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Results for Sierra County, CA

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

Quick answer: Sierra County has 64 water providers profiled, sorted by population served.

Lead Summary
Nitrate
pH, Field
Copper Summary
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Dichloroaceticacid
Trichloroaceticacid
Nitrite
Nitrate-Nitrite
Radium-228
Copper, Free
Chromium, Hex
Conductivity (at 25°C)
Magnesium
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
Alkalinity, Carbonate
Hardness, Total (ASCACO3)
Turbidity
Arsenic
Bromoform
Sodium
TDS
Chloride
Sulfate
pH
Barium
Zinc
Color

Violations on file

Coliform (TCR)

Older/archived health-based violation

Found at 6 of 64 providers

Lead And Copper Rule Revisions

Currently open health violation

Found at 1 of 64 providers

Contaminants found

Metals

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

Lead Summary

Detected: 0.008 mg/L (ppm)

Found at 11 providers

Copper Summary

Detected: 2.375 mg/L (ppm)

Found at 2 providers

Copper, Free

Detected: 9.2 UG/L (ppb)

8/11/2025

Chromium, Hex

Detected: 0.52 UG/L (ppb)

Found at 4 providers

Arsenic

Detected: 16 UG/L (ppb)

10/5/2025

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

Barium

Detected: 68 UG/L (ppb)

2/25/2025

Zinc

Detected: 13 UG/L (ppb)

3/11/2025

Disinfection Byproducts

Formed when chlorine used to disinfect water reacts with organic matter

Totalhaloaceticacids (HAA5)

Detected: 2.6 UG/L (ppb)

5/8/2025

TTHM

Detected: 3.5 UG/L (ppb)

Found at 2 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: 3.2 UG/L (ppb)

5/8/2025

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

Bromoform

Detected: 0.58 UG/L (ppb)

2/25/2025

Inorganics

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

Nitrate

Detected: 1.2 MG/L (ppm)

Found at 3 providers

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

Nitrite

Detected: 0.22 MG/L (ppm)

Found at 2 providers

Nitrate-Nitrite

Detected: 0.23 MG/L (ppm)

Found at 4 providers

Chloride

Detected: 3.2 MG/L (ppm)

2/25/2025

Sulfate

Detected: 10 MG/L (ppm)

2/25/2025

Minerals

Everyday minerals that mainly affect taste and water hardness

Magnesium

Detected: 0.62 MG/L (ppm)

6/23/2025

Calcium

Detected: 11 MG/L (ppm)

6/23/2025

Sodium

Detected: 19 MG/L (ppm)

3/11/2025

Properties

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

pH, Field

Detected: 7.71 PH

2/25/2025

Hardness, Total (ASCACO3)

Detected: 30 MG/L (ppm)

6/23/2025

Detected: 8.2 PH

2/25/2025

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

Calculated Parameters

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

Alkalinity, Bicarbonate

Detected: 71 MG/L (ppm)

6/23/2025

Alkalinity, Carbonate

Detected: 8.9 MG/L (ppm)

6/23/2025

Other

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

Dichloroaceticacid

Detected: 1.1 UG/L (ppb)

5/8/2025

Trichloroaceticacid

Detected: 1.5 UG/L (ppb)

5/8/2025

Radium-228

Detected: 0.555 PCI/L

5/8/2025

Conductivity (at 25°C)

Detected: 400 UMHO/CM

Found at 2 providers

Alkalinity, Total

Detected: 80 MG/L (ppm)

6/23/2025

Turbidity

Detected: 0.2 NTU

6/23/2025

A measure of water cloudiness from suspended particles.

TDS

Detected: 210 MG/L (ppm)

2/25/2025

Color

Detected: 10 UNITS

3/11/2025

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
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
Dichloroaceticacid	Partial	Yes	Partial
Trichloroaceticacid	Partial	Yes	Partial
Nitrite	Partial	Yes	Partial
Nitrate-Nitrite	Partial	Yes	Partial
Copper, Free	Partial	Yes	Partial
Chromium, Hex	Partial	Yes	Partial
Conductivity (at 25°C)	Partial	Yes	Partial
Alkalinity, Total	Partial	Yes	Partial
TDS	Partial	Yes	Partial
Chloride	Partial	Yes	Partial
Sulfate	Partial	Yes	Partial
Barium	Partial	Yes	Partial
Zinc	Partial	Yes	Partial
Color	Partial	Yes	Partial
Coliform Bacteria (indicator)	No	Yes	No
pH, Field	No	No	No
Magnesium	No	Partial	No
Calcium	No	Partial	No
Alkalinity, Bicarbonate	No	No	No
Alkalinity, Carbonate	No	No	No
Hardness, Total (ASCACO3)	No	No	No
Sodium	No	Partial	No
pH	No	No	No

Browse by city

Individual water providers

TNF-LOGGER & STAMPEDE RC No violations on file — pop. 1,200
CITY OF LOYALTON No violations on file — pop. 983 — serves LOYALTON
DOWNIEVILLE PUBLIC U.D. Open violation — pop. 783
SIERRA CSA #5, SIERRA BROOKS No violations on file — pop. 726
SIERRA WATER RESOURCES - SIERRA CITY No violations on file — pop. 324
TNF-ASPEN CREEK/PASS CREEK No violations on file — pop. 300
BASSETT'S STATION No violations on file — pop. 300
SIERRA CITY WATER WORKS, INC. No violations on file — pop. 250 — serves SIERRA CITY
SARDINE LAKE RESORT No violations on file — pop. 250
TREASURE MOUNTAIN CAMP No violations on file — pop. 200
SIERRAVILLE P.U.D. No violations on file — pop. 200
TNF-CAL-IDA WELL No violations on file — pop. 200

SIERRA CO. W.W.D #1 CALPINE No violations on file — pop. 182
SHAFFER S HIGH SIERRA CAMP No violations on file — pop. 131
GREENE ACRES PROP. O.A. No violations on file — pop. 129
PACKER LAKE LODGE No violations on file — pop. 125
BUCKHORN LODGE AND LIQUOR No violations on file — pop. 100
TNF-WILD PLUM CG No violations on file — pop. 100
TNF-SARDINE LAKE/SALMON CREEK No violations on file — pop. 100
TNF-INDIAN VALLEY/ROCKY REST CG No violations on file — pop. 95
TNF-CHAPMAN CG No violations on file — pop. 95
MC MAHON TRAILER PARK No violations on file — pop. 90
FIRM FOUNDATION ACADEMY Older violation on record — pop. 84
ALLEGHANY COUNTY W.D. No violations on file — pop. 82
HOLDEN'S MOBILE HOME PARK No violations on file — pop. 80
SIERRA SKIES R V PARK No violations on file — pop. 80
TNF-COTTONWOOD CG No violations on file — pop. 75
TNF-LITTLE TRUCKEE WS No violations on file — pop. 75
TNF-LOGANVILLE CG No violations on file — pop. 70
THE YUBAVERSE No violations on file — pop. 58
DOG VALLEY CG, TOIYABE NF No violations on file — pop. 50
NEW AGE CHURCH OF BEING-SIERRA HOT SPR. No violations on file — pop. 50
SIERRA LAND ASSOCIATES No violations on file — pop. 40
TNF-UNION FLAT CG No violations on file — pop. 40
TNF-YUBA PASS CG No violations on file — pop. 40
GOLD LAKE BOY SCOUTS No violations on file — pop. 30
CAMP PACKER CREEK, WOODLAND No violations on file — pop. 30
CAMP LEONARD, SIERRA NV F.C. No violations on file — pop. 30
FREDERICK BURNS No violations on file — pop. 26
WEBBER LAKE CAMPGROUND No violations on file — pop. 26
CAMP HAWLEY LAKE, BSA No violations on file — pop. 25
SIERRA SHANGRI-LA No violations on file — pop. 25
SHANNON'S CABINS No violations on file — pop. 25
SIMMONS WATER SYSTEM No violations on file — pop. 25
PILOT LAKE CAMP No violations on file — pop. 25
SALMON LAKE LODGE No violations on file — pop. 25
SIERRA PINES RESORT No violations on file — pop. 25
COYOTEVILLE No violations on file — pop. 25
CANYON RANCH RESORT No violations on file — pop. 23
MAPLE GROVE MUTUAL WATER CO. No violations on file — pop. 20
TNF-RAMSHORN CG Older violation on record — pop. 20
LOOKOUT CG, CRYSTAL PEAK, TOIYABE NF No violations on file — pop. 18
SHERWOOD PARK WS No violations on file — pop. 16
TSCHOPPS MUTUAL WATER CO. No violations on file — pop. 15
HASKELL CREEK No violations on file — pop. 10
CENTRAL TOWN WS Older violation on record — pop. 5
TNF-COLD CREEK CG Older violation on record — pop. 0
MOUNTAIN VIEW MOBILE H.P. Older violation on record — pop. 0
GOODYEAR'S BAR WATER SYSTEM No violations on file — pop. 0
CAMPBELL HOT SPRINGS (SIERRA) No violations on file — pop. 0
BEAR VALLEY CAMPGROUND, U.S.F.S. No violations on file — pop. 0
SATTLEY CASH STORE No violations on file — pop. 0
SIERRA PACIFIC INDUSTRIES No violations on file — pop. 0
KENTUCKY MINE AND MUSEUM Older violation on record — 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?

Sierra County, CA Water Quality Report

Violations on file

Contaminants found

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Individual water providers