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EPA SDWIS ยท Placer County, California ยท 246 providers profiled

Placer County, CA Water Quality Report

Placer County is served by 246 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 Placer County, CA

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

Quick answer: Placer County has 246 water providers profiled, sorted by population served.

Violations on file

Nitrate
Older/archived health-based violation
Found at 1 of 246 providers
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Coliform (TCR)
Older/archived health-based violation
Found at 5 of 246 providers
Surface Water Treatment Rule
Older/archived health-based violation
Found at 2 of 246 providers
Arsenic
Older/archived health-based violation
Found at 2 of 246 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 And Copper Rule Revisions
Currently open health violation
Found at 5 of 246 providers

Contaminants found

Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.0144 mg/L (ppm)
Found at 77 providers
Copper Summary
Detected: 3.25 mg/L (ppm)
Found at 10 providers
Chromium, Hex
Detected: 5.9 UG/L (ppb)
Found at 42 providers
Lead
Detected: 12 UG/L (ppb)
Found at 15 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.
Arsenic
Detected: 8.69 UG/L (ppb)
Found at 6 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.
Copper, Free
Detected: 1390 UG/L (ppb)
Found at 16 providers
Iron
Detected: 3150 UG/L (ppb)
Found at 5 providers
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Barium
Detected: 198 UG/L (ppb)
Found at 3 providers
Manganese
Detected: 945 UG/L (ppb)
Found at 5 providers
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Nickel
Detected: 20.5 UG/L (ppb)
8/7/2025
Aluminum
Detected: 448 UG/L (ppb)
Found at 4 providers
Zinc
Detected: 485 UG/L (ppb)
Found at 2 providers
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 68.3 UG/L (ppb)
Found at 25 providers
TTHM
Detected: 70.6 UG/L (ppb)
Found at 26 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: 69.3 UG/L (ppb)
Found at 26 providers
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 5.7 UG/L (ppb)
Found at 24 providers
Dibromochloromethane
Detected: 4.5 UG/L (ppb)
Found at 4 providers
Bromoform
Detected: 1 UG/L (ppb)
8/22/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Sulfate
Detected: 82 MG/L (ppm)
Found at 15 providers
Nitrite
Detected: 0.42 MG/L (ppm)
Found at 5 providers
Nitrate
Detected: 5.12 MG/L (ppm)
Found at 19 providers
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Fluoride
Detected: 1.18 MG/L (ppm)
Found at 10 providers
Often added deliberately for dental health; can also occur naturally.
Nitrate-Nitrite
Detected: 3.8 MG/L (ppm)
Found at 8 providers
Chloride
Detected: 49.4 MG/L (ppm)
Found at 15 providers
Minerals
Everyday minerals that mainly affect taste and water hardness
Sodium
Detected: 52.1 MG/L (ppm)
Found at 17 providers
Calcium
Detected: 30.2 MG/L (ppm)
Found at 20 providers
Magnesium
Detected: 13.6 MG/L (ppm)
Found at 19 providers
Potassium
Detected: 3 MG/L (ppm)
Found at 2 providers
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 120 MG/L (ppm)
Found at 19 providers
pH
Detected: 9.52 PH
Found at 19 providers
A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.
Gross Alpha Particle Activity
Detected: 4.18 PCI/L
Found at 8 providers
pH, Field
Detected: 7.49 PH
Found at 2 providers
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
PFHXS
Detected: 0.0085 ยตg/L (ppb)
1/16/2025
PFOS
Detected: 0.0043 ยตg/L (ppb)
1/16/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Lithium
Detected: 61.4 ยตg/L (ppb)
Found at 2 providers
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
VOCs (Volatile Organic Compounds)
Industrial solvents and fuel-related chemicals that evaporate easily
Tetrachloroethylene
Detected: 1.3 UG/L (ppb)
6/12/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 146 MG/L (ppm)
Found at 27 providers
Alkalinity, Carbonate
Detected: 20 MG/L (ppm)
Found at 6 providers
Other
Additional substances tested that don't fit neatly into the categories above
Alkalinity, Total
Detected: 120 MG/L (ppm)
Found at 27 providers
TDS
Detected: 250 MG/L (ppm)
Found at 17 providers
Conductivity (at 25ยฐC)
Detected: 440 UMHO/CM
Found at 18 providers
Dichloroaceticacid
Detected: 27.5 UG/L (ppb)
Found at 26 providers
Trichloroaceticacid
Detected: 40.8 UG/L (ppb)
Found at 23 providers
Monobromoaceticacid
Detected: 1.2 UG/L (ppb)
8/11/2025
Radium-228
Detected: 1.48 PCI/L
Found at 11 providers
Turbidity
Detected: 4.3 NTU
Found at 8 providers
A measure of water cloudiness from suspended particles.
Carbon, Total
Detected: 2.11 MG/L (ppm)
Found at 14 providers
Perfluorobutanesulfonicacid (PFBS)
Detected: 3 NG/L (ppt)
Found at 3 providers
Perfluorohexanesulfonicacid (PFHxS)
Detected: 8 NG/L (ppt)
Found at 3 providers
Perfluoroctanesulfonicacid (PFOS)
Detected: 4.5 NG/L (ppt)
Found at 3 providers
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluoroctanoicacid (PFOA)
Detected: 5.5 NG/L (ppt)
Found at 3 providers
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Aggressive Index
Detected: 12 AGGR
Found at 11 providers
Combined Radium (-226 & -228)
Detected: 1.63 PCI/L
Found at 7 providers
A naturally occurring radioactive element found in some groundwater.
Color
Detected: 12 UNITS
Found at 7 providers
Dibromoaceticacid
Detected: 1.4 UG/L (ppb)
Found at 2 providers
Monochloroaceticacid
Detected: 2.2 UG/L (ppb)
Found at 2 providers
Odor
Detected: 8 TON
Found at 4 providers
Hexachlorocyclopentadiene
Detected: 0.048 UG/L (ppb)
3/25/2025
Perfluoroheptanoicacid (PFHPA)
Detected: 2.1 NG/L (ppt)
Found at 2 providers
Perfluorohexanoicacid (PFHXA)
Detected: 4.9 NG/L (ppt)
Found at 2 providers
Perfluorobutanoicacid (PFBA)
Detected: 3.2 NG/L (ppt)
8/14/2025
Perfluoropentanoicacid (PFPEA)
Detected: 4.3 NG/L (ppt)
8/14/2025
Radium-226
Detected: 0.215 PCI/L
9/3/2025
Gross Beta Particle Activity
Detected: 1.95 PCI/L
9/3/2025
Perchlorate
Detected: 0.75 UG/L (ppb)
10/6/2025
Can occur naturally or from industrial/military sources; may interfere with thyroid function at elevated levels.
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
LeadPartialYesPartial
ArsenicPartialYesPartial
Chromium-6 (Hexavalent)PartialYesPartial
CopperPartialYesPartial
Combined UraniumPartialYesPartial
PFOAPartialYes*Partial
PFOSPartialYes*Partial
NitratePartialYesPartial
Combined RadiumPartialYesPartial
Alkalinity, TotalPartialYesPartial
TDSPartialYesPartial
SulfatePartialYesPartial
Conductivity (at 25ยฐC)PartialYesPartial
NitritePartialYesPartial
DichloroaceticacidPartialYesPartial
Chromium, HexPartialYesPartial
TrichloroaceticacidPartialYesPartial
FluoridePartialYesPartial
Nitrate-NitritePartialYesPartial
Copper, FreePartialYesPartial
MonobromoaceticacidPartialYesPartial
ChloridePartialYesPartial
IronPartialYesPartial
Carbon, TotalPartialYesPartial
PFHXSPartialYes*Partial
Perfluorobutanesulfonicacid (PFBS)PartialYesPartial
Perfluorohexanesulfonicacid (PFHxS)PartialYesPartial
Perfluoroctanesulfonicacid (PFOS)PartialYesPartial
Perfluoroctanoicacid (PFOA)PartialYesPartial
BariumPartialYesPartial
Aggressive IndexPartialYesPartial
Combined Radium (-226 & -228)PartialYesPartial
ManganesePartialYesPartial
NickelPartialYesPartial
AluminumPartialYesPartial
ZincPartialYesPartial
ColorPartialYesPartial
LithiumPartialYes*Partial
DibromoaceticacidPartialYesPartial
MonochloroaceticacidPartialYesPartial
OdorPartialYesPartial
HexachlorocyclopentadienePartialYesPartial
Perfluoroheptanoicacid (PFHPA)PartialYesPartial
Perfluorohexanoicacid (PFHXA)PartialYesPartial
Perfluorobutanoicacid (PFBA)PartialYesPartial
Perfluoropentanoicacid (PFPEA)PartialYesPartial
Radium-226PartialYesPartial
Gross Beta Particle ActivityPartialYesPartial
PerchloratePartialYesPartial
Coliform Bacteria (indicator)NoYesNo
SodiumNoPartialNo
CalciumNoPartialNo
Hardness, Total (ASCACO3)NoNoNo
Alkalinity, BicarbonateNoNoNo
pHNoNoNo
Gross Alpha Particle ActivityNoNoNo
MagnesiumNoPartialNo
Alkalinity, CarbonateNoNoNo
PotassiumNoPartialNo
pH, FieldNoNoNo

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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?