2023 Annual
Drinking Water
Quality Report
(Consumer Confidence Report)
City of Rialto, California
Este informe contiene información muy importante
acerca del Agua Potable. Tradúzcalo o hable con
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CI TY COUNCI L AND ELECTE D OFFICIALS
Deborah Robertson, Mayor
Andy Carrizales, Mayor Pro Tem
Rafael Trujillo, Councilmember
Ed Scott, Councilmember
Joe Baca Sr., Councilmember
Edward Carrillo, City Treasurer
Barbara McGee, City Clerk
City Council meetings are generally
held on the 2nd and 4th Tuesday of
every month at 6:30 pm. Council
Chambers are located at 150 S. Palm
Ave., Rialto, CA 92376
UTILITIE S COMMISSION
Barbara Rickman, Chair
June Hayes, Vice-Chair
Kevin Kobbe, Commissioner
Richard Chitwood, Commissioner
James Shields, Commissioner
CITY EXECUTIVE STAFF
G. Michael Milhiser, Interim City Manager
Tanya Williams, Assistant City Manager
437 N. Riverside Ave
Rialto, CA 92376
(909) 820-0400
Operated by
PRSRT STD
ECRWSS
U.S. POSTAGE
PAID
SAN BERNARDINO, CA
PERMIT NO. 1506
Annual Drinking Water Report
The purpose of this report is to provide information about the quality of the water delivered to customers this past year of 2023. This report is mandated by the United States Environmental Protection Agency (USEPA) and we believe it is your right to know where your water comes from and what it cont ains. We are happy to report that we have consistently delivered water that has met or exceeded the standards set by State and Federal Law. More information about cont aminants and potential health effects can be obtained by calling the USEPA’s Safe Drinking Water Hotline 1(800) 426-4791. For information regarding this Consumer Confidence Report please conta ct David Terry, Project Manager —Veolia. (909) 820-0400.
About Rialto Water Services
The City of Rialto and Rialto Utility Authority (RUA), in partnership with Rialto Water Services (RWS) formed a public- private partnership to execute a 30 year water and wastewater concession. RWS is a partnership between Table Rock Capital and the Union Labor Life Insurance Company (Ullico). RWS contracts with Veolia North America to operate the water and wastewater systems.
Under the Concession Agreement, the City retains full ownership of the water and wastewater systems, retains all water rights and supply, and possesses the rate-setting authority associated with the facilities. RWS provides financial backing, oversight and concession services while Veolia delivers all water and wastewater services, including billing and customer service, and oversees a $41 million capital improvement program to upgrade aging facilities.
OUR MISSION:
Rialto Water Services, operated by Veolia, is
committed to the long-term performance,
safety, customer and community
satisfaction, and lasting cost and energy
efficiencies of Rialto’s water and wastewater
systems, on behalf of the City’s residents.
Customer Service: (909) 820-2546
Emergency After Hours: (909) 820-0400
On the Web: www.rialtowater.com
EPA Safe Drinking Water Hotline: (800) 426-4791
FACTS ABOUT OUR WATER SYSTEM
In 2023, 74% of our total potable drinking water was
sourced from our ground water basins, 16% from the
Baseline Feeder (BLF) and 10% was surface water.
Number of Water Service Connections = 12,080
Miles of Water Main = 186.5
Number of Producing Wells = 7
Total Reservoir Capacity = 28 million gallons
Maximum Daily Production = 16.054 million gallons
Minimum Daily Production = 1.458 million gallons
Average Daily Production = 8.749 million gallons
Total Annual Production = 3.978 billion gallons
What is surface water?
It is any water that travels or is stored on top of the ground.
This would be the water that is in rivers, lakes, streams, oceans--even though we can’t drink salt water. Sometimes surface water sinks into the ground and becomes ground
water. Surface water is treated before it becomes drinking water.
What is ground water?
Any water that is under ground is ground water. In the
water cycle, some of the precipitation sinks into the
ground and goes into watersheds, aquifers and springs.
Ground water flows through layers of sand, clay, rock, and gravel which cleans the water. Ground water stays cleaner than water on the surface and does not need as much
treatment as surface water.
Perchlorate Information
Rialto has a zero tolerance policy regarding water that contains detectable levels of perchlorate.
We currently have wellhead treatment on two of our
wells for the removal of perchlorate. This wellhead
treatment removes the perchlorate to a non-detection
level. The other wells affected by perchlorate
contamination have been out of service and have not
been used since the detection occurred. These
responses, especially the installation of ion exchange
water treatment systems, have produced a measure of
success that has allowed the City to reliably deliver
potable water to all of its customers.
The City of Rialto urges all of its residents to continue conserving water and to look for new ways to reduce
the demand in our system. The City of Rialto continues
to work with those responsible for the contamination
to remediate perchlorate contamination in the water
supply.
Contaminants That May be Present in
Source Water:
Microbial contaminants, such as viruses and bacteria that may come from sewage treatment plants, septic systems,
agricultural livestock operations, and wildlife.
Inorganic contaminants, such as salts and metals, that can be naturally-occurring or result from urban stormwater runoff, industrial or domestic wastewater discharges, oil and gas production, mining, or farming.
Pesticides and herbicides, which may come from a variety of sources such as agriculture, urban stormwater runoff and residential uses.
Organic chemical contaminants, including synthetic and
volatile organic chemicals, which are byproducts of
industrial processes and petroleum production, and can, also, come from gas stations, urban stormwater runoff,
and septic systems.
Radioactive contaminants can naturally occur or be the
result of oil and gas production and mining activities.
Contaminants Expected in Drinking
Water
Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some
contaminants. The presence of contaminants does not
necessarily indicate that water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the U.S. EPS’s Safe Drinking Water Hotline (1-800-426-4791).
People Most Vulnerable To
Contaminants
Some people may be more vulnerable to contaminants in
drinking water than the general population. Immune -
compromised persons such as persons with cancer
undergoing chemotherapy, persons who have undergone
organ transplants, people with HIV/AIDS or other immune disorders, some elderly, and infants can be particularly at risk from infections. These people should seek advice about
drinking water from their health care providers. U.S.
EPA/Centers for Disease Control (CDC) guidelines on
appropriate means to lessen the risk of infection by
Cryptosporidium and other microbial contaminants are
available from the Safe Drinking Water Hotline (1 -800-426- 4791).
Contaminant Information
If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children.
Lead in drinking water is primarily from materials and
components associated with service lines and home plumbing.
The City of Rialto is responsible for providing high quality drinking water, but cannot control the variety of materials used in plumbing components. When your water has been sitting for several hours, you c an minimize the potential for lead exposure by flushing your tap for 30 seconds to 2 minutes before using water for drinking or cooking. If you do so, you may wish to collect the flushed water and reuse it for another beneficial purpose, such as watering p lants. If you are concerned about lead in your water, you may wish to have your water tested. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline or at
hhtp://www.epa.gov/lead.
CITY OF RIALTO WATER QUALITY RESULTS FOR 2023
The State allows us to monitor for some contaminants less than once per year because the concentrations of these contaminants do not change frequently.
Some of our data, though representative, are more than one year old.
PRIMARY STANDARDS - MANDATORY HEALTH -RELATED STANDARDS
Parameter
Sample Date
Units
MCL
PHG
(MCLG)
Range
Average
Water Source
Major Sources in Drinking Water
City
of
Rialto
West
Valley
Water
District
(WVWD)
San
Bernardino
Valley
Municipal
Water
District (BLF)
City of San
Bernardino
Encanto
via BLF
MICROBIOLOGICAL CONTAMINANTS
Total Coliform
Bacteria
(Total Coliform
Rule)
2023
Present/
Absent
(P/A)
Presence
of
Coliform
Bacteria
in 5% of
Monthly
Samples
(0) 0-6 1 1 0 N/A Naturally present in the environment
Fecal Coliform
and E. Coli
(Total Coliform
Rule)
2023
Present/
Absent
(P/A)
Presence
of Total
Coliform
or E. Coli
in a
repeat
sample
(0) 0 0 0 0 N/A Human and animal feces
RADIOACTIVE CONTAMINANTS
Gross Alpha
2023 (pCi/L) 15 (0)
Range 1.68-4.06 1.18 3.09
N/A Erosion of natural deposits
Average 2.78 1.18 3.09
Uranium
2017 (pCi/L) 20 0.43 Range 1.45-4.56 NR 1.8-3.2
N/A Erosion of natural deposits
Average 2.46 17 2.5
Combined
Radium
226/228
2017
(pCi/L) 5 (0)
Range ND-0.145 0.60-1.8 NR
N/A Erosion of natural deposits
Average 0.072 1.3 2.4
INORGANIC CONTAMINANTS
Arsenic
2023 µg/L 10 0.004 Range ND-9.7 ND ND
N/A
Erosion of natural deposits; runoff from
orchards; glass and electronics production
wastes Average 6.7 ND ND
Barium
2023 mg/L 1 2 Range 0.013-
0.053 0.015 0.057
N/A Discharges of oil drilling wastes and from metal
refineries; erosion of natural deposits
Average 0.027 0.015 0.057
Fluoride
2023 mg/L 2 1
Range 0.20-0.26 0.33 0.34
N/A
Erosion of natural deposits; water additive that
promotes strong teeth; discharge from fertilizer
and aluminum factories Average 0.23 0.33 0.34
Hexavalent
Chromium
2013
µg/L N/A 0.02
Range * ND ND
N/A
Discharge from electroplating factories, leather
tanneries, wood preservation, chemical synthesis,
refractory production, and textile manufacturing
facilities; erosion of natural deposits. Average * ND ND Chromium
(Total)
2023
µg/L 50 (100)
Range ND-3.0
ND 1.3 N/A
Discharge from electroplating factories, leather
tanneries, wood preservation, chemical synthesis,
refractory production, and textile manufacturing
facilities; erosion of natural deposits. Average 1.05
Nitrate (as N)
2023 mg/L 10 10
Range 1.4-6.0 0.5 3.8
N/A
Runoff and leaching from fertilizer use; leaching
from septic tanks and sewage; erosion of natural
deposits. Average 3.03 0.5 3.8
Perchlorate
2023 µg/L 6 1
Range ND ND ND
N/A
Perchlorate is an organic chemical used in solid rocket propellant, fireworks, explosives, flares, matches, and a variety of industries. It usually gets into drinking
water as a result of environmental contamination
from historic aerospace or other industrial operations
that used or use, store, or dispose of perchlorate and
its salts.
Average ND ND ND
Selenium
2023 mg/L 50 30
Range ND ND ND
N/A
Discharge from petroleum, glass, and metal
refineries; erosion of natural deposits; discharge
from mines and chemical
manufacturers; runoff from livestock lots (feed
additive) Average ND ND ND
SYNTHETIC ORGANIC CONTAMINANTS INCLUDING PESTICIDES AND HERBICIDES 1,2,3-
Trichloropropane
(TCP)
2023
µg/L 0.005 0.0007
Range ND
ND ND N/A Discharge from metal degreasing sites and other factories Average ND
VOLATILE ORGANIC CONTAMINANTS
Tetrachloroethylene
(PCE)
2021
µg/L 5 0.06 Range * * 0.69-0.82
N/A Discharge from factories, dry cleaners, and auto
shops (metal degreaser) Average * * 0.73
Trichloroethylene
(TCE)
2013
µg/L 5 1.7
Range ND-0.72 ND ND
N/A Discharge from metal degreasing sites and other
factories
Average .36 ND ND
Perfluorooctane
sulfonic Acid
(PFOS)
2023
ng/L 6.5 N/A
Range ND * *
N/A
Perfluorooctanesulfonic acid exposures resulted
in immune suppression and cancer in laboratory
animals. Average ND * *
Perfluorooct-
anoic Acid
(PFOA)
2023**
ng/L 5.1 N/A
Range ND-6.1 * *
N/A
Perfluorooctanoic acid exposures resulted in
increased liver weight and cancer in laboratory
animals. Average 2.85** * *
INORGANIC CONTAMINANTS
Aluminum
2023 µg/L 200 0.6
Range ND-83 61 80
N/A
Erosion of natural deposits; residual
from some surface water treatment
processes Average 28.57 61 80
Chloride
2023 mg/L 500 N/A
Range 3.7-10 1.5-56 9.4-18
N/A Run off/leaching from natural
deposits; seawater influence Average 6.73 22.5 12
Foaming Agents
(MBAS)
2023
µg/L 500 N/A
Range ND ND ND
Municipal and industrial waste
discharges Average ND ND ND
Manganese
2023 mg/L 50 N/A Range ND ND ND
N/A Leaching from natural deposits
Average ND ND ND
Odor Threshold
2023 TON 3 N/A Range ND ND ND N/A Naturally-occurring organic materials Average ND ND ND Specific
Conductance
2023
µS/cm 1,600 N/A Range 300-500 330-520 480-540 N/A Substances that form ions when in water; seawater influence Average 382 434 520
Sulfate
2023 mg/L 500 N/A Range 17-51 22-43 36-53 N/A Run off/leaching from natural deposits; industrial wastes Average 25 33 48
Total Dissolved
Solids (TDS)
2023
mg/L 1,000 N/A Range 160-370 160-200 275-345 N/A Run off/leaching from natural deposits Average 223 180 318
Turbidity
2023 Units 5 N/A Range ND-0.5 ND ND N/A Soil runoff
Average 0.07 ND ND
UNREGULATED Contaminants with no MCLs HEALTH EFFECTS
Boron
2013 mg/L N/A NL=1 Range * 0-0.082% * N/A
The babies of some pregnant women
who drink water containing boron in
excess of the notification level may have
an increased risk of developmental
effects, based on studies in laboratory
animals Average * 0.028 *
Vanadium
2013 ug/L N/A NL=50
Range * ND-6.0 3.8-4.4
N/A
The babies of some pregnant
women who drink water containing
vanadium in excess of the
notification level may have an
increased risk of developmental
effects, based on studies in
laboratory animals
Average * 4.3 4.1
SECONDARY STANDARDS - AESTHETIC STANDARDS
Parameter
Sample Date
Units
MCL
PHG
(MCLG)
Range
Average
Water Source
Major Sources in Drinking Water
City of
Rialto
West Valley Water
District (WVWD)
San Bernardino
Valley Municipal
Water
District (BLF)
City of San
Bernardino
Encanto via BLF
OTHER P A R A M E T E R S
Alkalinity
2023 mg/L N/A N/A Range 150-220 97-200 170-200
N/A Naturally-occurring.
Average 182 148 190
Bicarbonate
2023 mg/L N/A N/A Range 150-220 * *
N/A Biochemical role in PH buffering.
Average 182 * *
Calcium
2023 mg/L N/A N/A Range 41-70 31-78 60-78
N/A Erosion of salt deposits in soil and
rock. Average 54 52 72
Hardness
2023 mg/L N/A N/A Range 130-220 97-170 190-250
N/A Minerals dissolved from soil and
rock. Average 163 134 230
Magnesium
2023 mg/L N/A N/A Range 4.8-12 4.1-13 11-14
N/A Erosion of soil and rock.
Average 7.1 7.8 13
pH
2023 pH Units N/A N/A Range 7.9-8.1 7.7 7.5-7.8
N/A Characteristics of water.
Average 8.0 7.7 7.6
Potassium
2017 mg/L N/A N/A Range 1.7-3.2 1.9-3.5 *
N/A Erosion of salt deposits in soil and
rock. Average 2.1 2.4 *
Sodium
2023 mg/L N/A N/A Range 10-25 7.9-52 15-30
N/A Erosion of salt deposits in soil and
rock. Average 14 30 20
UNREGULATED CONTAMINANT MONITORING1
FOURTH UNREGULATED CONTAMINANT MONITORING RULE (UCMR4)
Haloacetic Acids
2020 ug/L 60 N/A
Range ND-
1.7 ND-33 *
N/A Byproduct of drinking water
disinfection. Average 0.77 9 *
HAA6Br2
2020 ug/L N/A N/A
Range ND-
2.2 ND-30 *
N/A
Unregulated contaminant
monitoring helps U.S. EPA and
the State Water Resources
Control Board to determine
where certain contaminants occur
and whether the contaminants
need to be regulated.
Average 2.46 12 *
HAA93
2020 ug/L N/A N/A
Range ND-
2.2 ND-53 *
N/A
Unregulated contaminant
monitoring helps U.S. EPA and
the State Water Resources
Control Board to determine
where certain contaminants occur
and whether the contaminants
need to be regulated.
Average 0.77 18 *
Manganese
2020 ug/L 50 N/A
Range ND-70 ND-1.8 1.6-6.9
N/A Leaching from natural deposits.
Average 9.5 1.0 4.3
DISINFECTION BYPRODUCTS, DISINFECTANT RESIDUALS, AND DISINFECTION BYPRODUCTS PRECURSORS
Parameter
Units
MCL
PHG
(MCLG)
Range
Average
Water Source
Major Sources in Drinking Water
City of
Rialto
West
Valley Water
District
(WVWD)
San Bernardino
Valley Municipal
Water District
(BLF)
City of San
Bernardino
Encanto via BLF
Total Trihalomethanes
(TTHMs)
2023
µg/L LRAA=80 N/A
Range ND-17 6.1-38 ND-1.4
* Byproduct of drinking water
disinfection
Average 5 18.37 0.65
Haloacetic Acids
2023 µg/L LRAA=60 N/A
Range ND ND-4.7 ND
* Byproduct of drinking water
disinfection
Average ND 4.1 ND
Chlorine
2023 mg/L MRDL=4.0
(asCl2)
MRDL=4.0
(asCl2)
Range 0.7-1.18 1.0-1.2 0.71-1.53
* Byproduct of drinking water
disinfection Average .99 1.10 1.10
CITY OF RIALTO LEAD AND COPPER
Lead
2021 µg/L 15 0.2 # of Lead
Sampling 30
ND *
* Internal corrosion of household plumbing
system ND *
Lead - School Testing
2019 µg/L 15 0.2
# of Schools
Lead
Sampling
8 ND-12 * * Internal corrosion of household plumbing
system
Copper
2021 mg/L 1.3 0.3 # of Copper
Sampling 30 90th % * * Internal corrosion of household plumbing system 0.13 *
WVWD LEAD AND COPPER
Lead
2021
µg/L 15 0.2 # of Lead
Sampling 30 ND * * Internal corrosion of household plumbing system ND *
Lead - School Testing
2019 µg/L 15 0.2
# of Schools
Lead
Sampling
1 ND * * Internal corrosion of household plumbing
system
Copper
2021 mg/L 1.3 0.3 # of Copper
Sampling 30 90th % * * Internal corrosion of household plumbing system 0.17 *
* Constituent not sampled for in 2023
**Well with PFOA detection is severed from the water distribution system and is used for monitoring purposes only.
Terms Used in This Report
Maximum Contaminant Level (MCL):
MCL is the highest level of a contaminant that is allowed in drinking water. Primary MCLs are set as close to the PHGs (or MCLGs) as is economically and technologically feasible. Secondary MCLs are set to protect the odor, taste, and appearance of drinking water.
Maximum Contaminant Level Goal (MCLG):
The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs are set by the U.S.
Environmental Protection Agency (USEPA).
Public Health Goal (PHG):
The level of a contaminant in drinking water below which there is no known or expected risk to health. PHGs are set by the California Environmental Protection Agency.
Maximum Residual Disinfectant Level (MRDL):
The level of a disinfectant added for water treatment that may not be exceeded at the consumer’s tap.
Maximum Residual Disinfectant Level Goal (MRDLG):
The level of a disinfectant added for water treatment below which there is no known or expected risk to health. MRDLGs are set by the U.S. Environmental Protection Agency.
Primary Drinking Water Standards (PDWS):
MCLs and MRDLs for contaminants that affect health along with their monitoring and reporting requirements, and water treatment requirements.
Secondary Drinking Water Standards (SDWS):
MCLs for contaminants that affect taste, odor, or appearance of the drinking water. Contaminants with SDWSs do not affect the health at the MCL levels.
Treatment Technique (TT):
A required process intended to reduce the level of a contaminant in drinking water.
Regulatory Action Level (AL):
The concentration of a contaminant which, if exceeded,
triggers treatment or other requirements that a water
system must follow.
Variances and Exemptions:
Department permission to exceed an MCL or not
comply with a TT under certain conditions.
NR: no range
ND: not detectable at testing limit
(mg/L) ppm: parts per million or milligrams per liter
(µg/L) ppb: parts per billion or micrograms per liter
(ng/L) ppt: parts per trillion or nanograms per liter
(pCi/L): parts per quadrillion or pictograms per liter
µs/cm: microSiemen per centimeter; or micromho per centimeter (µmho/cm)
1 Unregulated contaminant monitoring helps U.S. EPA and the State Water Resources Control Board to determine where
certain contaminants occur and whether the contaminants need to be regulated.
2 HAA6Br: Sum of Bromochloroacetic acid,
bromodichloroacetic, dibromoacetic, dibromochloroacetic, monobromoacetic acid, and tribromoacetic.
3 HAA9: Sum of Bromochloroacetic acid, bromodichloroacetic acid, chlorodibromoacetic acid, dibromoacetic acid,
dichloroacetic acid, monobromoacetic acid, monochloroacetic acid, tribromoacetic acid and trichloroacetic acid
Units Units Equivalence
mg/L=milligrams
per liter ppm per million 1 second in 11.5
days
µg/L = micrograms
per liter
ppb = parts per
billion
1 second in nearly
32 years
ng/L = nanograms
per liter
ppt = parts per
trillion
1 second in nearly
32,000 years
pg/L = pictograms
per liter
ppq = parts per
quadrillion
1 second in nearly
32,000,000 years
Water and Employee Quality
Rialto Water Services is proud to inform residents that the Water Division has passed another annual water quality checkup. City of Rialto Water has met all the Clean Water Standards set forth by the State and Federal Governments in 2004. Part of meeting these requirements is having California Water Resources Control Board and American Water Works Association (AWWA) certified employees in water distribution, treatment and cross connection/ backflow protection. Certifications are obtained by taking college level courses in water science and engineering. We have entered into a collective bargaining agreement that has placed even higher standards on operators and certification levels. In addition, staff continues to upgrade certifications as a part of our continuing education program. State and federal certifications allow us to operate and maintain the public water system for the City of Rialto. This is just one of the many committed efforts we put towards producing clean drinking water for our customers.
Help Us Conserve This Precious Resource
• 2023 was a wetter year than previous years, but there is still a need to conserve this precious resource. Surface water levels are not back to normal and groundwater basins, where much of Rialto’s water comes from, are still depleted from the continuing drought. We all play an important role in meeting conservation targets set by the state, whether at home or work. Please review these simple water
conservation tips and help us conserve this, our most
precious natural resource.
• Fill washing machines and dishwashers before running
them. Partial loads use the same amount of water as full loads. You can save up to 1,000 gallons a month.
• Little leaks add up in a hurry. A dripping faucet or a toilet leak can add up to hundreds of gallons of wasted water.
• Turn off the water while you brush your teeth. You can save up to 500 gallons a month.
• Be sure to use low-flow showerheads and install aerators on your kitchen and bathroom faucets. They restrict the flow without compromising water pressure. You can save up to 750 gallons a month.
• Do not use a hose outside to clean sidewalks and
driveways; instead use a broom.
• Follow the Stage 2 Water Alert restrictions issued by the City.
• Be waterwise and think before you turn on the tap.
The City of Rialto offers rebate programs to help you purchase high-efficiency toilets and washing machines, smart irrigation timers, high-efficiency and automatic shut off nozzles, and turf replacement. Please visit the utility’s website at www.rialtowater.com and look for the rebate application or email [email protected] for more information.
For more conservation tips and other drought-related
information, please visit www.rialtowaterservices.com.