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EPA SDWIS ยท Sutter County, California ยท 218 providers profiled

Sutter County, CA Water Quality Report

Sutter County is served by 218 major public water systems on file with the EPA.

Data current as of July 2026
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๐ŸงชReal Lab Results
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Results for Sutter County, CA

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

Quick answer: Sutter County has 218 water providers profiled, sorted by population served.

Violations on file

Nitrate
Older/archived health-based violation
Found at 21 of 218 providers
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Mercury
Older/archived health-based violation
Found at 4 of 218 providers
Coliform (TCR)
Older/archived health-based violation
Found at 20 of 218 providers
Arsenic
Older/archived health-based violation
Found at 11 of 218 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.

Contaminants found

Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.0225 mg/L (ppm)
Found at 44 providers
Iron
Detected: 876 UG/L (ppb)
Found at 3 providers
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Manganese
Detected: 468 UG/L (ppb)
Found at 4 providers
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Arsenic
Detected: 34 UG/L (ppb)
Found at 17 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.
Barium
Detected: 820 UG/L (ppb)
Found at 4 providers
Chromium, Hex
Detected: 9.9 UG/L (ppb)
Found at 9 providers
Lead
Detected: 4.9 UG/L (ppb)
Found at 5 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: 360 UG/L (ppb)
Found at 8 providers
Chromium
Detected: 9.25 UG/L (ppb)
7/17/2025
Occurs in two forms โ€” trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).
Combined Uranium
Detected: 3.86 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.
Vanadium, Total
Detected: 22 UG/L (ppb)
7/7/2025
Copper Summary
Detected: 14.7 mg/L (ppm)
Found at 2 providers
Nickel
Detected: 3.2 UG/L (ppb)
1/29/2025
Zinc
Detected: 22.9 UG/L (ppb)
1/29/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 17.3 UG/L (ppb)
Found at 3 providers
TTHM
Detected: 78 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.
Bromodichloromethane
Detected: 2.4 UG/L (ppb)
Found at 3 providers
Dibromochloromethane
Detected: 12.3 UG/L (ppb)
Found at 2 providers
Bromoform
Detected: 72 UG/L (ppb)
Found at 2 providers
Chloroform
Detected: 34 UG/L (ppb)
10/1/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 12.8 MG/L (ppm)
Found at 21 providers
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Chloride
Detected: 1000 MG/L (ppm)
Found at 3 providers
Fluoride
Detected: 0.709 MG/L (ppm)
Found at 2 providers
Often added deliberately for dental health; can also occur naturally.
Sulfate
Detected: 21 MG/L (ppm)
7/7/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 74.8 MG/L (ppm)
Found at 4 providers
Sodium
Detected: 135 MG/L (ppm)
Found at 3 providers
Calcium
Detected: 91.6 MG/L (ppm)
Found at 4 providers
Potassium
Detected: 3.2 MG/L (ppm)
7/7/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 537 MG/L (ppm)
Found at 4 providers
Gross Alpha Particle Activity
Detected: 4.8 PCI/L
Found at 2 providers
pH
Detected: 8.8 PH
Found at 4 providers
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
PFPEA
Detected: 0.0034 ยตg/L (ppb)
7/10/2023
PFHXA
Detected: 0.003 ยตg/L (ppb)
7/10/2023
VOCs (Volatile Organic Compounds)
Industrial solvents and fuel-related chemicals that evaporate easily
Chlorobenzene
Detected: 2.1 UG/L (ppb)
2/12/2025
Petroleum Compounds
Substances associated with fuel or petroleum contamination
P-Dichlorobenzene
Detected: 1.1 UG/L (ppb)
2/12/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 361 MG/L (ppm)
Found at 3 providers
Other
Additional substances tested that don't fit neatly into the categories above
Monobromoaceticacid
Detected: 1.1 UG/L (ppb)
8/19/2025
Dibromoaceticacid
Detected: 7.2 UG/L (ppb)
Found at 2 providers
TDS
Detected: 1900 MG/L (ppm)
Found at 5 providers
Conductivity (at 25ยฐC)
Detected: 3400 UMHO/CM
Found at 5 providers
Perchlorate
Detected: 6.4 UG/L (ppb)
Found at 2 providers
Can occur naturally or from industrial/military sources; may interfere with thyroid function at elevated levels.
Alkalinity, Total
Detected: 361 MG/L (ppm)
Found at 3 providers
Radium-226
Detected: 0.641 PCI/L
2/21/2025
Dichloroaceticacid
Detected: 10.9 UG/L (ppb)
Found at 2 providers
1, 2-Dibromo-3-Chloropropane
Detected: 0.01 UG/L (ppb)
2/25/2025
Trichloroaceticacid
Detected: 10 UG/L (ppb)
8/6/2025
Carbon, Total
Detected: 0.96 MG/L (ppm)
10/2/2025
Odor
Detected: 2 TON
Found at 2 providers
Aggressive Index
Detected: 11.54 AGGR
7/7/2025
Turbidity
Detected: 6.3 NTU
1/29/2025
A measure of water cloudiness from suspended particles.
Color
Detected: 12 UNITS
1/29/2025
Filtration considerations: General system types, not a specific product recommendation.
Contaminant Whole-House Carbon Under-Sink RO Under-Sink Carbon
Total Trihalomethanes (TTHM)YesYesYes
Haloacetic Acids (HAA5)YesYesYes
ChloroformYesYesYes
Chlorine / TasteYesYesYes
Sediment / TurbidityYesYesYes
TrichloroethyleneYesYesYes
TetrachloroethyleneYesYesYes
cis-1,2-DichloroethyleneYesYesYes
1,1-DichloroethyleneYesYesYes
BromoformYesYesYes
BromodichloromethaneYesYesYes
DibromochloromethaneYesYesYes
1,1,2-TrichloroethaneYesYesYes
Vinyl ChlorideYesYesYes
Carbon TetrachlorideYesYesYes
BenzeneYesYesYes
TolueneYesYesYes
XyleneYesYesYes
Totalhaloaceticacids (HAA5)YesYesYes
ChlorobenzeneYesYesYes
LeadPartialYesPartial
ArsenicPartialYesPartial
Chromium-6 (Hexavalent)PartialYesPartial
CopperPartialYesPartial
Combined UraniumPartialYesPartial
PFOAPartialYes*Partial
PFOSPartialYes*Partial
NitratePartialYesPartial
Combined RadiumPartialYesPartial
MonobromoaceticacidPartialYesPartial
DibromoaceticacidPartialYesPartial
TDSPartialYesPartial
ChloridePartialYesPartial
IronPartialYesPartial
ManganesePartialYesPartial
Conductivity (at 25ยฐC)PartialYesPartial
BariumPartialYesPartial
PerchloratePartialYesPartial
Alkalinity, TotalPartialYesPartial
Radium-226PartialYesPartial
P-DichlorobenzenePartialYesPartial
Chromium, HexPartialYesPartial
Copper, FreePartialYesPartial
ChromiumPartialYesPartial
DichloroaceticacidPartialYesPartial
Combined UraniumPartialYesPartial
PFPEAPartialYes*Partial
PFHXAPartialYes*Partial
1, 2-Dibromo-3-ChloropropanePartialYesPartial
TrichloroaceticacidPartialYesPartial
Carbon, TotalPartialYesPartial
FluoridePartialYesPartial
OdorPartialYesPartial
Aggressive IndexPartialYesPartial
SulfatePartialYesPartial
Vanadium, TotalPartialYesPartial
NickelPartialYesPartial
ZincPartialYesPartial
ColorPartialYesPartial
Coliform Bacteria (indicator)NoYesNo
MagnesiumNoPartialNo
SodiumNoPartialNo
CalciumNoPartialNo
Alkalinity, BicarbonateNoNoNo
Hardness, Total (ASCACO3)NoNoNo
Gross Alpha Particle ActivityNoNoNo
pHNoNoNo
PotassiumNoPartialNo

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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?