66 4.29 18.37 32S/13E-30F03 Highway 1 - Deep Careaga 4/14/2015 Stove Pipe Top of PVC Casing 22.66 5.24 17.42 32S/13E-30F03 Highway 1 - Deep Careaga 1/13/2015 Stove Pipe Top of PVC Casing 22.66 9.03 13.63 32S/13E-30F03 Highway 1 - Deep Careaga 10/14/2014 Stove Pipe Top of PVC Casing 22.66 4.18 18.4832S/13E-30F03 Highway 1 - Deep Careaga 7/29/2014 Stove Pipe Top of PVC Casing 22.66 4.54 18.12 32S/13E-30F03 Highway 1 - Deep Careaga 6/4/2014 Stove Pipe Top of PVC Casing 22.66 0.89 21.77 32S/13E-30F03 Highway 1 - Deep Careaga 5/5/2014 Stove Pipe Top of PVC Casing 22.66 1.82 20.84 32S/13E-30F03 Highway 1 - Deep Careaga 4/15/2014 Stove Pipe Top of PVC Casing 22.66 7.02 15.64 32S/13E-30F03 Highway 1 - Deep Careaga 1/14/2014 Stove Pipe Top of PVC Casing 22.66 7.81 14.85 32S/13E-30F03 Highway 1 - Deep Careaga 10/14/2013 Stove Pipe Top of PVC Casing 22.66 5.86 16.8032S/13E-30F03 Highway 1 - Deep Careaga 7/9/2013 Stove Pipe Top of PVC Casing 22.66 6.55 16.11 32S/13E-30F03 Highway 1 - Deep Careaga 4/10/2013 Stove Pipe Top of PVC Casing 22.66 8.47 14.19 32S/13E-30F03 Highway 1 - Deep Careaga 1/14/2013 Stove Pipe Top of PVC Casing 22.66 10.54 12.1232S/13E-30F03 Highway 1 - Deep Careaga 10/30/2012 Stove Pipe Top of PVC Casing 22.66 8.55 14.1132S/13E-30F03 Highway 1 - Deep Careaga 7/24/2012 Stove Pipe Top of PVC Casing 22.66 8.66 14.00 32S/13E-30F03 Highway 1 - Deep Careaga 4/18/2012 Stove Pipe Top of PVC Casing 22.66 12.73 9.9332S/13E-30F03 Highway 1 - Deep Careaga 1/12/2012 Stove Pipe Top of PVC Casing 22.66 10.79 11.8732S/13E-30F03 Highway 1 - Deep Careaga 11/21/2011 Stove Pipe Top of PVC Casing 22.66 9.92 12.7432S/13E-30F03 Highway 1 - Deep Careaga 7/26/2011 Stove Pipe Top of PVC Casing 22.66 8.94 13.72 32S/13E-30F03 Highway 1 - Deep Careaga 4/20/2011 Stove Pipe Top of PVC Casing 22.66 10.65 12.0132S/13E-30F03 Highway 1 - Deep Careaga 1/24/2011 Stove Pipe Top of PVC Casing 22.66 10.49 12.1732S/13E-30F03 Highway 1 - Deep Careaga 10/21/2010 Stove Pipe Top of PVC Casing 22.66 16.54 6.12 32S/13E-30F03 Highway 1 - Deep Careaga 7/26/2010 Stove Pipe Top of PVC Casing 22.66 5.84 16.82

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/13E-30F03 Highway 1 - Deep Careaga 4/27/2010 Stove Pipe Top of PVC Casing 22.66 8.98 13.6832S/13E-30F03 Highway 1 - Deep Careaga 1/28/2010 Stove Pipe Top of PVC Casing 22.66 9.38 13.28 32S/13E-30F03 Highway 1 - Deep Careaga 10/19/2009 Stove Pipe Top of PVC Casing 22.66 6.18 16.4832S/13E-30F03 Highway 1 - Deep Careaga 8/19/2009 Stove Pipe Top of PVC Casing 22.66 0.13 22.53 32S/13E-30F03 Highway 1 - Deep Careaga 5/12/2009 Stove Pipe Top of PVC Casing 22.66 2.68 19.98 32S/13E-30F03 Highway 1 - Deep Careaga 10/15/2008 Stove Pipe Top of PVC Casing 22.66 -2.16 24.8232S/13E-30F03 Highway 1 - Deep Careaga 4/15/2008 Stove Pipe Top of PVC Casing 22.66 2.50 20.16 32S/13E-30F03 Highway 1 - Deep Careaga 10/18/2007 Stove Pipe Top of PVC Casing 22.66 -1.99 24.6532S/13E-30F03 Highway 1 - Deep Careaga 4/17/2007 Stove Pipe Top of PVC Casing 22.66 -1.39 24.05 32S/13E-30F03 Highway 1 - Deep Careaga 10/19/2006 Stove Pipe Top of PVC Casing 22.66 6.71 15.9532S/13E-30F03 Highway 1 - Deep Careaga 4/26/2006 Stove Pipe Top of PVC Casing 22.66 9.91 12.75 32S/13E-30F03 Highway 1 - Deep Careaga 10/7/2005 Stove Pipe Top of PVC Casing 22.66 5.71 16.95 32S/13E-30F03 Highway 1 - Deep Careaga 4/28/2005 Stove Pipe Top of PVC Casing 22.66 6.96 15.70 32S/13E-30F03 Highway 1 - Deep Careaga 10/27/2004 Stove Pipe Top of PVC Casing 22.66 0.36 22.3032S/13E-30F03 Highway 1 - Deep Careaga 4/8/2004 Stove Pipe Top of PVC Casing 22.66 6.46 16.20 32S/13E-30F03 Highway 1 - Deep Careaga 10/14/2002 Stove Pipe Top of PVC Casing 22.66 4.26 18.40 32S/13E-30F03 Highway 1 - Deep Careaga 4/9/2002 Stove Pipe Top of PVC Casing 22.66 6.86 15.80 32S/13E-30F03 Highway 1 - Deep Careaga 10/5/2001 Stove Pipe Top of PVC Casing 22.66 6.96 15.70 32S/13E-30F03 Highway 1 - Deep Careaga 4/23/2001 Stove Pipe Top of PVC Casing 22.66 12.26 10.4032S/13E-30F03 Highway 1 - Deep Careaga 10/16/2000 Stove Pipe Top of PVC Casing 22.66 8.26 14.4032S/13E-30F03 Highway 1 - Deep Careaga 4/24/2000 Stove Pipe Top of PVC Casing 22.66 4.16 18.50 32S/13E-30F03 Highway 1 - Deep Careaga 10/29/1999 Stove Pipe Top of PVC Casing 22.66 8.86 13.8032S/13E-30F03 Highway 1 - Deep Careaga 4/15/1999 Stove Pipe Top of PVC Casing 22.66 13.27 9.3932S/13E-30F03 Highway 1 - Deep Careaga 10/20/1998 Stove Pipe Top of PVC Casing 22.66 5.66 17.0032S/13E-30F03 Highway 1 - Deep Careaga 4/22/1998 Stove Pipe Top of PVC Casing 22.66 11.61 11.0532S/13E-30F03 Highway 1 - Deep Careaga 10/22/1997 Stove Pipe Top of PVC Casing 22.66 2.50 20.1632S/13E-30F03 Highway 1 - Deep Careaga 4/29/1997 Stove Pipe Top of PVC Casing 22.66 2.50 20.16 32S/13E-30F03 Highway 1 - Deep Careaga 10/23/1996 Stove Pipe Top of PVC Casing 22.66 1.02 21.6432S/13E-30F03 Highway 1 - Deep Careaga 4/29/1996 Stove Pipe Top of PVC Casing 22.66 4.16 18.50 32S/13E-30F03 Highway 1 - Deep Careaga 10/11/1995 Stove Pipe Top of PVC Casing 22.66 -2.64 25.3032S/13E-30F03 Highway 1 - Deep Careaga 4/19/1995 Stove Pipe Top of PVC Casing 22.66 8.76 13.90 32S/13E-30F03 Highway 1 - Deep Careaga 11/1/1994 Stove Pipe Top of PVC Casing 22.66 2.76 19.90 32S/13E-30F03 Highway 1 - Deep Careaga 4/11/1994 Stove Pipe Top of PVC Casing 22.66 6.31 16.35 32S/13E-30F03 Highway 1 - Deep Careaga 10/13/1993 Stove Pipe Top of PVC Casing 22.66 3.08 19.5832S/13E-30F03 Highway 1 - Deep Careaga 4/8/1993 Stove Pipe Top of PVC Casing 22.66 10.11 12.5532S/13E-30F03 Highway 1 - Deep Careaga 11/4/1992 Stove Pipe Top of PVC Casing 22.66 2.06 20.60 32S/13E-30F03 Highway 1 - Deep Careaga 4/21/1992 Stove Pipe Top of PVC Casing 22.66 5.16 17.50 32S/13E-30F03 Highway 1 - Deep Careaga 10/11/1991 Stove Pipe Top of PVC Casing 22.66 0.34 22.3232S/13E-30F03 Highway 1 - Deep Careaga 4/19/1991 Stove Pipe Top of PVC Casing 22.66 3.54 19.12 32S/13E-30F03 Highway 1 - Deep Careaga 10/11/1990 Stove Pipe Top of PVC Casing 22.66 2.24 20.4232S/13E-30F03 Highway 1 - Deep Careaga 4/24/1990 Stove Pipe Top of PVC Casing 22.66 5.33 17.33 32S/13E-30F03 Highway 1 - Deep Careaga 10/4/1989 Stove Pipe Top of PVC Casing 22.66 4.40 18.26 32S/13E-30F03 Highway 1 - Deep Careaga 4/17/1989 Stove Pipe Top of PVC Casing 22.66 3.96 18.70 32S/13E-30F03 Highway 1 - Deep Careaga 10/20/1988 Stove Pipe Top of PVC Casing 22.66 3.33 19.3332S/13E-30F03 Highway 1 - Deep Careaga 4/29/1988 Stove Pipe Top of PVC Casing 22.66 5.66 17.00 32S/13E-30F03 Highway 1 - Deep Careaga 10/19/1987 Stove Pipe Top of PVC Casing 22.66 1.59 21.07

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/13E-30F03 Highway 1 - Deep Careaga 4/13/1987 Stove Pipe Top of PVC Casing 22.66 7.47 15.1932S/13E-30F03 Highway 1 - Deep Careaga 10/31/1986 Stove Pipe Top of PVC Casing 22.66 1.31 21.3532S/13E-30F03 Highway 1 - Deep Careaga 4/15/1986 Stove Pipe Top of PVC Casing 22.66 4.53 18.13 32S/13E-30F03 Highway 1 - Deep Careaga 10/18/1985 Stove Pipe Top of PVC Casing 22.66 5.13 17.5332S/13E-30F03 Highway 1 - Deep Careaga 4/22/1985 Stove Pipe Top of PVC Casing 22.66 8.36 14.30 32S/13E-30F03 Highway 1 - Deep Careaga 10/15/1984 Stove Pipe Top of PVC Casing 22.66 3.48 19.1832S/13E-30F03 Highway 1 - Deep Careaga 10/27/1983 Stove Pipe Top of PVC Casing 22.66 12.88 9.78 32S/13E-30F03 Highway 1 - Deep Careaga 5/6/1982 Stove Pipe Top of PVC Casing 22.66 11.21 11.4532S/13E-30F03 Highway 1 - Deep Careaga 10/19/1981 Stove Pipe Top of PVC Casing 22.66 9.24 13.4232S/13E-30F03 Highway 1 - Deep Careaga 4/21/1981 Stove Pipe Top of PVC Casing 22.66 13.53 9.1332S/13E-30F03 Highway 1 - Deep Careaga 10/10/1980 Stove Pipe Top of PVC Casing 22.66 10.61 12.05 32S/13E-30F03 Highway 1 - Deep Careaga 5/9/1980 Stove Pipe Top of PVC Casing 22.66 13.34 9.3232S/13E-30F03 Highway 1 - Deep Careaga 11/7/1979 Stove Pipe Top of PVC Casing 22.66 12.48 10.1832S/13E-30F03 Highway 1 - Deep Careaga 4/17/1979 Stove Pipe Top of PVC Casing 22.66 15.27 7.3932S/13E-30F03 Highway 1 - Deep Careaga 12/4/1978 Stove Pipe Top of PVC Casing 22.66 14.34 8.3232S/13E-30F03 Highway 1 - Deep Careaga 4/24/1978 Stove Pipe Top of PVC Casing 22.66 15.66 7.00 32S/13E-30F03 Highway 1 - Deep Careaga 11/7/1977 Stove Pipe Top of PVC Casing 22.66 9.61 13.05 32S/13E-30F03 Highway 1 - Deep Careaga 5/17/1977 Stove Pipe Top of PVC Casing 22.66 11.41 11.2532S/13E-30F03 Highway 1 - Deep Careaga 6/9/1976 Stove Pipe Top of PVC Casing 22.66 6.12 16.54 32S/13E-30F03 Highway 1 - Deep Careaga 1/14/1976 Stove Pipe Top of PVC Casing 22.66 13.12 9.5432S/13E-30F03 Highway 1 - Deep Careaga 7/7/1975 Stove Pipe Top of PVC Casing 22.66 11.94 10.7232S/13E-30F03 Highway 1 - Deep Careaga 4/1/1975 Stove Pipe Top of PVC Casing 22.66 14.78 7.8832S/13E-30F03 Highway 1 - Deep Careaga 6/7/1974 Stove Pipe Top of PVC Casing 22.66 14.82 7.8432S/13E-30F03 Highway 1 - Deep Careaga 9/20/1973 Stove Pipe Top of PVC Casing 22.66 13.18 9.4832S/13E-30F03 Highway 1 - Deep Careaga 6/29/1972 Stove Pipe Top of PVC Casing 22.66 10.74 11.9232S/13E-30F03 Highway 1 - Deep Careaga 2/23/1972 Stove Pipe Top of PVC Casing 22.66 14.71 7.9532S/13E-30F03 Highway 1 - Deep Careaga 11/29/1971 Stove Pipe Top of PVC Casing 22.66 13.58 9.08 32S/13E-30F03 Highway 1 - Deep Careaga 8/26/1971 Stove Pipe Top of PVC Casing 22.66 12.16 10.5032S/13E-30F03 Highway 1 - Deep Careaga 6/2/1971 Stove Pipe Top of PVC Casing 22.66 13.02 9.6432S/13E-30F03 Highway 1 - Deep Careaga 3/2/1971 Stove Pipe Top of PVC Casing 22.66 14.60 8.0632S/13E-30F03 Highway 1 - Deep Careaga 12/15/1970 Stove Pipe Top of PVC Casing 22.66 14.57 8.09 32S/13E-30F03 Highway 1 - Deep Careaga 8/4/1970 Stove Pipe Top of PVC Casing 22.66 10.25 12.4132S/13E-30F03 Highway 1 - Deep Careaga 6/3/1970 Stove Pipe Top of PVC Casing 22.66 10.48 12.1832S/13E-30F03 Highway 1 - Deep Careaga 3/27/1970 Stove Pipe Top of PVC Casing 22.66 13.53 9.1332S/13E-30F03 Highway 1 - Deep Careaga 1/29/1970 Stove Pipe Top of PVC Casing 22.66 14.01 8.6532S/13E-30F03 Highway 1 - Deep Careaga 10/3/1969 Stove Pipe Top of PVC Casing 22.66 10.92 11.7432S/13E-30F03 Highway 1 - Deep Careaga 7/23/1969 Stove Pipe Top of PVC Casing 22.66 10.31 12.3532S/13E-30F03 Highway 1 - Deep Careaga 6/24/1969 Stove Pipe Top of PVC Casing 22.66 11.32 11.3432S/13E-30F03 Highway 1 - Deep Careaga 5/22/1969 Stove Pipe Top of PVC Casing 22.66 12.45 10.2132S/13E-30F03 Highway 1 - Deep Careaga 4/18/1969 Stove Pipe Top of PVC Casing 22.66 13.83 8.8332S/13E-30F03 Highway 1 - Deep Careaga 3/20/1969 Stove Pipe Top of PVC Casing 22.66 13.79 8.8732S/13E-30F03 Highway 1 - Deep Careaga 2/21/1969 Stove Pipe Top of PVC Casing 22.66 13.18 9.4832S/13E-30F03 Highway 1 - Deep Careaga 1/15/1969 Stove Pipe Top of PVC Casing 22.66 10.99 11.6732S/13E-30F03 Highway 1 - Deep Careaga 12/12/1968 Stove Pipe Top of PVC Casing 22.66 10.03 12.63 32S/13E-30F03 Highway 1 - Deep Careaga 11/14/1968 Stove Pipe Top of PVC Casing 22.66 8.61 14.05 32S/13E-30F03 Highway 1 - Deep Careaga 10/17/1968 Stove Pipe Top of PVC Casing 22.66 6.81 15.85

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/13E-30F03 Highway 1 - Deep Careaga 9/14/1968 Stove Pipe Top of PVC Casing 22.66 6.16 16.5032S/13E-30F03 Highway 1 - Deep Careaga 8/13/1968 Stove Pipe Top of PVC Casing 22.66 6.71 15.95 32S/13E-30F03 Highway 1 - Deep Careaga 6/24/1968 Stove Pipe Top of PVC Casing 22.66 7.44 15.22 32S/13E-30F03 Highway 1 - Deep Careaga 5/30/1968 Stove Pipe Top of PVC Casing 22.66 8.45 14.21 32S/13E-30F03 Highway 1 - Deep Careaga 4/20/1968 Stove Pipe Top of PVC Casing 22.66 11.01 11.6532S/13E-30F03 Highway 1 - Deep Careaga 3/21/1968 Stove Pipe Top of PVC Casing 22.66 12.11 10.5532S/13E-30F03 Highway 1 - Deep Careaga 2/22/1968 Stove Pipe Top of PVC Casing 22.66 12.69 9.9732S/13E-30F03 Highway 1 - Deep Careaga 1/17/1968 Stove Pipe Top of PVC Casing 22.66 12.75 9.9132S/13E-30F03 Highway 1 - Deep Careaga 12/8/1967 Stove Pipe Top of PVC Casing 22.66 11.79 10.8732S/13E-30F03 Highway 1 - Deep Careaga 11/13/1967 Stove Pipe Top of PVC Casing 22.66 10.43 12.23 32S/13E-30F03 Highway 1 - Deep Careaga 10/9/1967 Stove Pipe Top of PVC Casing 22.66 10.24 12.4232S/13E-30F03 Highway 1 - Deep Careaga 9/5/1967 Stove Pipe Top of PVC Casing 22.66 9.91 12.75 32S/13E-30F03 Highway 1 - Deep Careaga 8/8/1967 Stove Pipe Top of PVC Casing 22.66 10.20 12.4632S/13E-30F03 Highway 1 - Deep Careaga 7/12/1967 Stove Pipe Top of PVC Casing 22.66 10.96 11.7032S/13E-30F03 Highway 1 - Deep Careaga 6/1/1967 Stove Pipe Top of PVC Casing 22.66 12.06 10.6032S/13E-30F03 Highway 1 - Deep Careaga 5/2/1967 Stove Pipe Top of PVC Casing 22.66 13.23 9.43 32S/13E-30N01 Pier Avenue - Shallow Alluvium 10/21/2025 Stove Pipe Top of PVC Casing 15.76 7.85 7.91 32S/13E-30N01 Pier Avenue - Shallow Alluvium 7/15/2025 Stove Pipe Top of PVC Casing 15.76 7.52 8.2432S/13E-30N01 Pier Avenue - Shallow Alluvium 4/14/2025 Stove Pipe Top of PVC Casing 15.76 7.44 8.3232S/13E-30N01 Pier Avenue - Shallow Alluvium 1/22/2025 Stove Pipe Top of PVC Casing 15.76 7.44 8.3232S/13E-30N01 Pier Avenue - Shallow Alluvium 10/15/2024 Stove Pipe Top of PVC Casing 15.76 6.91 8.85 32S/13E-30N01 Pier Avenue - Shallow Alluvium 7/9/2024 Stove Pipe Top of PVC Casing 15.76 7.00 8.7632S/13E-30N01 Pier Avenue - Shallow Alluvium 4/17/2024 Stove Pipe Top of PVC Casing 15.76 7.66 8.1032S/13E-30N01 Pier Avenue - Shallow Alluvium 1/9/2024 Stove Pipe Top of PVC Casing 15.76 7.75 8.0132S/13E-30N01 Pier Avenue - Shallow Alluvium 10/10/2023 Stove Pipe Top of PVC Casing 15.76 7.02 8.74 32S/13E-30N01 Pier Avenue - Shallow Alluvium 7/4/2023 Stove Pipe Top of PVC Casing 15.76 7.00 8.7632S/13E-30N01 Pier Avenue - Shallow Alluvium 4/11/2023 Stove Pipe Top of PVC Casing 15.76 7.51 8.2532S/13E-30N01 Pier Avenue - Shallow Alluvium 2/7/2023 Stove Pipe Top of PVC Casing 15.76 7.53 8.2332S/13E-30N01 Pier Avenue - Shallow Alluvium 10/3/2022 Stove Pipe Top of PVC Casing 15.76 5.95 9.8132S/13E-30N01 Pier Avenue - Shallow Alluvium 7/11/2022 Stove Pipe Top of PVC Casing 15.76 6.20 9.5632S/13E-30N01 Pier Avenue - Shallow Alluvium 4/5/2022 Stove Pipe Top of PVC Casing 15.76 6.93 8.83 32S/13E-30N01 Pier Avenue - Shallow Alluvium 1/4/2022 Stove Pipe Top of PVC Casing 15.76 7.21 8.5532S/13E-30N01 Pier Avenue - Shallow Alluvium 10/5/2021 Stove Pipe Top of PVC Casing 15.76 6.29 9.4732S/13E-30N01 Pier Avenue - Shallow Alluvium 7/13/2021 Stove Pipe Top of PVC Casing 15.76 6.68 9.0832S/13E-30N01 Pier Avenue - Shallow Alluvium 4/6/2021 Stove Pipe Top of PVC Casing 15.76 6.88 8.8832S/13E-30N01 Pier Avenue - Shallow Alluvium 1/6/2021 Stove Pipe Top of PVC Casing 15.76 7.23 8.5332S/13E-30N01 Pier Avenue - Shallow Alluvium 10/7/2020 Stove Pipe Top of PVC Casing 15.76 6.83 8.9332S/13E-30N01 Pier Avenue - Shallow Alluvium 7/6/2020 Stove Pipe Top of PVC Casing 15.76 6.97 8.7932S/13E-30N01 Pier Avenue - Shallow Alluvium 4/7/2020 Stove Pipe Top of PVC Casing 15.76 7.22 8.5432S/13E-30N01 Pier Avenue - Shallow Alluvium 1/7/2020 Stove Pipe Top of PVC Casing 15.76 7.18 8.5832S/13E-30N01 Pier Avenue - Shallow Alluvium 10/9/2019 Stove Pipe Top of PVC Casing 15.76 6.50 9.2632S/13E-30N01 Pier Avenue - Shallow Alluvium 7/9/2019 Stove Pipe Top of PVC Casing 15.76 6.88 8.8832S/13E-30N01 Pier Avenue - Shallow Alluvium 4/9/2019 Stove Pipe Top of PVC Casing 15.76 7.22 8.5432S/13E-30N01 Pier Avenue - Shallow Alluvium 1/8/2019 Stove Pipe Top of PVC Casing 15.76 7.53 8.2332S/13E-30N01 Pier Avenue - Shallow Alluvium 10/9/2018 Stove Pipe Top of PVC Casing 15.76 6.78 8.98 32S/13E-30N01 Pier Avenue - Shallow Alluvium 7/10/2018 Stove Pipe Top of PVC Casing 15.76 6.67 9.09

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/13E-30N01 Pier Avenue - Shallow Alluvium 4/10/2018 Stove Pipe Top of PVC Casing 15.76 7.09 8.6732S/13E-30N01 Pier Avenue - Shallow Alluvium 1/10/2018 Stove Pipe Top of PVC Casing 15.76 7.16 8.6032S/13E-30N01 Pier Avenue - Shallow Alluvium 10/10/2017 Stove Pipe Top of PVC Casing 15.76 6.78 8.98 32S/13E-30N01 Pier Avenue - Shallow Alluvium 7/11/2017 Stove Pipe Top of PVC Casing 15.76 7.13 8.6332S/13E-30N01 Pier Avenue - Shallow Alluvium 4/11/2017 Stove Pipe Top of PVC Casing 15.76 7.43 8.3332S/13E-30N01 Pier Avenue - Shallow Alluvium 1/10/2017 Stove Pipe Top of PVC Casing 15.76 8.24 7.5232S/13E-30N01 Pier Avenue - Shallow Alluvium 10/12/2016 Stove Pipe Top of PVC Casing 15.76 5.92 9.84 32S/13E-30N01 Pier Avenue - Shallow Alluvium 7/19/2016 Stove Pipe Top of PVC Casing 15.76 6.22 9.5432S/13E-30N01 Pier Avenue - Shallow Alluvium 4/12/2016 Stove Pipe Top of PVC Casing 15.76 7.20 8.5632S/13E-30N01 Pier Avenue - Shallow Alluvium 1/12/2016 Stove Pipe Top of PVC Casing 15.76 7.40 8.3632S/13E-30N01 Pier Avenue - Shallow Alluvium 10/13/2015 Stove Pipe Top of PVC Casing 15.76 6.02 9.74 32S/13E-30N01 Pier Avenue - Shallow Alluvium 7/14/2015 Stove Pipe Top of PVC Casing 15.76 6.22 9.5432S/13E-30N01 Pier Avenue - Shallow Alluvium 4/14/2015 Stove Pipe Top of PVC Casing 15.76 6.62 9.1432S/13E-30N01 Pier Avenue - Shallow Alluvium 1/13/2015 Stove Pipe Top of PVC Casing 15.76 7.10 8.6632S/13E-30N01 Pier Avenue - Shallow Alluvium 10/14/2014 Stove Pipe Top of PVC Casing 15.76 6.18 9.58 32S/13E-30N01 Pier Avenue - Shallow Alluvium 7/29/2014 Stove Pipe Top of PVC Casing 15.76 6.25 9.51 32S/13E-30N01 Pier Avenue - Shallow Alluvium 6/4/2014 Stove Pipe Top of PVC Casing 15.76 6.59 9.1732S/13E-30N01 Pier Avenue - Shallow Alluvium 4/15/2014 Stove Pipe Top of PVC Casing 15.76 6.96 8.8032S/13E-30N01 Pier Avenue - Shallow Alluvium 1/14/2014 Stove Pipe Top of PVC Casing 15.76 6.52 9.2432S/13E-30N01 Pier Avenue - Shallow Alluvium 10/14/2013 Stove Pipe Top of PVC Casing 15.76 6.27 9.49 32S/13E-30N01 Pier Avenue - Shallow Alluvium 7/9/2013 Stove Pipe Top of PVC Casing 15.76 6.73 9.0332S/13E-30N01 Pier Avenue - Shallow Alluvium 4/10/2013 Stove Pipe Top of PVC Casing 15.76 7.15 8.6132S/13E-30N01 Pier Avenue - Shallow Alluvium 1/14/2013 Stove Pipe Top of PVC Casing 15.76 7.53 8.2332S/13E-30N01 Pier Avenue - Shallow Alluvium 10/29/2012 Stove Pipe Top of PVC Casing 15.76 8.59 32S/13E-30N01 Pier Avenue - Shallow Alluvium 7/23/2012 Stove Pipe Top of PVC Casing 15.76 8.1732S/13E-30N01 Pier Avenue - Shallow Alluvium 4/18/2012 Stove Pipe Top of PVC Casing 15.76 8.1632S/13E-30N01 Pier Avenue - Shallow Alluvium 1/9/2012 Stove Pipe Top of PVC Casing 15.76 8.3732S/13E-30N01 Pier Avenue - Shallow Alluvium 11/21/2011 Stove Pipe Top of PVC Casing 15.76 7.35 8.41 32S/13E-30N01 Pier Avenue - Shallow Alluvium 7/26/2011 Stove Pipe Top of PVC Casing 15.76 7.12 8.6432S/13E-30N01 Pier Avenue - Shallow Alluvium 4/20/2011 Stove Pipe Top of PVC Casing 15.76 7.54 8.2232S/13E-30N01 Pier Avenue - Shallow Alluvium 1/24/2011 Stove Pipe Top of PVC Casing 15.76 7.95 7.8132S/13E-30N01 Pier Avenue - Shallow Alluvium 10/21/2010 Stove Pipe Top of PVC Casing 15.76 6.14 9.62 32S/13E-30N01 Pier Avenue - Shallow Alluvium 7/27/2010 Stove Pipe Top of PVC Casing 15.76 7.16 8.6032S/13E-30N01 Pier Avenue - Shallow Alluvium 4/27/2010 Stove Pipe Top of PVC Casing 15.76 7.39 8.3732S/13E-30N01 Pier Avenue - Shallow Alluvium 1/26/2010 Stove Pipe Top of PVC Casing 15.76 8.63 7.1332S/13E-30N01 Pier Avenue - Shallow Alluvium 10/20/2009 Stove Pipe Top of PVC Casing 15.76 7.00 8.76 32S/13E-30N01 Pier Avenue - Shallow Alluvium 8/20/2009 Stove Pipe Top of PVC Casing 15.76 6.82 8.9432S/13E-30N01 Pier Avenue - Shallow Alluvium 5/11/2009 Stove Pipe Top of PVC Casing 15.76 7.50 8.2632S/13E-30N01 Pier Avenue - Shallow Alluvium 4/7/2009 Stove Pipe Top of PVC Casing 15.76 7.70 8.0632S/13E-30N01 Pier Avenue - Shallow Alluvium 10/15/2008 Stove Pipe Top of PVC Casing 15.76 6.34 9.42 32S/13E-30N01 Pier Avenue - Shallow Alluvium 4/15/2008 Stove Pipe Top of PVC Casing 15.76 7.33 8.4332S/13E-30N01 Pier Avenue - Shallow Alluvium 10/18/2007 Stove Pipe Top of PVC Casing 15.76 6.33 9.43 32S/13E-30N01 Pier Avenue - Shallow Alluvium 4/25/2006 Stove Pipe Top of PVC Casing 15.76 7.98 7.7832S/13E-30N01 Pier Avenue - Shallow Alluvium 10/7/2005 Stove Pipe Top of PVC Casing 15.76 6.68 9.0832S/13E-30N01 Pier Avenue - Shallow Alluvium 4/29/2005 Stove Pipe Top of PVC Casing 15.76 8.18 7.58 32S/13E-30N01 Pier Avenue - Shallow Alluvium 10/27/2004 Stove Pipe Top of PVC Casing 15.76 7.03 8.73

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/13E-30N01 Pier Avenue - Shallow Alluvium 4/8/2004 Stove Pipe Top of PVC Casing 15.76 7.73 8.0332S/13E-30N01 Pier Avenue - Shallow Alluvium 10/14/2002 Stove Pipe Top of PVC Casing 15.76 6.93 8.83 32S/13E-30N01 Pier Avenue - Shallow Alluvium 4/9/2002 Stove Pipe Top of PVC Casing 15.76 7.83 7.9332S/13E-30N01 Pier Avenue - Shallow Alluvium 10/5/2001 Stove Pipe Top of PVC Casing 15.76 7.73 8.0332S/13E-30N01 Pier Avenue - Shallow Alluvium 4/23/2001 Stove Pipe Top of PVC Casing 15.76 8.53 7.2332S/13E-30N01 Pier Avenue - Shallow Alluvium 10/16/2000 Stove Pipe Top of PVC Casing 15.76 7.63 8.13 32S/13E-30N01 Pier Avenue - Shallow Alluvium 4/24/2000 Stove Pipe Top of PVC Casing 15.76 8.33 7.4332S/13E-30N01 Pier Avenue - Shallow Alluvium 10/29/1999 Stove Pipe Top of PVC Casing 15.76 7.43 8.33 32S/13E-30N01 Pier Avenue - Shallow Alluvium 4/15/1999 Stove Pipe Top of PVC Casing 15.76 8.03 7.7332S/13E-30N01 Pier Avenue - Shallow Alluvium 10/20/1998 Stove Pipe Top of PVC Casing 15.76 7.33 8.43 32S/13E-30N01 Pier Avenue - Shallow Alluvium 4/22/1998 Stove Pipe Top of PVC Casing 15.76 8.63 7.1332S/13E-30N01 Pier Avenue - Shallow Alluvium 10/22/1997 Stove Pipe Top of PVC Casing 15.76 7.51 8.25 32S/13E-30N01 Pier Avenue - Shallow Alluvium 4/29/1997 Stove Pipe Top of PVC Casing 15.76 7.43 8.3332S/13E-30N01 Pier Avenue - Shallow Alluvium 10/23/1996 Stove Pipe Top of PVC Casing 15.76 7.38 8.38 32S/13E-30N01 Pier Avenue - Shallow Alluvium 4/29/1996 Stove Pipe Top of PVC Casing 15.76 7.73 8.0332S/13E-30N01 Pier Avenue - Shallow Alluvium 10/10/1995 Stove Pipe Top of PVC Casing 15.76 7.33 8.43 32S/13E-30N01 Pier Avenue - Shallow Alluvium 4/19/1995 Stove Pipe Top of PVC Casing 15.76 8.33 7.4332S/13E-30N01 Pier Avenue - Shallow Alluvium 11/1/1994 Stove Pipe Top of PVC Casing 15.76 6.93 8.8332S/13E-30N01 Pier Avenue - Shallow Alluvium 4/11/1994 Stove Pipe Top of PVC Casing 15.76 7.73 8.0332S/13E-30N01 Pier Avenue - Shallow Alluvium 10/13/1993 Stove Pipe Top of PVC Casing 15.76 7.20 8.56 32S/13E-30N01 Pier Avenue - Shallow Alluvium 4/8/1993 Stove Pipe Top of PVC Casing 15.76 8.13 7.6332S/13E-30N01 Pier Avenue - Shallow Alluvium 11/4/1992 Stove Pipe Top of PVC Casing 15.76 7.43 8.3332S/13E-30N01 Pier Avenue - Shallow Alluvium 4/21/1992 Stove Pipe Top of PVC Casing 15.76 8.36 7.4032S/13E-30N01 Pier Avenue - Shallow Alluvium 4/11/1991 Stove Pipe Top of PVC Casing 15.76 8.37 7.3932S/13E-30N01 Pier Avenue - Shallow Alluvium 10/11/1990 Stove Pipe Top of PVC Casing 15.76 6.60 9.16 32S/13E-30N01 Pier Avenue - Shallow Alluvium 4/24/1990 Stove Pipe Top of PVC Casing 15.76 7.43 8.3332S/13E-30N01 Pier Avenue - Shallow Alluvium 10/4/1989 Stove Pipe Top of PVC Casing 15.76 6.88 8.8832S/13E-30N01 Pier Avenue - Shallow Alluvium 4/17/1989 Stove Pipe Top of PVC Casing 15.76 7.30 8.4632S/13E-30N01 Pier Avenue - Shallow Alluvium 10/20/1988 Stove Pipe Top of PVC Casing 15.76 6.76 9.00 32S/13E-30N01 Pier Avenue - Shallow Alluvium 4/28/1988 Stove Pipe Top of PVC Casing 15.76 7.40 8.3632S/13E-30N01 Pier Avenue - Shallow Alluvium 4/21/1988 Stove Pipe Top of PVC Casing 15.76 7.76 8.00 32S/13E-30N01 Pier Avenue - Shallow Alluvium 10/19/1987 Stove Pipe Top of PVC Casing 15.76 6.92 8.84 32S/13E-30N01 Pier Avenue - Shallow Alluvium 4/13/1987 Stove Pipe Top of PVC Casing 15.76 7.54 8.2232S/13E-30N01 Pier Avenue - Shallow Alluvium 11/5/1986 Stove Pipe Top of PVC Casing 15.76 7.27 8.4932S/13E-30N01 Pier Avenue - Shallow Alluvium 4/15/1986 Stove Pipe Top of PVC Casing 15.76 8.64 7.1232S/13E-30N01 Pier Avenue - Shallow Alluvium 4/22/1985 Stove Pipe Top of PVC Casing 15.76 8.13 7.6332S/13E-30N01 Pier Avenue - Shallow Alluvium 10/24/1984 Stove Pipe Top of PVC Casing 15.76 7.53 8.23 32S/13E-30N01 Pier Avenue - Shallow Alluvium 10/28/1983 Stove Pipe Top of PVC Casing 15.76 7.53 8.23 32S/13E-30N01 Pier Avenue - Shallow Alluvium 5/6/1982 Stove Pipe Top of PVC Casing 15.76 9.50 6.2632S/13E-30N01 Pier Avenue - Shallow Alluvium 10/20/1981 Stove Pipe Top of PVC Casing 15.76 7.35 8.41 32S/13E-30N01 Pier Avenue - Shallow Alluvium 4/21/1981 Stove Pipe Top of PVC Casing 15.76 8.18 7.5832S/13E-30N01 Pier Avenue - Shallow Alluvium 10/10/1980 Stove Pipe Top of PVC Casing 15.76 7.58 8.18 32S/13E-30N01 Pier Avenue - Shallow Alluvium 5/9/1980 Stove Pipe Top of PVC Casing 15.76 8.56 7.2032S/13E-30N01 Pier Avenue - Shallow Alluvium 11/7/1979 Stove Pipe Top of PVC Casing 15.76 7.64 8.1232S/13E-30N01 Pier Avenue - Shallow Alluvium 4/17/1979 Stove Pipe Top of PVC Casing 15.76 7.90 7.86 32S/13E-30N01 Pier Avenue - Shallow Alluvium 12/4/1978 Stove Pipe Top of PVC Casing 15.76 7.89 7.87

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/13E-30N01 Pier Avenue - Shallow Alluvium 4/24/1978 Stove Pipe Top of PVC Casing 15.76 8.28 7.4832S/13E-30N01 Pier Avenue - Shallow Alluvium 11/7/1977 Stove Pipe Top of PVC Casing 15.76 7.37 8.3932S/13E-30N01 Pier Avenue - Shallow Alluvium 5/17/1977 Stove Pipe Top of PVC Casing 15.76 7.12 8.6432S/13E-30N01 Pier Avenue - Shallow Alluvium 6/7/1976 Stove Pipe Top of PVC Casing 15.76 7.01 8.7532S/13E-30N01 Pier Avenue - Shallow Alluvium 5/21/1976 Stove Pipe Top of PVC Casing 15.76 7.03 8.7332S/13E-30N01 Pier Avenue - Shallow Alluvium 1/14/1976 Stove Pipe Top of PVC Casing 15.76 7.38 8.3832S/13E-30N01 Pier Avenue - Shallow Alluvium 7/7/1975 Stove Pipe Top of PVC Casing 15.76 7.20 8.5632S/13E-30N01 Pier Avenue - Shallow Alluvium 4/1/1975 Stove Pipe Top of PVC Casing 15.76 7.35 8.4132S/13E-30N01 Pier Avenue - Shallow Alluvium 6/7/1974 Stove Pipe Top of PVC Casing 15.76 7.41 8.3532S/13E-30N01 Pier Avenue - Shallow Alluvium 9/20/1973 Stove Pipe Top of PVC Casing 15.76 6.78 8.9832S/13E-30N01 Pier Avenue - Shallow Alluvium 6/29/1972 Stove Pipe Top of PVC Casing 15.76 7.05 8.7132S/13E-30N01 Pier Avenue - Shallow Alluvium 2/29/1972 Stove Pipe Top of PVC Casing 15.76 6.73 9.0332S/13E-30N01 Pier Avenue - Shallow Alluvium 11/29/1971 Stove Pipe Top of PVC Casing 15.76 7.22 8.54 32S/13E-30N01 Pier Avenue - Shallow Alluvium 8/26/1971 Stove Pipe Top of PVC Casing 15.76 7.30 8.4632S/13E-30N01 Pier Avenue - Shallow Alluvium 6/2/1971 Stove Pipe Top of PVC Casing 15.76 7.41 8.3532S/13E-30N01 Pier Avenue - Shallow Alluvium 3/2/1971 Stove Pipe Top of PVC Casing 15.76 8.04 7.72 32S/13E-30N01 Pier Avenue - Shallow Alluvium 12/15/1970 Stove Pipe Top of PVC Casing 15.76 7.80 7.96 32S/13E-30N01 Pier Avenue - Shallow Alluvium 5/22/1969 Stove Pipe Top of PVC Casing 15.76 7.25 8.5132S/13E-30N01 Pier Avenue - Shallow Alluvium 4/18/1969 Stove Pipe Top of PVC Casing 15.76 7.59 8.1732S/13E-30N01 Pier Avenue - Shallow Alluvium 3/20/1969 Stove Pipe Top of PVC Casing 15.76 8.11 7.6532S/13E-30N01 Pier Avenue - Shallow Alluvium 2/21/1969 Stove Pipe Top of PVC Casing 15.76 8.57 7.1932S/13E-30N01 Pier Avenue - Shallow Alluvium 1/5/1969 Stove Pipe Top of PVC Casing 15.76 6.87 8.8932S/13E-30N01 Pier Avenue - Shallow Alluvium 12/12/1968 Stove Pipe Top of PVC Casing 15.76 6.29 9.47 32S/13E-30N01 Pier Avenue - Shallow Alluvium 11/14/1968 Stove Pipe Top of PVC Casing 15.76 6.07 9.69 32S/13E-30N01 Pier Avenue - Shallow Alluvium 10/17/1968 Stove Pipe Top of PVC Casing 15.76 5.72 10.0432S/13E-30N01 Pier Avenue - Shallow Alluvium 9/14/1968 Stove Pipe Top of PVC Casing 15.76 5.65 10.11 32S/13E-30N01 Pier Avenue - Shallow Alluvium 8/13/1968 Stove Pipe Top of PVC Casing 15.76 6.03 9.7332S/13E-30N01 Pier Avenue - Shallow Alluvium 3/21/1968 Stove Pipe Top of PVC Casing 15.76 7.38 8.3832S/13E-30N01 Pier Avenue - Shallow Alluvium 2/22/1968 Stove Pipe Top of PVC Casing 15.76 7.30 8.4632S/13E-30N01 Pier Avenue - Shallow Alluvium 1/17/1968 Stove Pipe Top of PVC Casing 15.76 6.85 8.9132S/13E-30N01 Pier Avenue - Shallow Alluvium 12/8/1967 Stove Pipe Top of PVC Casing 15.76 7.08 8.68 32S/13E-30N01 Pier Avenue - Shallow Alluvium 11/13/1967 Stove Pipe Top of PVC Casing 15.76 6.51 9.25 32S/13E-30N01 Pier Avenue - Shallow Alluvium 10/9/1967 Stove Pipe Top of PVC Casing 15.76 6.23 9.5332S/13E-30N01 Pier Avenue - Shallow Alluvium 9/5/1967 Stove Pipe Top of PVC Casing 15.76 6.35 9.4132S/13E-30N01 Pier Avenue - Shallow Alluvium 8/8/1967 Stove Pipe Top of PVC Casing 15.76 6.49 9.2732S/13E-30N01 Pier Avenue - Shallow Alluvium 7/12/1967 Stove Pipe Top of PVC Casing 15.76 6.51 9.2532S/13E-30N01 Pier Avenue - Shallow Alluvium 6/1/1967 Stove Pipe Top of PVC Casing 15.76 6.78 8.9832S/13E-30N01 Pier Avenue - Shallow Alluvium 5/2/1967 Stove Pipe Top of PVC Casing 15.76 7.13 8.6332S/13E-30N03 Pier Avenue - Middle Paso Robles 10/21/2025 Stove Pipe Top of PVC Casing 15.67 8.70 6.97 32S/13E-30N03 Pier Avenue - Middle Paso Robles 7/15/2025 Stove Pipe Top of PVC Casing 15.67 7.16 8.5132S/13E-30N03 Pier Avenue - Middle Paso Robles 4/14/2025 Stove Pipe Top of PVC Casing 15.67 9.54 6.1332S/13E-30N03 Pier Avenue - Middle Paso Robles 1/22/2025 Stove Pipe Top of PVC Casing 15.67 8.66 7.0132S/13E-30N03 Pier Avenue - Middle Paso Robles 10/15/2024 Stove Pipe Top of PVC Casing 15.67 9.76 5.91 32S/13E-30N03 Pier Avenue - Middle Paso Robles 7/9/2024 Stove Pipe Top of PVC Casing 15.67 8.88 6.7932S/13E-30N03 Pier Avenue - Middle Paso Robles 4/17/2024 Stove Pipe Top of PVC Casing 15.67 9.55 6.12 32S/13E-30N03 Pier Avenue - Middle Paso Robles 1/9/2024 Stove Pipe Top of PVC Casing 15.67 10.17 5.50

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/13E-30N03 Pier Avenue - Middle Paso Robles 10/10/2023 Stove Pipe Top of PVC Casing 15.67 9.40 6.2732S/13E-30N03 Pier Avenue - Middle Paso Robles 7/4/2023 Stove Pipe Top of PVC Casing 15.67 8.77 6.9032S/13E-30N03 Pier Avenue - Middle Paso Robles 4/11/2023 Stove Pipe Top of PVC Casing 15.67 8.96 6.7132S/13E-30N03 Pier Avenue - Middle Paso Robles 2/7/2023 Stove Pipe Top of PVC Casing 15.67 9.14 6.5332S/13E-30N03 Pier Avenue - Middle Paso Robles 10/3/2022 Stove Pipe Top of PVC Casing 15.67 6.22 9.4532S/13E-30N03 Pier Avenue - Middle Paso Robles 7/11/2022 Stove Pipe Top of PVC Casing 15.67 5.77 9.9032S/13E-30N03 Pier Avenue - Middle Paso Robles 4/5/2022 Stove Pipe Top of PVC Casing 15.67 6.18 9.4932S/13E-30N03 Pier Avenue - Middle Paso Robles 1/4/2022 Stove Pipe Top of PVC Casing 15.67 8.29 7.3832S/13E-30N03 Pier Avenue - Middle Paso Robles 10/5/2021 Stove Pipe Top of PVC Casing 15.67 6.78 8.8932S/13E-30N03 Pier Avenue - Middle Paso Robles 7/13/2021 Stove Pipe Top of PVC Casing 15.67 5.64 10.03 32S/13E-30N03 Pier Avenue - Middle Paso Robles 4/6/2021 Stove Pipe Top of PVC Casing 15.67 8.36 7.3132S/13E-30N03 Pier Avenue - Middle Paso Robles 1/6/2021 Stove Pipe Top of PVC Casing 15.67 7.32 8.3532S/13E-30N03 Pier Avenue - Middle Paso Robles 10/7/2020 Stove Pipe Top of PVC Casing 15.67 7.13 8.5432S/13E-30N03 Pier Avenue - Middle Paso Robles 7/6/2020 Stove Pipe Top of PVC Casing 15.67 7.76 7.9132S/13E-30N03 Pier Avenue - Middle Paso Robles 4/7/2020 Stove Pipe Top of PVC Casing 15.67 8.71 6.9632S/13E-30N03 Pier Avenue - Middle Paso Robles 1/7/2020 Stove Pipe Top of PVC Casing 15.67 8.24 7.43 32S/13E-30N03 Pier Avenue - Middle Paso Robles 10/9/2019 Stove Pipe Top of PVC Casing 15.67 7.84 7.8332S/13E-30N03 Pier Avenue - Middle Paso Robles 7/9/2019 Stove Pipe Top of PVC Casing 15.67 7.78 7.8932S/13E-30N03 Pier Avenue - Middle Paso Robles 4/9/2019 Stove Pipe Top of PVC Casing 15.67 7.88 7.7932S/13E-30N03 Pier Avenue - Middle Paso Robles 1/8/2019 Stove Pipe Top of PVC Casing 15.67 8.23 7.4432S/13E-30N03 Pier Avenue - Middle Paso Robles 10/9/2018 Stove Pipe Top of PVC Casing 15.67 7.76 7.9132S/13E-30N03 Pier Avenue - Middle Paso Robles 7/10/2018 Stove Pipe Top of PVC Casing 15.67 7.01 8.6632S/13E-30N03 Pier Avenue - Middle Paso Robles 4/10/2018 Stove Pipe Top of PVC Casing 15.67 8.63 7.0432S/13E-30N03 Pier Avenue - Middle Paso Robles 1/10/2018 Stove Pipe Top of PVC Casing 15.67 8.52 7.1532S/13E-30N03 Pier Avenue - Middle Paso Robles 10/10/2017 Stove Pipe Top of PVC Casing 15.67 7.52 8.15 32S/13E-30N03 Pier Avenue - Middle Paso Robles 7/11/2017 Stove Pipe Top of PVC Casing 15.67 7.29 8.3832S/13E-30N03 Pier Avenue - Middle Paso Robles 4/11/2017 Stove Pipe Top of PVC Casing 15.67 8.58 7.0932S/13E-30N03 Pier Avenue - Middle Paso Robles 1/10/2017 Stove Pipe Top of PVC Casing 15.67 9.02 6.6532S/13E-30N03 Pier Avenue - Middle Paso Robles 10/12/2016 Stove Pipe Top of PVC Casing 15.67 6.00 9.67 32S/13E-30N03 Pier Avenue - Middle Paso Robles 7/19/2016 Stove Pipe Top of PVC Casing 15.67 5.51 10.16 32S/13E-30N03 Pier Avenue - Middle Paso Robles 4/12/2016 Stove Pipe Top of PVC Casing 15.67 6.92 8.75 32S/13E-30N03 Pier Avenue - Middle Paso Robles 1/12/2016 Stove Pipe Top of PVC Casing 15.67 8.15 7.5232S/13E-30N03 Pier Avenue - Middle Paso Robles 10/13/2015 Stove Pipe Top of PVC Casing 15.67 5.65 10.0232S/13E-30N03 Pier Avenue - Middle Paso Robles 7/14/2015 Stove Pipe Top of PVC Casing 15.67 5.25 10.42 32S/13E-30N03 Pier Avenue - Middle Paso Robles 4/14/2015 Stove Pipe Top of PVC Casing 15.67 4.25 11.42 32S/13E-30N03 Pier Avenue - Middle Paso Robles 1/13/2015 Stove Pipe Top of PVC Casing 15.67 6.73 8.9432S/13E-30N03 Pier Avenue - Middle Paso Robles 10/14/2014 Stove Pipe Top of PVC Casing 15.67 5.61 10.0632S/13E-30N03 Pier Avenue - Middle Paso Robles 7/29/2014 Stove Pipe Top of PVC Casing 15.67 5.91 9.7632S/13E-30N03 Pier Avenue - Middle Paso Robles 6/4/2014 Stove Pipe Top of PVC Casing 15.67 4.80 10.87 32S/13E-30N03 Pier Avenue - Middle Paso Robles 4/15/2014 Stove Pipe Top of PVC Casing 15.67 6.82 8.8532S/13E-30N03 Pier Avenue - Middle Paso Robles 1/14/2014 Stove Pipe Top of PVC Casing 15.67 5.87 9.8032S/13E-30N03 Pier Avenue - Middle Paso Robles 10/14/2013 Stove Pipe Top of PVC Casing 15.67 5.41 10.2632S/13E-30N03 Pier Avenue - Middle Paso Robles 7/9/2013 Stove Pipe Top of PVC Casing 15.67 5.77 9.9032S/13E-30N03 Pier Avenue - Middle Paso Robles 4/10/2013 Stove Pipe Top of PVC Casing 15.67 7.87 7.8032S/13E-30N03 Pier Avenue - Middle Paso Robles 1/14/2013 Stove Pipe Top of PVC Casing 15.67 8.42 7.25 32S/13E-30N03 Pier Avenue - Middle Paso Robles 10/29/2012 Stove Pipe Top of PVC Casing 15.67 8.12 7.55

Well Common Name Aquifer Date Surface Completion RP Description RP Elev. (feet NAVD 88) Groundwater Elevation (feet NAVD 88) Depth to Water (feet) Table A-1. NCMA Sentry Wells Water Level Data
32S/13E-30N03 Pier Avenue - Middle Paso Robles 7/23/2012 Stove Pipe Top of PVC Casing 15.67 6.98 8.6932S/13E-30N03 Pier Avenue - Middle Paso Robles 4/18/2012 Stove Pipe Top of PVC Casing 15.67 9.41 6.2632S/13E-30N03 Pier Avenue - Middle Paso Robles 1/11/2012 Stove Pipe Top of PVC Casing 15.67 8.96 6.7132S/13E-30N03 Pier Avenue - Middle Paso Robles 11/21/2011 Stove Pipe Top of PVC Casing 15.67 9.68 5.99 32S/13E-30N03 Pier Avenue - Middle Paso Robles 7/26/2011 Stove Pipe Top of PVC Casing 15.67 8.54 7.1332S/13E-30N03 Pier Avenue - Middle Paso Robles 4/20/2011 Stove Pipe Top of PVC Casing 15.67 9.48 6.1932S/13E-30N03 Pier Avenue - Middle Paso Robles 1/24/2011 Stove Pipe Top of PVC Casing 15.67 9.45 6.2232S/13E-30N03 Pier Avenue - Middle Paso Robles 10/21/2010 Stove Pipe Top of PVC Casing 15.67 5.37 10.3032S/13E-30N03 Pier Avenue - Middle Paso Robles 7/27/2010 Stove Pipe Top of PVC Casing 15.67 6.60 9.0732S/13E-30N03 Pier Avenue - Middle Paso Robles 4/27/2010 Stove Pipe Top of PVC Casing 15.67 8.27 7.4032S/13E-30N03 Pier Avenue - Middle Paso Robles 1/26/2010 Stove Pipe Top of PVC Casing 15.67 7.65 8.0232S/13E-30N03 Pier Avenue - Middle Paso Robles 10/20/2009 Stove Pipe Top of PVC Casing 15.67 15.6732S/13E-30N03 Pier Avenue - Middle Paso Robles 8/20/2009 Stove Pipe Top of PVC Casing 15.67 9.6432S/13E-30N03 Pier Avenue - Middle Paso Robles 5/12/2009 Stove Pipe Top of PVC Casing 15.67 8.4732S/13E-30N03 Pier Avenue - Middle Paso Robles 4/15/2008 Stove Pipe Top of PVC Casing 15.67 7.6432S/13E-30N03 Pier Avenue - Middle Paso Robles 10/18/2007 Stove Pipe Top of PVC Casing 15.67 5.38 10.2932S/13E-30N03 Pier Avenue - Middle Paso Robles 4/17/2007 Stove Pipe Top of PVC Casing 15.67 8.03 7.64 32S/13E-30N03 Pier Avenue - Middle Paso Robles 10/19/2006 Stove Pipe Top of PVC Casing 15.67 8.06 7.61 32S/13E-30N03 Pier Avenue - Middle Paso Robles 4/25/2006 Stove Pipe Top of PVC Casing 15.67 10.28 5.3932S/13E-30N03 Pier Avenue - Middle Paso Robles 10/7/2005 Stove Pipe Top of PVC Casing 15.67 7.38 8.2932S/13E-30N03 Pier Avenue - Middle Paso Robles 4/29/2005 Stove Pipe Top of PVC Casing 15.67 8.11 7.5632S/13E-30N03 Pier Avenue - Middle Paso Robles 10/27/2004 Stove Pipe Top of PVC Casing 15.67 6.83 8.84 32S/13E-30N03 Pier Avenue - Middle Paso Robles 4/8/2004 Stove Pipe Top of PVC Casing 15.67 8.63 7.0432S/13E-30N03 Pier Avenue - Middle Paso Robles 10/8/2003 Stove Pipe Top of PVC Casing 15.67 10.33 5.3432S/13E-30N03 Pier Avenue - Middle Paso Robles 10/14/2002 Stove Pipe Top of PVC Casing 15.67 6.43 9.24 32S/13E-30N03 Pier Avenue - Middle Paso Robles 4/9/2002 Stove Pipe Top of PVC Casing 15.67 8.93 6.7432S/13E-30N03 Pier Avenue - Middle Paso Robles 10/5/2001 Stove Pipe Top of PVC Casing 15.67 8.53 7.1432S/13E-30N03 Pier Avenue - Middle Paso Robles 4/23/2001 Stove Pipe Top of PVC Casing 15.67 10.33 5.3432S/13E-30N03 Pier Avenue - Middle Paso Robles 10/16/2000 Stove Pipe Top of PVC Casing 15.67 8.73 6.94 32S/13E-30N03 Pier Avenue - Middle Paso Robles 4/24/2000 Stove Pipe Top of PVC Casing 15.67 9.43 6.2432S/13E-30N03 Pier Avenue - Middle Paso Robles 10/28/1999 Stove Pipe Top of PVC Casing 15.67 7.73 7.94 32S/13E-30N03 Pier Avenue - Middle Paso Robles 4/15/1999 Stove Pipe Top of PVC Casing 15.67 10.18 5.49 32S/13E-30N03 Pier Avenue - Middle Paso Robles 10/20/1998 Stove Pipe Top of PVC Casing 15.67 10.03 5.64 32S/13E-30N03 Pier Avenue - Middle Paso Robles 4/22/1998 Stove Pipe Top of PVC Casing 15.67 12.33 3.3432S/13E-30N03 Pier Avenue - Middle Paso Robles 10/22/1997 Stove Pipe Top of PVC Casing 15.67 8.60 7.07 32S/13E-30N03 Pier Avenue - Middle Paso Robles 4/29/1997 Stove Pipe Top of PVC Casing 15.67 8.93 6.7432S/13E-30N03 Pier Avenue - Middle Paso Robles 10/23/1996 Stove Pipe Top of PVC Casing 15.67 8.48 7.19 32S/13E-30N03 Pier Avenue - Middle Paso Robles 4/29/1996 Stove Pipe Top of PVC Casing 15.67 9.83 5.8432S/13E-30N03 Pier Avenue - Middle Paso Robles 10/10/1995 Stove Pipe Top of PVC Casing 15.67 8.83 6.84 32S/13E-30N03 Pier Avenue - Middle Paso Robles 4/19/1995 Stove Pipe Top of PVC Casing 15.67 10.43 5.2432S/13E-30N03 Pier Avenue - Middle Paso Robles 11/1/1994 Stove Pipe Top of PVC Casing 15.67 6.33 9.3432S/13E-30N03 Pier Avenue - Middle Paso Robles 4/11/1994 Stove Pipe Top of PVC Casing 15.67 8.65 7.0232S/13E-30N03 Pier Avenue - Middle Paso Robles 10/13/1993 Stove Pipe Top of PVC Casing 15.67 7.55 8.12 32S/13E-30N03 Pier Avenue - Middle Paso Robles 4/8/1993 Stove Pipe Top of PVC Casing 15.67 10.18 5.4932S/13E-30N03 Pier Avenue - Middle Paso Robles 11/4/1992 Stove Pipe Top of PVC Casing 15.67 7.13 8.54 32S/13E-30N03 Pier Avenue - Middle Paso Robles 4/21/1992 Stove Pipe Top of PVC Casing 15.67 9.02 6.65