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Results for Modoc County, CA

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

Quick answer: Modoc County has 133 water providers profiled, sorted by population served.

Lead Summary
Adsorbableorganicfluorine
Nitrate
Chromium, Hex
PFHXS
Lithium
Lead
Copper, Free
Combined Uranium
Gross Alpha Particle Activity
Magnesium
Sodium
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
Chloride
Sulfate
TDS
Turbidity
pH
Manganese
Nickel
Chromium
Barium
Zinc
Aluminum
Conductivity (at 25°C)

Violations on file

Coliform (TCR)

Older/archived health-based violation

Found at 1 of 133 providers

Lead And Copper Rule Revisions

Currently open health violation

Found at 3 of 133 providers

Contaminants found

Metals

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

Lead Summary

Detected: 0.006 mg/L (ppm)

Found at 11 providers

Chromium, Hex

Detected: 0.9 UG/L (ppb)

Found at 2 providers

Lead

Detected: 0.55 UG/L (ppb)

6/18/2025

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: 42.6 UG/L (ppb)

6/18/2025

Combined Uranium

Detected: 8.76 PCI/L

5/13/2025

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

Manganese

Detected: 0.61 UG/L (ppb)

5/13/2025

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

Nickel

Detected: 0.73 UG/L (ppb)

5/13/2025

Chromium

Detected: 2.17 UG/L (ppb)

5/13/2025

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

Barium

Detected: 4.8 UG/L (ppb)

5/13/2025

Zinc

Detected: 5 UG/L (ppb)

5/13/2025

Aluminum

Detected: 29.3 UG/L (ppb)

5/13/2025

Inorganics

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

Nitrate

Detected: 5.89 MG/L (ppm)

Found at 4 providers

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

Chloride

Detected: 9.03 MG/L (ppm)

5/13/2025

Sulfate

Detected: 13.8 MG/L (ppm)

5/13/2025

Minerals

Everyday minerals that mainly affect taste and water hardness

Magnesium

Detected: 9.6 MG/L (ppm)

5/13/2025

Sodium

Detected: 13.5 MG/L (ppm)

5/13/2025

Calcium

Detected: 37.8 MG/L (ppm)

5/13/2025

Properties

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

Gross Alpha Particle Activity

Detected: 7.56 PCI/L

5/13/2025

Hardness, Total (ASCACO3)

Detected: 127 MG/L (ppm)

5/13/2025

Detected: 8.09 PH

5/13/2025

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

PFAS & Emerging Contaminants

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

PFHXS

Detected: 0.0035 µg/L (ppb)

2/11/2025

Lithium

Detected: 11 µg/L (ppb)

8/5/2025

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

Calculated Parameters

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

Alkalinity, Bicarbonate

Detected: 128 MG/L (ppm)

5/13/2025

Other

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

Adsorbableorganicfluorine

Detected: 2600 NG/L (ppt)

Found at 2 providers

Alkalinity, Total

Detected: 128 MG/L (ppm)

5/13/2025

TDS

Detected: 147 MG/L (ppm)

5/13/2025

Turbidity

Detected: 0.5 NTU

5/13/2025

A measure of water cloudiness from suspended particles.

Conductivity (at 25°C)

Detected: 125 UMHO/CM

5/13/2025

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
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
Adsorbableorganicfluorine	Partial	Yes	Partial
Chromium, Hex	Partial	Yes	Partial
PFHXS	Partial	Yes*	Partial
Lithium	Partial	Yes*	Partial
Copper, Free	Partial	Yes	Partial
Combined Uranium	Partial	Yes	Partial
Alkalinity, Total	Partial	Yes	Partial
Chloride	Partial	Yes	Partial
Sulfate	Partial	Yes	Partial
TDS	Partial	Yes	Partial
Manganese	Partial	Yes	Partial
Nickel	Partial	Yes	Partial
Chromium	Partial	Yes	Partial
Barium	Partial	Yes	Partial
Zinc	Partial	Yes	Partial
Aluminum	Partial	Yes	Partial
Conductivity (at 25°C)	Partial	Yes	Partial
Coliform Bacteria (indicator)	No	Yes	No
Gross Alpha Particle Activity	No	No	No
Magnesium	No	Partial	No
Sodium	No	Partial	No
Calcium	No	Partial	No
Alkalinity, Bicarbonate	No	No	No
Hardness, Total (ASCACO3)	No	No	No
pH	No	No	No

Browse by city

Individual water providers

MODOC DISTRICT FAIR No violations on file — pop. 3,500
MODOC COUNTY FAIR No violations on file — pop. 3,025
CITY OF ALTURAS Open violation — pop. 2,715 — serves ALTURAS
CALIFORNIA PINES C.S.D. Open violation — pop. 862
LOWER RUSH CREEK CAMPGROUND No violations on file — pop. 825
NEWELL COUNTY WATER DISTRICT Open violation — pop. 629
CEDARVILLE COUNTY WATER DIST. No violations on file — pop. 600
NEWELL COUNTY WATER DISTRICT No violations on file — pop. 300
ARPS TRAILER PARK No violations on file — pop. 270
MODOC NATIONAL WILDLIFE REFUGE No violations on file — pop. 250
BLUE LAKE CAMPGROUND No violations on file — pop. 235
PALO VERDE COUNTY WATER DIST No violations on file — pop. 233 — serves PALO VERDE

ADIN COMMUNITY PARK No violations on file — pop. 225
MDF-BLUE LAKE CG No violations on file — pop. 200
EAST TULE LAKE WATER DIST No violations on file — pop. 192
EAST TULE LAKE WATER DIST No violations on file — pop. 192
ADIN INN No violations on file — pop. 125
ALAMO RESTAURANT No violations on file — pop. 125
DEER SPRINGS CAMPGROUND No violations on file — pop. 125
HONKER COVE CAMPGROUND No violations on file — pop. 125
PINE CONE CAMPGROUND No violations on file — pop. 125
PATTERSON GUARD STATION No violations on file — pop. 121
STOWE RESERVOIR CAMPGROUND No violations on file — pop. 121
CALIF PINES COMM SERV DIST No violations on file — pop. 120
CAL FIRE-DEVIL'S GARDEN CAMP No violations on file — pop. 120
ISOT COMMUNITY WATER SYSTEM No violations on file — pop. 116
ALAMO RESTAURANT No violations on file — pop. 100
MILL CREEK FALLS CAMPGROUND No violations on file — pop. 90
STRONGHOLD H20 DISTRICT No violations on file — pop. 81
STRONGHOLD H20 DISTRICT No violations on file — pop. 81
BIG VALLEY PRIMARY SCHOOL No violations on file — pop. 80
BILL TIERNEY No violations on file — pop. 78
FAR EAST WATER DISTRICT No violations on file — pop. 78
SOUP SPRINGS CAMPGROUND No violations on file — pop. 70
CANBY HOTEL & RESTAURANT No violations on file — pop. 60
ISOT INC WELL 16 ISOT SCHOOL No violations on file — pop. 60
MODOC LIVESTOCK No violations on file — pop. 60
UPPER RUSH CREEK CAMPGROUND No violations on file — pop. 60
MDF-MILL CREEK FALLS CG No violations on file — pop. 60
AMBROSE WELL No violations on file — pop. 55
MDF-AMBROSE No violations on file — pop. 55
CALANDOR PINE CORP No violations on file — pop. 54
MODOC MEDICAL CENTER - CANBY CLINIC No violations on file — pop. 54
MODOC VINEYARD ACADEMY No violations on file — pop. 53
COLD SPRING SOADSIDE FTN No violations on file — pop. 50
COLD SPRING ROADSIDE FOUNTAIN No violations on file — pop. 50
COTTONWOOD FLAT CAMPGROUND No violations on file — pop. 50
ISOT INC No violations on file — pop. 50
NELSON'S FROSTY No violations on file — pop. 50
MDF-ADIN RANGER STATION No violations on file — pop. 50
NORTHEAST H20 DISTRICT No violations on file — pop. 48
CEDERVILLE TRAILER PARK No violations on file — pop. 42
BUTTE CREEK MOBILE HOME PARK No violations on file — pop. 40
BELLY ACRES R V PARK No violations on file — pop. 40
I'SOT WELL #10 No violations on file — pop. 40
DRIFTERS INN No violations on file — pop. 40
MDF-CANBY WORK CENTER No violations on file — pop. 40
MDF-STOUGH RESERVOIR CG No violations on file — pop. 40
ARLINGTON ELEMENTARY SCHOOL No violations on file — pop. 37
MJUSD-SOUTH FORK ELEMENTARY SCHOOL No violations on file — pop. 35
ALLERTON MOTEL No violations on file — pop. 35
MJUSD-STATE LINE SCHOOL No violations on file — pop. 35
LILLYLAKE PICNIC SITE No violations on file — pop. 30
HAWKS NEST No violations on file — pop. 30
NEW PINE TAVERN No violations on file — pop. 30
HAWK'S NEST TRAILER COURT No violations on file — pop. 30
ASH CREEK CAMPGROUND No violations on file — pop. 30
SULLY'S RV PARK No violations on file — pop. 30
DEPARTMENT OF TRANSPORTATION No violations on file — pop. 25
CALIF FOOD AND AG, DPI No violations on file — pop. 25
DEPARTMENT OF TRANSPORTATION No violations on file — pop. 25
CEDARVILLE TRAILER PARK No violations on file — pop. 25
SPIKE HILTON CAMPGROUND No violations on file — pop. 25
CALIFORNIA PINES No violations on file — pop. 25
CALIF DEPT OF FOOD & AG No violations on file — pop. 25
BUTTE CREEK TRAILER PARK No violations on file — pop. 25 — serves NC NEVADA FALLS
KNOB HILL STORE No violations on file — pop. 25
USFS MODOC NF No violations on file — pop. 25
USFS MODOC NF No violations on file — pop. 25
USFS MODOC NF No violations on file — pop. 25
USFS MODOC NF No violations on file — pop. 25
USFS MODOC NF No violations on file — pop. 25
USFS MODOC NF No violations on file — pop. 25
USFS MODOC NF No violations on file — pop. 25
USFS MODOC NF No violations on file — pop. 25
USFS MODOC NF No violations on file — pop. 25
USFS MODOC NF No violations on file — pop. 25
USFS MODOC NF No violations on file — pop. 25
USFS MODOC NF No violations on file — pop. 25
USFS MODOC NF No violations on file — pop. 25
USFS MODOC NF No violations on file — pop. 25
USFS MODOC NF No violations on file — pop. 25
ADIN RANGER STATION No violations on file — pop. 25
MODOC MULE No violations on file — pop. 25
SPIKE HILTON RECREATION SITE No violations on file — pop. 25
PLUM VALLEY CAMPGROUND No violations on file — pop. 25
ADIN INN No violations on file — pop. 25
USFS MODOC NF No violations on file — pop. 25
USFS MODOC NF No violations on file — pop. 25
MNF-UPPER RUSH CREEK CG Older violation on record — pop. 25
LIKELY PLACE GOLF AND RV RESORT No violations on file — pop. 25
THE ONEY FROSTY IN TOWN No violations on file — pop. 25
FORT BIDWELL HOTEL No violations on file — pop. 25
LASSEN LAND AND TRAIL TRUST - LIKELY No violations on file — pop. 25
ARROWHEAD GOLF COURSE No violations on file — pop. 25
ADIN SUPPLY CO. No violations on file — pop. 25
BIG VALLEY PRIMARY SCHOOL No violations on file — pop. 25
MDF-CEDAR CREEK No violations on file — pop. 25
SOUP SPRINGS CAMPGROUND No violations on file — pop. 24
CAVE LAKE CAMPGROUND No violations on file — pop. 20
PATTERSON GUARD STATION No violations on file — pop. 20
COTTONWOOD FLAT CAMPGROUND No violations on file — pop. 20
LOWER RUSH CREEK CAMPGROUND No violations on file — pop. 20
HONKER COVE CAMPGROUND No violations on file — pop. 20
DEER SPRING CAMPGROUND No violations on file — pop. 20
PINE CONE CAMPGROUND No violations on file — pop. 20
ADIN COMMUNITY PARK No violations on file — pop. 20
PEPPERDINE CAMPGROUND No violations on file — pop. 20
CANBY HOTEL & RESTAURANT No violations on file — pop. 20
AUCTION YARD CAFE No violations on file — pop. 20
RIM ROCK MOTEL No violations on file — pop. 15
LASSEN CREEK CAMPGROUND No violations on file — pop. 10
I'SOT WELL #12 No violations on file — pop. 10
LONG BELL GUARD STATION No violations on file — pop. 5
LONG BELL GUARD STATION No violations on file — pop. 5
SOUTHERN PACIFIC - ALTURAS No violations on file — pop. 0
CALANDOR PINE CORPORATION No violations on file — pop. 0
SOUTH FORK SCHOOL No violations on file — pop. 0
EAGLES NEST RANCH RV PARK No violations on file — pop. 0
USFS MODOC NF No violations on file — pop. 0
USFS MODOC NF No violations on file — pop. 0
USFS MODOC NF No violations on file — pop. 0
CANBY COMMUNITY SERVICES DISTRICT 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?

Modoc County, CA Water Quality Report

Violations on file

Contaminants found

Browse by city

Individual water providers