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EPA SDWIS ยท Yuba County, California ยท 120 providers profiled

Yuba County, CA Water Quality Report

Yuba County is served by 120 major public water systems on file with the EPA.

Data current as of July 2026
๐Ÿ”Straight from EPA
๐ŸงชReal Lab Results
๐Ÿ“…Updated Quarterly
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Results for Yuba County, CA

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

Quick answer: Yuba County has 120 water providers profiled, sorted by population served.

Violations on file

Coliform (TCR)
Older/archived health-based violation
Found at 4 of 120 providers
Lead And Copper Rule Revisions
Currently open health violation
Found at 3 of 120 providers
Nitrate
Older/archived health-based violation
Found at 1 of 120 providers
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.

Contaminants found

Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.2 mg/L (ppm)
Found at 39 providers
Copper Summary
Detected: 4.3 mg/L (ppm)
Found at 6 providers
Lead
Detected: 19 UG/L (ppb)
Found at 13 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: 1290 UG/L (ppb)
Found at 19 providers
Manganese
Detected: 1610 UG/L (ppb)
Found at 11 providers
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Arsenic
Detected: 221 UG/L (ppb)
Found at 9 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.
Iron
Detected: 2580 UG/L (ppb)
Found at 9 providers
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Chromium, Hex
Detected: 6.2 UG/L (ppb)
Found at 12 providers
Aluminum
Detected: 3260 UG/L (ppb)
7/24/2025
Zinc
Detected: 3660 UG/L (ppb)
Found at 3 providers
Barium
Detected: 235 UG/L (ppb)
Found at 3 providers
Combined Uranium
Detected: 4.7 PCI/L
9/24/2025
A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.
Vanadium, Total
Detected: 11 UG/L (ppb)
8/21/2025
Nickel
Detected: 1.4 UG/L (ppb)
9/16/2025
Chromium
Detected: 3.5 UG/L (ppb)
9/16/2025
Occurs in two forms โ€” trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).
Silver
Detected: 0.51 UG/L (ppb)
2/26/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Chloroform
Detected: 28.7 UG/L (ppb)
Found at 6 providers
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 3.8 UG/L (ppb)
Found at 7 providers
TTHM
Detected: 30 UG/L (ppb)
Found at 8 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.
Totalhaloaceticacids (HAA5)
Detected: 28 UG/L (ppb)
Found at 6 providers
Bromoform
Detected: 7.4 UG/L (ppb)
Found at 4 providers
Dibromochloromethane
Detected: 5.6 UG/L (ppb)
Found at 4 providers
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 5.89 MG/L (ppm)
Found at 27 providers
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Chloride
Detected: 24 MG/L (ppm)
Found at 5 providers
Sulfate
Detected: 161 MG/L (ppm)
Found at 5 providers
Nitrite
Detected: 0.42 MG/L (ppm)
5/12/2025
Nitrate-Nitrite
Detected: 3.8 MG/L (ppm)
Found at 3 providers
Fluoride
Detected: 0.82 MG/L (ppm)
Found at 4 providers
Often added deliberately for dental health; can also occur naturally.
Boron, Total
Detected: 55 UG/L (ppb)
5/20/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 42 MG/L (ppm)
Found at 6 providers
Sodium
Detected: 32 MG/L (ppm)
Found at 5 providers
Calcium
Detected: 73.2 MG/L (ppm)
Found at 9 providers
Potassium
Detected: 2.2 MG/L (ppm)
9/24/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Gross Alpha Particle Activity
Detected: 3.66 PCI/L
Found at 4 providers
Hardness, Total (ASCACO3)
Detected: 324 MG/L (ppm)
Found at 4 providers
pH
Detected: 8.36 PH
Found at 6 providers
A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.
pH, Field
Detected: 7.41 PH
Found at 3 providers
Orthophosphate
Detected: 0.048 MG/L (ppm)
Found at 3 providers
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
PFOS
Detected: 0.0073 ยตg/L (ppb)
1/7/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFHXS
Detected: 0.0062 ยตg/L (ppb)
1/7/2025
VOCs (Volatile Organic Compounds)
Industrial solvents and fuel-related chemicals that evaporate easily
1, 2, 3-Trichloropropane
Detected: 0.0079 UG/L (ppb)
7/16/2025
Cis-1, 2-Dichloroethylene
Detected: 2 UG/L (ppb)
Found at 2 providers
Petroleum Compounds
Substances associated with fuel or petroleum contamination
O-Chlorotoluene
Detected: 1.1 UG/L (ppb)
6/16/2025
Toluene
Detected: 5.7 UG/L (ppb)
9/19/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 230 MG/L (ppm)
Found at 8 providers
Other
Additional substances tested that don't fit neatly into the categories above
Conductivity (at 25ยฐC)
Detected: 718 UMHO/CM
Found at 7 providers
Alkalinity, Total
Detected: 230 MG/L (ppm)
Found at 8 providers
TDS
Detected: 490 MG/L (ppm)
Found at 5 providers
Perfluorobutanesulfonicacid (PFBS)
Detected: 2.3 NG/L (ppt)
8/27/2025
Color
Detected: 8 UNITS
Found at 3 providers
Turbidity
Detected: 4 NTU
Found at 3 providers
A measure of water cloudiness from suspended particles.
Odor
Detected: 4 TON
Found at 3 providers
Perchlorate
Detected: 2.7 UG/L (ppb)
6/16/2025
Can occur naturally or from industrial/military sources; may interfere with thyroid function at elevated levels.
Radium-228
Detected: 2.73 PCI/L
Found at 2 providers
Adsorbableorganicfluorine
Detected: 6500 NG/L (ppt)
9/10/2025
Dichloroaceticacid
Detected: 19 UG/L (ppb)
Found at 5 providers
Trichloroaceticacid
Detected: 11 UG/L (ppb)
Found at 5 providers
Perfluoroctanesulfonicacid (PFOS)
Detected: 3.4 NG/L (ppt)
Found at 2 providers
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorobutanoicacid (PFBA)
Detected: 6.2 NG/L (ppt)
10/20/2025
Acetone
Detected: 14 UG/L (ppb)
4/28/2025
Dibromoaceticacid
Detected: 1.7 UG/L (ppb)
Found at 3 providers
Monochloroaceticacid
Detected: 2.6 UG/L (ppb)
9/3/2025
Carbon, Total
Detected: 1.3 MG/L (ppm)
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)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
1, 2, 3-TrichloropropaneYesYesYes
Totalhaloaceticacids (HAA5)YesYesYes
LeadPartialYesPartial
ArsenicPartialYesPartial
Chromium-6 (Hexavalent)PartialYesPartial
CopperPartialYesPartial
Combined UraniumPartialYesPartial
PFOAPartialYes*Partial
PFOSPartialYes*Partial
NitratePartialYesPartial
Combined RadiumPartialYesPartial
Copper, FreePartialYesPartial
ManganesePartialYesPartial
IronPartialYesPartial
Conductivity (at 25ยฐC)PartialYesPartial
Alkalinity, TotalPartialYesPartial
TDSPartialYesPartial
ChloridePartialYesPartial
SulfatePartialYesPartial
NitritePartialYesPartial
Nitrate-NitritePartialYesPartial
Perfluorobutanesulfonicacid (PFBS)PartialYesPartial
Chromium, HexPartialYesPartial
AluminumPartialYesPartial
ColorPartialYesPartial
FluoridePartialYesPartial
OdorPartialYesPartial
ZincPartialYesPartial
BariumPartialYesPartial
O-ChlorotoluenePartialYesPartial
PerchloratePartialYesPartial
AdsorbableorganicfluorinePartialYesPartial
DichloroaceticacidPartialYesPartial
TrichloroaceticacidPartialYesPartial
Perfluoroctanesulfonicacid (PFOS)PartialYesPartial
Perfluorobutanoicacid (PFBA)PartialYesPartial
Combined UraniumPartialYesPartial
Vanadium, TotalPartialYesPartial
Boron, TotalPartialYesPartial
AcetonePartialYesPartial
NickelPartialYesPartial
ChromiumPartialYesPartial
DibromoaceticacidPartialYesPartial
PFHXSPartialYes*Partial
SilverPartialYesPartial
MonochloroaceticacidPartialYesPartial
Carbon, TotalPartialYesPartial
Coliform Bacteria (indicator)NoYesNo
Gross Alpha Particle ActivityNoNoNo
MagnesiumNoPartialNo
SodiumNoPartialNo
Hardness, Total (ASCACO3)NoNoNo
CalciumNoPartialNo
Alkalinity, BicarbonateNoNoNo
pHNoNoNo
pH, FieldNoNoNo
OrthophosphateNoNoNo
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?