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Results for Glenn County, CA

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

Quick answer: Glenn County has 107 water providers profiled, sorted by population served.

Lead Summary
Copper, Free
Nitrate
Chromium, Hex
Arsenic
Nitrite
Lead
Gross Alpha Particle Activity
Radium-228
Odor
TTHM
Chloroform
Bromodichloromethane
Dibromochloromethane
Methyltert-Butylether
Aggressive Index
Magnesium
Sodium
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
TDS
Chloride
Sulfate
Turbidity
pH
Iron
Manganese
Nickel
Barium
Zinc
Conductivity (at 25°C)
Totalhaloaceticacids (HAA5)
Dichloroaceticacid
Trichloroaceticacid
Dibromoaceticacid
Bromoform
Monochloroaceticacid
Combined Uranium
Lithium
Fluoride
Chromium
Langelier Index (pH(s))
Nitrate-Nitrite
Adsorbableorganicfluorine
pH, Field
Strontium
Perfluoroctanoicacid (PFOA)
Vanadium, Total
Selenium
Perfluorohexanesulfonicacid (PFHxS)
Perfluorononanoicacid (PFNA)
Perfluoroctanesulfonicacid (PFOS)

Violations on file

Lead And Copper Rule Revisions

Currently open health violation

Found at 3 of 107 providers

Coliform (TCR)

Older/archived health-based violation

Found at 1 of 107 providers

Contaminants found

Metals

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

Lead Summary

Detected: 0.0126 mg/L (ppm)

Found at 30 providers

Copper, Free

Detected: 270 UG/L (ppb)

Found at 9 providers

Chromium, Hex

Detected: 9.3 UG/L (ppb)

Found at 19 providers

Arsenic

Detected: 3.3 UG/L (ppb)

Found at 3 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

Detected: 6 UG/L (ppb)

Found at 2 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.

Iron

Detected: 194 UG/L (ppb)

3/12/2025

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

Manganese

Detected: 30 UG/L (ppb)

Found at 2 providers

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

Nickel

Detected: 0.64 UG/L (ppb)

3/12/2025

Barium

Detected: 147 UG/L (ppb)

Found at 3 providers

Zinc

Detected: 4490 UG/L (ppb)

Found at 2 providers

Combined Uranium

Detected: 0.824 PCI/L

Found at 2 providers

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

Chromium

Detected: 8.3 UG/L (ppb)

Found at 2 providers

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

Strontium

Detected: 400 UG/L (ppb)

6/24/2025

Vanadium, Total

Detected: 12.7 UG/L (ppb)

9/10/2025

Selenium

Detected: 1.1 UG/L (ppb)

9/10/2025

Disinfection Byproducts

Formed when chlorine used to disinfect water reacts with organic matter

TTHM

Detected: 62 UG/L (ppb)

Found at 4 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: 51.9 UG/L (ppb)

Found at 3 providers

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

Bromodichloromethane

Detected: 12 UG/L (ppb)

Found at 3 providers

Dibromochloromethane

Detected: 5 UG/L (ppb)

Found at 4 providers

Totalhaloaceticacids (HAA5)

Detected: 37 UG/L (ppb)

Found at 2 providers

Bromoform

Detected: 4 UG/L (ppb)

Found at 2 providers

Inorganics

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

Nitrate

Detected: 8.5 MG/L (ppm)

Found at 30 providers

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

Nitrite

Detected: 0.66 MG/L (ppm)

6/20/2025

Chloride

Detected: 26.8 MG/L (ppm)

Found at 4 providers

Sulfate

Detected: 36.9 MG/L (ppm)

Found at 4 providers

Fluoride

Detected: 0.3 MG/L (ppm)

Found at 3 providers

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

Nitrate-Nitrite

Detected: 2.6 MG/L (ppm)

6/24/2025

Minerals

Everyday minerals that mainly affect taste and water hardness

Magnesium

Detected: 27.4 MG/L (ppm)

Found at 2 providers

Sodium

Detected: 24.9 MG/L (ppm)

Found at 2 providers

Calcium

Detected: 63.2 MG/L (ppm)

Found at 2 providers

Properties

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

Gross Alpha Particle Activity

Detected: 3.55 PCI/L

Found at 5 providers

Hardness, Total (ASCACO3)

Detected: 276 MG/L (ppm)

Found at 2 providers

Detected: 7.7 PH

3/12/2025

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

Langelier Index (pH(s))

Detected: -0.35 LANG

6/24/2025

pH, Field

Detected: 7.8 PH

Found at 2 providers

PFAS & Emerging Contaminants

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

Lithium

Detected: 16 µg/L (ppb)

Found at 2 providers

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: 225 MG/L (ppm)

Found at 3 providers

Other

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

Radium-228

Detected: 0.641 PCI/L

Found at 3 providers

Odor

Detected: 2 TON

3/17/2025

Methyltert-Butylether

Detected: 6.6 UG/L (ppb)

4/21/2025

Aggressive Index

Detected: 12.2 AGGR

Found at 2 providers

Alkalinity, Total

Detected: 225 MG/L (ppm)

Found at 3 providers

TDS

Detected: 359 MG/L (ppm)

Found at 2 providers

Turbidity

Detected: 2 NTU

Found at 3 providers

A measure of water cloudiness from suspended particles.

Conductivity (at 25°C)

Detected: 565 UMHO/CM

Found at 3 providers

Dichloroaceticacid

Detected: 12 UG/L (ppb)

Found at 2 providers

Trichloroaceticacid

Detected: 16 UG/L (ppb)

8/19/2025

Dibromoaceticacid

Detected: 2.4 UG/L (ppb)

Found at 2 providers

Monochloroaceticacid

Detected: 7 UG/L (ppb)

8/19/2025

Adsorbableorganicfluorine

Detected: 3500 NG/L (ppt)

Found at 2 providers

Perfluoroctanoicacid (PFOA)

Detected: 2 NG/L (ppt)

10/27/2025

One of two PFAS with an enforceable federal limit (4 ppt) since 2024.

Perfluorohexanesulfonicacid (PFHxS)

Detected: 2.4 NG/L (ppt)

10/27/2025

Perfluorononanoicacid (PFNA)

Detected: 2 NG/L (ppt)

7/7/2025

Perfluoroctanesulfonicacid (PFOS)

Detected: 3.8 NG/L (ppt)

10/27/2025

One of two PFAS with an enforceable federal limit (4 ppt) since 2024.

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
Copper, Free	Partial	Yes	Partial
Chromium, Hex	Partial	Yes	Partial
Nitrite	Partial	Yes	Partial
Odor	Partial	Yes	Partial
Methyltert-Butylether	Partial	Yes	Partial
Aggressive Index	Partial	Yes	Partial
Alkalinity, Total	Partial	Yes	Partial
TDS	Partial	Yes	Partial
Chloride	Partial	Yes	Partial
Sulfate	Partial	Yes	Partial
Iron	Partial	Yes	Partial
Manganese	Partial	Yes	Partial
Nickel	Partial	Yes	Partial
Barium	Partial	Yes	Partial
Zinc	Partial	Yes	Partial
Conductivity (at 25°C)	Partial	Yes	Partial
Dichloroaceticacid	Partial	Yes	Partial
Trichloroaceticacid	Partial	Yes	Partial
Dibromoaceticacid	Partial	Yes	Partial
Monochloroaceticacid	Partial	Yes	Partial
Combined Uranium	Partial	Yes	Partial
Lithium	Partial	Yes*	Partial
Fluoride	Partial	Yes	Partial
Chromium	Partial	Yes	Partial
Nitrate-Nitrite	Partial	Yes	Partial
Adsorbableorganicfluorine	Partial	Yes	Partial
Strontium	Partial	Yes	Partial
Perfluoroctanoicacid (PFOA)	Partial	Yes	Partial
Vanadium, Total	Partial	Yes	Partial
Selenium	Partial	Yes	Partial
Perfluorohexanesulfonicacid (PFHxS)	Partial	Yes	Partial
Perfluorononanoicacid (PFNA)	Partial	Yes	Partial
Perfluoroctanesulfonicacid (PFOS)	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
Langelier Index (pH(s))	No	No	No
pH, Field	No	No	No

Browse by city

Individual water providers

CITY OF ORLAND No violations on file — pop. 8,298 — serves ORLAND
CALTRANS-WILLOWS RESTSTOP-NB No violations on file — pop. 7,500
CALTRANS-WILLOWS RESTSTOP-SB No violations on file — pop. 7,500
CAL-WATER SERVICE CO.-WILLOWS No violations on file — pop. 7,240
CAL-WATER SERVICE CO.-HAMILTON CITY No violations on file — pop. 1,799 — serves HAMILTON CITY
SOUTH WILLOWS INDUSTRIAL PARK No violations on file — pop. 1,045
SACRAMENTO NAT. WILDLIFE REFUGE No violations on file — pop. 824
WILLOWS HIGH SCHOOL No violations on file — pop. 500
JOHNS MANVILLE No violations on file — pop. 340
THUNDERHILL RACEWAY No violations on file — pop. 331
DEL ORO WC - BLACK BUTTE DISTRICT No violations on file — pop. 277
WILLOWS MOBILE HOME COMMUNITY & RV PARK No violations on file — pop. 261

ARTOIS COMMUNITY S.D. No violations on file — pop. 254
PLAZA ELEMENTARY SCHOOL No violations on file — pop. 250
ORLAND ESTATES MOBILE H.P. Open violation — pop. 244
CAPAY JOINT UNION ELEM. SCHOOL No violations on file — pop. 230
Z & M TRUCKSTOPS No violations on file — pop. 225
ELK CREEK COMMUNITY S.D. No violations on file — pop. 212
LAKE ELEMENTARY SCHOOL No violations on file — pop. 205
GOLDEN PHEASANT INN No violations on file — pop. 200
ORLAND OAKS MHP No violations on file — pop. 186
ORLAND MOBILE H.P. No violations on file — pop. 178
BLACK BUTTE LK, ORLAND BUTTES CAMPGROUND No violations on file — pop. 151
CALPLANT I, LLC No violations on file — pop. 150
BLACK BUTTE MOBILE H.P. No violations on file — pop. 148
CAL FIRE - VALLEY VIEW C.C No violations on file — pop. 140
ORLAND LDS CHURCH No violations on file — pop. 140 — serves ORLAND
OLIVAREZ HONEY BEES No violations on file — pop. 131 — serves ORLAND
MILL VALLEY CG - MENDOCINO NF No violations on file — pop. 100
BEACON ORLAND TRUCK STOP No violations on file — pop. 100
MENDOCINO NATL FOREST No violations on file — pop. 100
JERUSALEM SPRING No violations on file — pop. 100
TELEPHONE CAMPGROUND No violations on file — pop. 100
USFS STONYFORD 08-53-1803 No violations on file — pop. 82
RIVER VALLEY CHRISTIAN SCHOOL No violations on file — pop. 80
BUTTE CITY COMMUNITY S.D. No violations on file — pop. 75 — serves BUTTE CITY
GLENN GOLF & COUNTRY CLUB No violations on file — pop. 70
SYNGENTA SEEDS - GLENN PLANT Older violation on record — pop. 68
SITE STORE No violations on file — pop. 65
J & L MARKET No violations on file — pop. 65
PALISADES, THE No violations on file — pop. 62
EDDIE'S PLACE No violations on file — pop. 60
CALIFORNIA OLIVE RANCH No violations on file — pop. 50
WILLOW CREEK CHRISTIAN SCHOOL Open violation — pop. 49
ORLAND LIVESTOCK COMM. YARD, INC. No violations on file — pop. 46
BAIRD TRAILER PARK No violations on file — pop. 45
COUNTRY LEISURE MOBILE ESTATES No violations on file — pop. 40
CARRIERE FAMILY FARMS No violations on file — pop. 37
PLASKETT MEADOWS, MENDOCINO NF No violations on file — pop. 35
AFTON STORE No violations on file — pop. 32
STONYFORD TRAILER PARK No violations on file — pop. 30
CITY OF ORLAND, HAIGH FIELD PARK No violations on file — pop. 30
SEGURA'S RV PARK LLC No violations on file — pop. 27
MAYFAIR RANCHES No violations on file — pop. 25
LANGE WATER SUPPLY No violations on file — pop. 25
GRIFFIN LABOR CAMP No violations on file — pop. 25
WILLIAM CHARTER LABOR CAMP No violations on file — pop. 25
BOBBS WATER SUPPLY No violations on file — pop. 25
WHITE MALLARD DUCK CLUB 2 No violations on file — pop. 25
USFS MENDOCINO NF No violations on file — pop. 25
USFS MENDOCINO NF No violations on file — pop. 25
USFS MENDOCINO NF No violations on file — pop. 25
GARDNER'S FROSTY No violations on file — pop. 25
BAYLISS STORE No violations on file — pop. 25
GYE UNIVERSITY No violations on file — pop. 25
PAT'S GROCERY CORRAL No violations on file — pop. 25
KOEHNEN AND SONS No violations on file — pop. 25
USFS MENDOCINO NF No violations on file — pop. 25
USFS MENDOCINO NF No violations on file — pop. 25
USFS MENDOCINO NF No violations on file — pop. 25
USFS MENDOCINO NF No violations on file — pop. 25
USFS MENDOCINO NF No violations on file — pop. 25
USFS MENDOCINO NF No violations on file — pop. 25
USFS MENDOCINO NF No violations on file — pop. 25
USFS MENDOCINO NF No violations on file — pop. 25
USFS MENDOCINO NF No violations on file — pop. 25
USFS MENDOCINO NF No violations on file — pop. 25
USFS MENDOCINO NF No violations on file — pop. 25
USFS MENDOCINO NF No violations on file — pop. 25
USFS MENDOCINO NF No violations on file — pop. 25
U S BUREAU OF RECLAMATION No violations on file — pop. 25
UNCLE CHONG'S CHINESE RESTAURANT No violations on file — pop. 25
PARKWAY RV RESORT, THE No violations on file — pop. 25
RIVER GLENN No violations on file — pop. 25
IRVINE FINCH RIVER ACCESS No violations on file — pop. 25
OLD ORCHARD R.V. PARK No violations on file — pop. 25
FARMERS BREWING CO.,LLC No violations on file — pop. 25 — serves BUTTE CITY
HANK APODACA'S WATER SYSTEM Older violation on record — pop. 25
GROVE MOTEL No violations on file — pop. 24
NORTH VALLEY HIGH SCHOOL No violations on file — pop. 20
IVORY MILL STATION No violations on file — pop. 20
ARCH MOTEL No violations on file — pop. 14
ALDER SPRINGS CAMP, MENDOCINO NF No violations on file — pop. 4
CAPAY GROCERY & HARDWARE No violations on file — pop. 3
WILLOWS AIRPORT No violations on file — pop. 1
No violations on file — pop. 1
COUNTRY CLUB COURTS No violations on file — pop. 0
ORD BEND PARK No violations on file — pop. 0
HAMILTON HIGH SCHOOL No violations on file — pop. 0
USFS MENDOCINO NF No violations on file — pop. 0
USFS MENDOCINO NF No violations on file — pop. 0
USFS MENDOCINO NF No violations on file — pop. 0
USFS MENDOCINO NF No violations on file — pop. 0
USFS MENDOCINO NF No violations on file — pop. 0
USFS MENDOCINO NF No violations on file — pop. 0
TEHAMA-COLUSA CANAL AUTHORITY No violations on file — pop. 0
KELLER CABIN GROUP CAMP, MENDOCINO NF 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?

Glenn County, CA Water Quality Report

Violations on file

Contaminants found

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Individual water providers