Water Quality Lookup / California / Imperial County

EPA SDWIS · Imperial County, California · 136 providers profiled

Imperial County, CA Water Quality Report

Imperial County is served by 136 major public water systems on file with the EPA.

Data current as of July 2026

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Results for Imperial County, CA

136 water providers on file for this county, sorted by population served.

Quick answer: Imperial County has 136 water providers profiled, sorted by population served.

Violations on file

TTHM

Older/archived health-based violation

Found at 3 of 136 providers

A group of disinfection byproducts formed when chlorine reacts with organic matter. Long-term exposure above the legal limit has been linked to increased cancer risk in some studies.

Nitrate

Older/archived health-based violation

Found at 6 of 136 providers

Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.

Surface Water Treatment Rule

Older/archived health-based violation

Found at 3 of 136 providers

Lead And Copper Rule Revisions

Currently open health violation

Found at 24 of 136 providers

Total Haloacetic Acids (HAA5)

Older/archived health-based violation

Found at 1 of 136 providers

Fluoride

Older/archived health-based violation

Found at 1 of 136 providers

Often added deliberately for dental health; can also occur naturally.

Arsenic

Older/archived health-based violation

Found at 1 of 136 providers

Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.

Lead And Copper Rule

Currently open health violation

Found at 1 of 136 providers

Contaminants found

Metals

Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper

Lead Summary

Detected: 0.011 mg/L (ppm)

Found at 59 providers

Vanadium, Total

Detected: 7.1 UG/L (ppb)

Found at 13 providers

Iron

Detected: 2000 UG/L (ppb)

Found at 6 providers

Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.

Barium

Detected: 130 UG/L (ppb)

Found at 20 providers

Arsenic

Detected: 27 UG/L (ppb)

Found at 22 providers

Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.

Aluminum

Detected: 1500 UG/L (ppb)

Found at 23 providers

Antimony, Total

Detected: 11 UG/L (ppb)

Found at 2 providers

Cadmium

Detected: 3.7 UG/L (ppb)

Found at 2 providers

Lead

Detected: 21 UG/L (ppb)

Found at 4 providers

A metal that can leach from old pipes, solder, and fixtures. Current medical guidance holds there is no truly safe level of lead exposure, especially for children and pregnant women.

Copper, Free

Detected: 96 UG/L (ppb)

Found at 8 providers

Chromium, Hex

Detected: 13 UG/L (ppb)

Found at 4 providers

Chromium

Detected: 5.2 UG/L (ppb)

5/5/2025

Occurs in two forms — trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).

Combined Uranium

Detected: 9.07 PCI/L

7/22/2025

A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.

Copper Summary

Detected: 4.05 mg/L (ppm)

12/31/2016

Manganese

Detected: 1500 UG/L (ppb)

Found at 3 providers

Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.

Selenium

Detected: 5.3 UG/L (ppb)

2/26/2025

Disinfection Byproducts

Formed when chlorine used to disinfect water reacts with organic matter

Totalhaloaceticacids (HAA5)

Detected: 74 UG/L (ppb)

Found at 29 providers

TTHM

Detected: 230 UG/L (ppb)

Found at 34 providers

A group of disinfection byproducts formed when chlorine reacts with organic matter. Long-term exposure above the legal limit has been linked to increased cancer risk in some studies.

Chloroform

Detected: 140 UG/L (ppb)

Found at 34 providers

One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.

Bromoform

Detected: 16.1 UG/L (ppb)

Found at 33 providers

Bromodichloromethane

Detected: 62 UG/L (ppb)

Found at 34 providers

Dibromochloromethane

Detected: 26 UG/L (ppb)

Found at 34 providers

Inorganics

Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride

Fluoride

Detected: 5.1 MG/L (ppm)

Found at 27 providers

Often added deliberately for dental health; can also occur naturally.

Nitrate-Nitrite

Detected: 0.43 MG/L (ppm)

Found at 4 providers

Nitrate

Detected: 1.7 MG/L (ppm)

Found at 18 providers

Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.

Chloride

Detected: 150 MG/L (ppm)

Found at 2 providers

Sulfate

Detected: 440 MG/L (ppm)

Found at 2 providers

Boron, Total

Detected: 200 UG/L (ppb)

7/10/2025

Minerals

Everyday minerals that mainly affect taste and water hardness

Calcium

Detected: 160 MG/L (ppm)

7/10/2025

Magnesium

Detected: 47 MG/L (ppm)

7/10/2025

Potassium

Detected: 4.7 MG/L (ppm)

7/10/2025

Sodium

Detected: 160 MG/L (ppm)

7/10/2025

Properties

General water characteristics like pH, hardness, and cloudiness (turbidity)

Di(2-Ethylhexyl)Phthalate

Detected: 3.7 UG/L (ppb)

Found at 3 providers

pH

Detected: 8.1 PH

Found at 3 providers

A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.

Gross Alpha Particle Activity

Detected: 20.6 PCI/L

7/22/2025

Orthophosphate

Detected: 0.15 MG/L (ppm)

4/28/2025

Langelier Index (pH(s))

Detected: 1.4 LANG

7/10/2025

Hardness, Total (ASCACO3)

Detected: 620 MG/L (ppm)

7/10/2025

PFAS & Emerging Contaminants

Human-made "forever chemicals" and other substances not yet fully regulated

Lithium

Detected: 82.7 µg/L (ppb)

Found at 10 providers

Occurs naturally in some groundwater. Not currently federally regulated in drinking water.

Petroleum Compounds

Substances associated with fuel or petroleum contamination

Xylenes, Total

Detected: 0.74 UG/L (ppb)

8/11/2025

Benzene

Detected: 0.64 UG/L (ppb)

4/2/2025

Calculated Parameters

Values worked out mathematically from other test results, not measured directly

Alkalinity, Bicarbonate

Detected: 390 MG/L (ppm)

Found at 5 providers

Other

Additional substances tested that don't fit neatly into the categories above

Dichloroaceticacid

Detected: 46 UG/L (ppb)

Found at 31 providers

Trichloroaceticacid

Detected: 28 UG/L (ppb)

Found at 28 providers

Dibromoaceticacid

Detected: 7.8 UG/L (ppb)

Found at 32 providers

Carbon, Total

Detected: 3.6 MG/L (ppm)

Found at 8 providers

Monochloroaceticacid

Detected: 5.6 UG/L (ppb)

Found at 15 providers

Monobromoaceticacid

Detected: 1.5 UG/L (ppb)

Found at 8 providers

Alkalinity, Total

Detected: 300 MG/L (ppm)

Found at 7 providers

Perchlorate

Detected: 1.5 UG/L (ppb)

8/4/2025

Can occur naturally or from industrial/military sources; may interfere with thyroid function at elevated levels.

TDS

Detected: 1600 MG/L (ppm)

Found at 7 providers

Temperature (CENTIGRADE)

Detected: 25 C

6/25/2025

Aggressive Index

Detected: 12.68 AGGR

7/10/2025

Langelier Index (Source Temp.)

Detected: 0.8 LANG

7/10/2025

Adsorbableorganicfluorine

Detected: 2100 NG/L (ppt)

2/7/2025

Radium-228

Detected: 0.06 PCI/L

7/10/2025

Conductivity (at 25°C)

Detected: 1700 UMHO/CM

Found at 2 providers

Filtration considerations: General system types, not a specific product recommendation.

Contaminant	Whole-House Carbon	Under-Sink RO	Under-Sink Carbon
Total Trihalomethanes (TTHM)	Yes	Yes	Yes
Haloacetic Acids (HAA5)	Yes	Yes	Yes
Chloroform	Yes	Yes	Yes
Chlorine / Taste	Yes	Yes	Yes
Sediment / Turbidity	Yes	Yes	Yes
Trichloroethylene	Yes	Yes	Yes
Tetrachloroethylene	Yes	Yes	Yes
cis-1,2-Dichloroethylene	Yes	Yes	Yes
1,1-Dichloroethylene	Yes	Yes	Yes
Bromoform	Yes	Yes	Yes
Bromodichloromethane	Yes	Yes	Yes
Dibromochloromethane	Yes	Yes	Yes
1,1,2-Trichloroethane	Yes	Yes	Yes
Vinyl Chloride	Yes	Yes	Yes
Carbon Tetrachloride	Yes	Yes	Yes
Benzene	Yes	Yes	Yes
Toluene	Yes	Yes	Yes
Xylene	Yes	Yes	Yes
Totalhaloaceticacids (HAA5)	Yes	Yes	Yes
Lead	Partial	Yes	Partial
Arsenic	Partial	Yes	Partial
Chromium-6 (Hexavalent)	Partial	Yes	Partial
Copper	Partial	Yes	Partial
Combined Uranium	Partial	Yes	Partial
PFOA	Partial	Yes*	Partial
PFOS	Partial	Yes*	Partial
Nitrate	Partial	Yes	Partial
Combined Radium	Partial	Yes	Partial
Fluoride	Partial	Yes	Partial
Nitrate-Nitrite	Partial	Yes	Partial
Vanadium, Total	Partial	Yes	Partial
Iron	Partial	Yes	Partial
Barium	Partial	Yes	Partial
Aluminum	Partial	Yes	Partial
Antimony, Total	Partial	Yes	Partial
Dichloroaceticacid	Partial	Yes	Partial
Trichloroaceticacid	Partial	Yes	Partial
Dibromoaceticacid	Partial	Yes	Partial
Carbon, Total	Partial	Yes	Partial
Monochloroaceticacid	Partial	Yes	Partial
Lithium	Partial	Yes*	Partial
Monobromoaceticacid	Partial	Yes	Partial
Cadmium	Partial	Yes	Partial
Copper, Free	Partial	Yes	Partial
Alkalinity, Total	Partial	Yes	Partial
Xylenes, Total	Partial	Yes	Partial
Chromium, Hex	Partial	Yes	Partial
Chromium	Partial	Yes	Partial
Perchlorate	Partial	Yes	Partial
TDS	Partial	Yes	Partial
Combined Uranium	Partial	Yes	Partial
Manganese	Partial	Yes	Partial
Temperature (CENTIGRADE)	Partial	Yes	Partial
Aggressive Index	Partial	Yes	Partial
Langelier Index (Source Temp.)	Partial	Yes	Partial
Chloride	Partial	Yes	Partial
Sulfate	Partial	Yes	Partial
Adsorbableorganicfluorine	Partial	Yes	Partial
Boron, Total	Partial	Yes	Partial
Conductivity (at 25°C)	Partial	Yes	Partial
Selenium	Partial	Yes	Partial
Coliform Bacteria (indicator)	No	Yes	No
Di(2-Ethylhexyl)Phthalate	No	No	No
Alkalinity, Bicarbonate	No	No	No
pH	No	No	No
Gross Alpha Particle Activity	No	No	No
Orthophosphate	No	No	No
Langelier Index (pH(s))	No	No	No
Calcium	No	Partial	No
Magnesium	No	Partial	No
Potassium	No	Partial	No
Sodium	No	Partial	No
Hardness, Total (ASCACO3)	No	No	No

Browse by city

Individual water providers

EL CENTRO, CITY OF No violations on file — pop. 43,772 — serves EL CENTRO
CALEXICO, CITY OF Open violation — pop. 40,357 — serves CALEXICO
BRAWLEY, CITY OF No violations on file — pop. 26,862 — serves BRAWLEY
IMPERIAL, CITY OF Open violation — pop. 21,591 — serves IMPERIAL
CAL TRANS TWO RIVER RESTSTOP No violations on file — pop. 9,999
IMPERIAL VALLEY COLLEGE Older violation on record — pop. 8,150
COACHELLA VWD: I.D. NO. 11 No violations on file — pop. 7,500
GSWC - CALIPATRIA No violations on file — pop. 7,363
HEBER PUBLIC UTILITY DISTRICT No violations on file — pop. 6,979
HOLTVILLE, CITY OF No violations on file — pop. 6,355 — serves HOLTVILLE
STATE OF CALIF CALTRANS No violations on file — pop. 5,000
CALIPATRIA STATE PRISON No violations on file — pop. 4,800

CENTINELA STATE PRISON No violations on file — pop. 4,100
WESTMORLAND, CITY OF Open violation — pop. 2,202 — serves WESTMORLAND
NAVAL WEAPONS STATION No violations on file — pop. 1,800
GATEWAY No violations on file — pop. 1,800
SEELEY CWD Open violation — pop. 1,729
MCCABE UNION SCHOOL No violations on file — pop. 1,250
WINTERHAVEN WD No violations on file — pop. 892
SUNBEAM LAKE RV RESORT Open violation — pop. 650
NAF EL CENTRO No violations on file — pop. 637
COUNTRY LIFE MH & RV PARK Open violation — pop. 600
MEADOWS UNION ELEMENTARY SCHOOL Open violation — pop. 550
SAIKON FARMS INC No violations on file — pop. 500
IMPERIAL COUNTY HOSPITAL No violations on file — pop. 500
PILOT KNOB RV RESORT No violations on file — pop. 500
DAVID RAMIREZ No violations on file — pop. 450
308 WEST FIFTH ST HOLTVILLE No violations on file — pop. 450
PALO VERDE COUNTY WATER DIST. Open violation — pop. 410
GATEWAY OF THE AMERICAS No violations on file — pop. 400
OCOTILLO RV RESORT No violations on file — pop. 400
WINTERHAVEN COUNTY WATER DISTRICT Open violation — pop. 394
DHS CALEXICO No violations on file — pop. 330
GSA CALEXICO PORT OF ENTRY Open violation — pop. 300
SPRECKELS SUGAR COMPANY Open violation — pop. 300
MESQUITE MINES INC. Open violation — pop. 290
U.S. GYPSUM CO Open violation — pop. 280
GILMORE TRAILER PARK No violations on file — pop. 240
CHP CALEXICO PORT OF ENTRY Older violation on record — pop. 223
PINE UNION SCHOOL No violations on file — pop. 217
DATE GARDENS MOBILE HOME PARK Open violation — pop. 202
CHEMGOLD, INC. PICACHO MINE No violations on file — pop. 200
OLD EUCALYPTUS SCHOOLHOUSE No violations on file — pop. 200
SUNSET MUTUAL WATER CO No violations on file — pop. 175
SPORTSMANS PARADISE No violations on file — pop. 160
PICACHO STATE RESERVATION AREA No violations on file — pop. 155
PINE UNION SCHOOL No violations on file — pop. 150
COUNTY OF IMPERIAL No violations on file — pop. 150
OCOTILLO MUTUAL WATER CO Open violation — pop. 150
MAGNOLIA UNION SCHOOL No violations on file — pop. 142
SPORTSMANS PARADISE No violations on file — pop. 138
SANDBAR TRAILER PARK No violations on file — pop. 135
RIO BEND RV GOLF RESORT & STORM CROSSING Open violation — pop. 130
COYOTE VALLEY MUTUAL WATER CO Open violation — pop. 125
MITCHELLS CAMP FAMILY ASSOC. Older violation on record — pop. 125
CALENERGY (VULCAN POWER PLANT) No violations on file — pop. 108
WALTERS CAMP RV PARK No violations on file — pop. 102
KENNEDY'S MOBILE HOMES Older violation on record — pop. 90
MR JOE FRANCE No violations on file — pop. 90
WESTSIDE SCHOOL No violations on file — pop. 90
MULBERRY UNION SCHOOL No violations on file — pop. 85
C W ENGLUND LABOR CAMP No violations on file — pop. 80
SONNY BONO SALTON SEA WILDLIFE REFUGE No violations on file — pop. 78
WALTERS CAMP No violations on file — pop. 75
MAPES LABOR CAMP No violations on file — pop. 75
VALLEY MOBILE HOME PARK Open violation — pop. 70
IV DESERT MUSEUM SOCIETY INC. No violations on file — pop. 64
IMPERIAL DISTRICT DROP NUMBER No violations on file — pop. 60
ALL AMERICAN CANAL LINING PROJECT REACH No violations on file — pop. 60
PALM VILLA MOBILE HOME PARK Older violation on record — pop. 60
LA VALLE SABBIA INC. Open violation — pop. 60
SALAMANDER TRAILER PARK No violations on file — pop. 60
PLANT EAST MESA (PEM) UNIT 3 - FPL ENERG No violations on file — pop. 56
WILLIE'S TRUCK PARKING No violations on file — pop. 50
PALM GARDEN TRAILER PARK No violations on file — pop. 50
NEW CREATION No violations on file — pop. 50
EL CENTRO MOBILE HOME PARK Older violation on record — pop. 50
GORDON'S WELL PARK # 2 No violations on file — pop. 50
GORDON'S WELL #1 No violations on file — pop. 50
BRANDT CATTLE Open violation — pop. 50
CAMACHO'S RESTAURANT No violations on file — pop. 50
CALENERGY (ADMINISTRATIVE) No violations on file — pop. 48
WEST MAIN MUTUAL WATER CO Older violation on record — pop. 45
ALLIED WASTE OF IMPERIAL VALLEY Open violation — pop. 45
EARTHRISE NUTRITIONALS, LLC No violations on file — pop. 45
BADLEY FARMS AND CATTLE CO No violations on file — pop. 40
CALVARY CHAPEL CHURCH No violations on file — pop. 40
GOLD ROCK RANCH No violations on file — pop. 40
IMPERIAL LAKES INC. No violations on file — pop. 40
HUDSON RANCH POWER I LLC No violations on file — pop. 39
IID VILLAGE No violations on file — pop. 37
CALENERGY (SALTON SEA UNIT NO III) No violations on file — pop. 37
OCOTILLO CHEVRON STATION No violations on file — pop. 35
CENTER OF THE WORLD No violations on file — pop. 33
BLU-IN CAFE No violations on file — pop. 33
L & G TRAILER PARK No violations on file — pop. 32
HAYKINGDOM, INC. Open violation — pop. 32 — serves IMPERIAL
CHRISTIAN SERVICE CENTER OF SENATOR WASH No violations on file — pop. 31
ORMAT NEVADA NORTH BRAWLEY No violations on file — pop. 30
BEEBES No violations on file — pop. 30
BORNT 1992 IRREVOCABLE TRUST Open violation — pop. 30
CALENERGY (ELMORE POWER PLANT) No violations on file — pop. 30
CALENERGY (LEATHERS PWR PLANT) No violations on file — pop. 30
UC DESERT RESEARCH AND EXTENSION CENTER Open violation — pop. 30
RED HILL MARINA No violations on file — pop. 30
WIEST LAKE No violations on file — pop. 30
IID NORTH END CONSOLIDATION Open violation — pop. 30
DUNER'S DINER No violations on file — pop. 30
SIDEWINDER CHEVRON No violations on file — pop. 30
ONE-ELEVEN TRUCK PLAZA No violations on file — pop. 30
CALENERGY (ENG. & TECH.) No violations on file — pop. 27
CALTRANS, SAND HILL REST STOP No violations on file — pop. 26
L & J DONNELL Older violation on record — pop. 25
SHORT SHOP, INC, Older violation on record — pop. 25
RICHARD COOGAN SWS Older violation on record — pop. 25
CSP GREEN HILL MT DIABLO ST P No violations on file — pop. 25 — serves NC PARK RES
CSP MITCHELL CANYON MT DIABLO No violations on file — pop. 25 — serves NC PARK RES
CSP HEATHERINGTON No violations on file — pop. 25 — serves NC PARK RES
RANCHO FURNITURE No violations on file — pop. 25
PICACHO STATE PARK No violations on file — pop. 25
SAFETY-KLEEN DOMESTIC WATER No violations on file — pop. 25
HEBER DUNES - SVRA No violations on file — pop. 25
ENCHANTED PALMS No violations on file — pop. 25
RIVERFRONT MUTUAL WATER COMPANY No violations on file — pop. 25
JACKSON HIDE-A-WAY No violations on file — pop. 25
GLAMIS BEACH STORE No violations on file — pop. 25
SOUTH MESA CAMPGROUND No violations on file — pop. 25
YUMI DATES FREEZER FACILITY No violations on file — pop. 25
IMPERIAL IRRIGATION DISTRICT No violations on file — pop. 24
WELL ASSOCIATION WELL No violations on file — pop. 23
COCO PALMS MOBILE HOME PARK Older violation on record — pop. 15
IID DROP FOUR No violations on file — pop. 5
CAL DEPT OF WATER RESOURCES No violations on file — pop. 4 — serves DELTA FISH FACI
DOGWOOD COURTS No violations on file — pop. 2
SIDEWINDER PLATFORM SCALE - CHP No violations on file — pop. 1
SCWC, NILAND No violations on file — pop. 0

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What is TTHM? Understanding EPA Violation Status Is Chromium-6 Dangerous? Whole-House vs. Under-Sink Filtration Lead and Copper in Drinking Water What is PFAS? Arsenic and Uranium Explained Nitrate and Fluoride Explained Water Hardness, pH, and Turbidity What is Coliform Bacteria?