2024 Annual Supply and Demand Assessment for the
City of Manhattan Beach
Prepared by:
Sandy Nimat, Water Compliance Supervisor
Public Works
05/28/2024
BACKGROUND
The City completed the 2024/2025 FY Supply and Demand Assessment utilizing the Department of Water Resources (DWR) guidance and worksheets, the City's Urban Water Management Plan, and the Electronic Annual Report (EAR) data. The final report did not anticipate a shortage for Fiscal Year 24/25. The City has prepared the Annual Water Supply and Demand Assessment for Fiscal Year 24/25 without drought emergency statewide restrictions.
The City is located on the western edge of Los Angeles County, approximately 22 miles southwest of downtown Los Angeles. The City of El Segundo borders the City to the north, Hawthorne and Redondo Beach to the east, and the cities of Redondo Beach and Hermosa Beach to the south. The City comprises approximately 3.9 square miles of primarily residential land use. Commercial land uses are located along Highland Avenue, Manhattan Beach Boulevard, Sepulveda Boulevard, and Manhattan Village, located southeast of Rosecrans Avenue and Sepulveda Boulevard. Industrial land uses primarily consist of the Northrop Grumman and Raleigh Studios, located northwest of Aviation Boulevard and Marine Avenue. Figure 1.
The City provides water service to a population of approximately 34,668. This service area consists of Individual “water use sectors” that include single-family and multi-family residential, commercial, industrial, and landscape.
Figure 1 City of Manhattan Beach borders.
WATER USAGE DATA
The City of Manhattan Beach currently measures its water use through meter data and billing records.
Additionally, the City conducts an annual water loss audit to identify distribution system water loss.
Water loss can result from pipeline leaks and inaccurate metering due to faulty meters. Water loss estimates are incorporated into the City’s projected water demands.
The City’s water demand projections incorporate water savings from implementing the new Automated Meter Infrastructure (AMI), utilizing leak alerts to warn customers when they have a leak on the property and assisting them in finding those leaks.
WATER SUPPLY AND DEMAND
As for the City’s water reliability, the City’s water supply sources include treated imported water from the Metropolitan Water District of Southern California (MWD), locally pumped groundwater, and recycled water supply from West Basin Municipal Water District (WBMWD). MWD is the regional wholesaler of imported water for most of Southern California, providing water to its member agencies through a regional distribution system. WBMWD is one of MWD’s member agencies that provides imported water to agencies in the South Bay portion of Los Angeles County, including the City. WBMWD is the primary source of water supply for the City. Water from WBMWD is provided to the City at connection WB-04, located at Manhattan Beach Boulevard and Redondo Avenue. The City maintains a metered connection with WBMWD to receive treated imported water. The capacity of this connection is 15 cubic feet per second (cfs). Currently, the City gets imported water from a blended portfolio of State Water Project and Colorado River supplies.
Weather in the City of Manhattan Beach is also a factor in determining the supply and demand as weather can directly impact the City's main source of supply. In March 24, 2023, Governor Newsom issued Executive Order N-5-23, which reduced emergency drought requirements from the statewide Level 2 demand reduction to lesser requirements, but did not immediately terminate California State Water Resources Control Board water conservation emergency regulations. In addition, the executive order allows urban water suppliers to apply stricter water conservation measures. The City follows level 2 of the demand reduction structure of its Water Shortage Contingency Plan (WSCP) which mandates the reduction of water usage at 10-20%.
The Department of Water Resources (DWR) conducted its annual snow survey in April 2024. The April measurement is critical for water agencies as it’s considered the peak snowpack for the season and marks the transition to spring snowmelt into the state’s rivers and reservoirs. This year, the survey reported a record setting snow-pack at a 110 percent of the average of the same location, indicating a significant increase from January of this year. However, despite the replenishment of reservoirs due to winter storms and record snowpack, groundwater basins are experiencing slower recovery.
Consequently, the state has upheld its conservation stance and urges Californians to integrate water conservation as “a way of life,” given the anticipated continuation of fluctuations between wet and dry conditions.
CONCLUSION
For the 2024 reporting year, the assessment findings are consistent with previous years; there is no technical water supply shortage in Manhattan Beach for Fiscal Year 2024-2025. Nonetheless, in alignment with state policy advocating water conservation to become a way of life in California and in anticipation of those stricter regulations to be issued by the state in summer 2024, it is recommended that the City maintains Stage 2 of its established drought restrictions in its WSCP.
The City’s capital improvement projects are underway and continually improve system reliability; however, infrastructure-related constraints on supplying water are not an immediate concern under normal operating conditions since the City relies mainly on the WBMWD water supply.
To improve water supply reliability and reduce the City’s dependence on imported water supply, the City is in the process of utilizing more of its local groundwater supply; this capacity and reliability of that water supply are taken into consideration for the City’s Annual Assessment.
Table 1. Annual Assessment Information
Supplier is a Wholesaler
Supplier is a Retailer
If you are both a wholesaler and retailer, will you be submitting two separate reports or a combined report? Number of Reports Year Covered By This Shortage Report (Required)
Start: July 1, 2022
End: June 30, 2023
Volume Unit for Reported Supply and Demand:
(Must use the same unit throughout) AF
Supplier's Annual Assessment Planning Cycle (Required)
Start Month: July
End Month: June
Data Interval:
Water Supplier's Contact Information (Required)
Water Supplier's Name: Manhattan Beach-City, Water Dept.
Contact Name: Sandy Nimat
Contact Title: Water Compliance Supervisor
Street Address: 3621 Bell Ave
ZIP Code: 90266
Phone Number: 310-802-5338
Email Address: [email protected]
Report Preparer's Contact Information
(if different from above)
Preparer's Organization Name: City of Manhattan Beach
Preparer's Contact Name: Christina Lopez
Phone Number: (310) 802-5324
Email Address: [email protected]
Supplier's Water Shortage Contingency Plan
WSCP Title Manhattan Beach Water Shortage Contingency Plan (amended 6-21-22) WSCP Adoption Date 11/2/2021
Other Annual Assessment Related Activities
Activity Timeline/ Outcomes / Links / Notes
Annual Assessment/ Shortage Report Title: Optional
Annual Assessment / Shortage Report Approval Date: MM/DD/YYYY Other Annual Assessment Related Activities: Optional
(Add rows as needed)
Type of Supplier (Required to check one or two)
= From prior tables
= Auto calculated
Use Type Start Year: 2022 Volumetric Unit Used2: AF Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Total by Water Demand Type
Single Family 332.57 199.31 314.52 191.87 305.18 182.51 255.97 155.51 215.25 156.6 233.87 184.52 2727.68 Multi-Family 24.55 30.51 23.25 30.92 25.8 31.79 22.67 26.67 21.83 26.48 23.63 29.77 317.87 Commercial 67.68 33.31 65.24 32.57 67.77 33.07 60.56 26.84 65 26.66 67.85 29.93 576.48 Industrial 44.5 0.0 43.08 0.0 41.27 0.0 32.48 0.0 32.49 0.0 37.11 0.0 230.93 Landscape 27.76 10.5 23.7 5.56 20.01 5.55 11.26 3.59 9 4.19 13.52 5.83 140.47 0 0
0 0
0 497.06 273.63 469.79 260.92 460.03 252.92 382.94 212.61 343.57 213.93 375.98 250.05 3993.43 All Demands 65.51 63.51 46.86 21.05 35.89 38.19 271.01
0 0
0 0
65.51 0 63.51 0 46.86 0 21.05 0 35.89 0 38.19 0 271.01
Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Total
497 274 470 261 460 253 383 213 344 214 376 250 3,993
552 304 510 292 491 258 403 245 379 243 422 274 4,374
552 320 553 320 522 285 483 264 408 265 487 299 4,758
477 303 558 326 566 276 391 261 406 247 459 296 4,567
Three years ago total demand
Four years ago total demand
Optional (for comparison purposes)
Last year's total demand
Two years ago total demand
Table 2: Water Demands1
Projected Water Demands - Volume3
Total by Month (Non-Potable)
1Projections are based on best available data at time of submitting the report and actual demand volumes could be different due to many factors. 2Units of measure (AF, CCF, MG) must remain consistent. 3When opting to provide other than monthly volumes (bi-monthly, quarterly, or annual), please see directions on entering data for Projected Water Demand in the Table Instructions.
Notes: List considered factors impacting demands
Total by Month (Potable)
Additional
Description
(as needed)
Level of
Treatment
for Non-
Potable
Supplies
Drop-down
list
Drop-down list
May select each use multiple times
These are the only Use Types that will
be recognized by the WUEdata online
submittal tool
(Add additional rows as needed)
Demands Served by Potable Supplies
Demands Served by Non-Potable Supplies
= From prior tables
= Auto calculated
Water Supply Start Year: 2022 Volumetric Unit Used2: AF Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun
Total by
Water
Supply Type
Purchased/Imported Water 395.5 387.7 297.3 302.3 343.5 334.8 285.4 233.3 260.6 286.6 308.8 342.8 3778.6 Groundwater (not desal.) 14.21 57.16 75.65 79.13 1.27 4.75 15.14 58.17 38.13 40.67 59.29 45.89 489.46 0 0
0 0
0 0
0 0
409.71 444.86 372.95 381.43 344.77 339.55 300.54 291.47 298.73 327.27 368.09 388.69 4268.06 0 Recycled Water 65.51 0 63.51 0 46.86 0 21.05 0 35.89 0 38.19 0 271.01 0 0
0 0
65.51 0 63.51 0 46.86 0 21.05 0 35.89 0 38.19 0 271.01 0 Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Total
0 Potable Supplies
Non-Potable Supplies
eAR Reported Total Water Supplies
Optional (for comparison purposes)
1Projections are based on best available data at time of submitting the report and actual supply volumes could be different due to many factors. 2Units of measure (AF, CCF, MG) must remain consistent. 3When opting to provide other than monthly volumes (bi-monthly, quarterly, or annual), please see directions on entering data for Projected Water Supplies in the Table Instructions.
Notes: List hydrological and regulatory conditions, infrastructure capabilities, and plausible constraints which may impact the water supplies Total by Month (Potable)
Total by Month (Non-Potable)
Table 3: Water Supplies1
Projected Water Supplies - Volume3
Water
Quality
Drop-down
List
Total Right
or Safe
Yield*
(optional)
Additional
Detail on
Water Supply
Drop-down List
May use each category multiple
times.These are the only water
supply categories that will be
recognized by the WUEdata online
submittal tool
(Add additional rows as needed)
= Auto calculated
= For manual input
Table 4(P): Potable Water Shortage Assessment1
Start Year: 2022 Volumetric Unit Used2: AF
Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun3 Total
Anticipated Unconstrained Demand 497.1 273.6 469.8 260.9 460.0 252.9 382.9 212.6 343.6 213.9 376.0 250.1 3993.43 Anticipated Total Water Supply 409.7 444.9 373.0 381.4 344.8 339.6 300.5 291.5 298.7 327.3 368.1 388.7 4268.06 Surplus/Shortage w/o WSCP Action -87.4 171.2 -96.8 120.5 -115.3 86.6 -82.4 78.9 -44.8 113.3 -7.9 138.6 274.6 % Surplus/Shortage w/o WSCP Action -18% 63% -21% 46% -25% 34% -22% 37% -13% 53% -2% 55% 7% State Standard Shortage Level 2 0 3 0 3 0 3 0 2 0 1 0 0 Benefit from WSCP: Supply Augmentation 0.0 <------
Benefit from WSCP: Demand Reduction 74.6 41.0 70.5 39.1 69.0 37.9 57.4 31.9 51.5 32.1 56.4 37.5 599.0 <------ Revised Surplus/Shortage with WSCP -12.8 212.3 -26.4 159.6 -46.3 124.6 -25.0 110.8 6.7 145.4 48.5 176.1 873.6 % Revised Surplus/Shortage with WSCP -3% 78% -6% 61% -10% 49% -7% 52% 2% 68% 13% 70% 22% = Auto calculated
= For manual input
Table 4(NP): Non-Potable Water Shortage Assessment1
Start Year: 2022 Volumetric Unit Used2: AF
Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun3 Total
Anticipated Unconstrained Demand: Non-Potable 65.5 0.0 63.5 0.0 46.9 0.0 21.1 0.0 35.9 0.0 38.2 0.0 271.01 Anticipated Total Water Supply: Non-Potable 65.5 0.0 63.5 0.0 46.9 0.0 21.1 0.0 35.9 0.0 38.2 0.0 271.0 Surplus/Shortage w/o WSCP Action: Non-Potable 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 % Surplus/Shortage w/o WSCP Action: Non-Potable 0% 0% 0% 0% 0% 0% 0% Benefit from WSCP: Supply Augmentation 0.0 <------
Benefit from WSCP: Demand Reduction 0.0 <------
Revised Surplus/Shortage with WSCP 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 % Revised Surplus/Shortage with WSCP 0% 0% 0% 0% 0% 0% 0% This row would allow Supplier to include a supply
augmentation action that may ONLY trigger with a particular 'shortage level' selected
1Assessments are based on best available data at time of submitting the report and actual volumes could be different due to many factors. 2Units of measure (AF, CCF, MG) must remain consistent. 3When optional monthly volumes aren't provided, verify Tables 2 and 3 use the same columns for data entry and are reflected properly in Table 4 and make sure to use those same columns to enter the benefits from Planned WSCP Actions. Please see directions on the shortage balancing exercise in the Table Instructions. If a shortage is projected, the supplier is highly recommended to perform a monthly analysis to more accurately identify the time of shortage. 4If you enter any WSCP Benefits, then you must enter the corresponding planned Actions into Table 5. = From prior tables
Planned WSCP Actions4
1Assessments are based on best available data at time of submitting the report and actual volumes could be different due to many factors. 2Units of measure (AF, CCF, MG) must remain consistent. 3When optional monthly volumes aren't provided, verify Tables 2 and 3 use the same columns for data entry and are reflected properly in Table 4 and make sure to use those same columns to enter the benefits from Planned WSCP Actions. Please see directions on the shortage balancing exercise in the Table Instructions. If a shortage is projected, the supplier is highly recommended to perform a monthly analysis to more accurately identify the time of shortage. 4If you enter any WSCP Benefits, then you must enter the corresponding planned Actions into Table 5.
This row would allow Supplier to represent the likely
reduction in water use expected by the 'shortage reponse' that is implemented (e.g. limited outdoor irrigation would This row would allow Supplier to include a supply
augmentation action that may ONLY trigger with a particular 'shortage level' selected
This row would allow Supplier to represent the likely
reduction in water use expected by the 'shortage reponse' that is implemented (e.g. limited outdoor irrigation would = From prior tables
Planned WSCP Actions4
July 1, 2022 to June 30, 2023
Enter Amount
(Drop-down
List)
Select % or
Volume Unit
Start Month End Month
0 (No Shortage) Landscape - Limit landscape irrigation to specific days Yes July June 0 (No Shortage) Landscape - Limit landscape irrigation to specific days Yes July June
NOTES:
Notes Section to be used only
for clarifying details, and not
for listing specific actions.
Actions must be entred into
table rows above.
1If you plan Supply Augmentation Actions then you must enter WSCP Benefits from Supply Augmentation Actions into Table 4. If you plan Demand Reduction Actions then you must enter WSCP Benefits from Demand Reduction Actions into Table 4. 2If an Action is planned to be implemented in multiple non-contiguous periods of the year, please make separate entries on multiple rows for the same action spanning the different implementation periods.
Table 5: Planned Water Shortage Response Actions
Add additional rows as needed
How much is action going to
reduce the shortage gap?
(Optional)
When is shortage response
action anticipated to be
implemented2?Is action
already being
implemented?
(Y/N)
ACTIONS1: Demand Reduction, Supply
Augmentation, and Other Actions.
(Drop-down List)
These are the only categories that will be
accepted by the WUEdata online submittal
tool. Select those that apply.
Anticipated Shortage
Level
Drop-down List of
State Standard Levels (1 -
6) and Level 0 (No
Shortage)