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EPA SDWIS ยท Kern County, California ยท 682 providers profiled

Kern County, CA Water Quality Report

Kern County is served by 682 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 Kern County, CA

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

Quick answer: Kern County has 682 water providers profiled, sorted by population served.

Violations on file

Coliform (TCR)
Older/archived health-based violation
Found at 47 of 682 providers
Arsenic
Older/archived health-based violation
Found at 23 of 682 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.
Nitrate
Older/archived health-based violation
Found at 34 of 682 providers
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Fluoride
Older/archived health-based violation
Found at 6 of 682 providers
Often added deliberately for dental health; can also occur naturally.
Combined Uranium
Older/archived health-based violation
Found at 10 of 682 providers
A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.
TTHM
Older/archived health-based violation
Found at 1 of 682 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.
Lead And Copper Rule Revisions
Currently open health violation
Found at 25 of 682 providers
1, 2-Dibromo-3-Chloropropane
Older/archived health-based violation
Found at 1 of 682 providers
Nitrate-Nitrite
Older/archived health-based violation
Found at 4 of 682 providers
Revised Total Coliform Rule
Older/archived health-based violation
Found at 1 of 682 providers

Contaminants found

Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.052 mg/L (ppm)
Found at 329 providers
Copper Summary
Detected: 5.13 mg/L (ppm)
Found at 16 providers
Combined Uranium
Detected: 34 PCI/L
Found at 54 providers
A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.
Barium
Detected: 160 UG/L (ppb)
Found at 50 providers
Lead
Detected: 270 UG/L (ppb)
Found at 45 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.
Chromium, Hex
Detected: 16 UG/L (ppb)
Found at 134 providers
Arsenic
Detected: 68 UG/L (ppb)
Found at 94 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: 740 UG/L (ppb)
Found at 83 providers
Manganese
Detected: 630 UG/L (ppb)
Found at 27 providers
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Selenium
Detected: 7.7 UG/L (ppb)
Found at 23 providers
Iron
Detected: 4000 UG/L (ppb)
Found at 48 providers
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Lithium, Total
Detected: 100 UG/L (ppb)
Found at 4 providers
Strontium
Detected: 530 UG/L (ppb)
Found at 6 providers
Aluminum
Detected: 2100 UG/L (ppb)
Found at 9 providers
Vanadium, Total
Detected: 63 UG/L (ppb)
Found at 9 providers
Chromium
Detected: 31 UG/L (ppb)
Found at 11 providers
Occurs in two forms โ€” trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).
Zinc
Detected: 630 UG/L (ppb)
Found at 16 providers
Mercury
Detected: 0.4 UG/L (ppb)
Found at 2 providers
Nickel
Detected: 16 UG/L (ppb)
Found at 6 providers
Molybdenum, Total
Detected: 1 UG/L (ppb)
4/6/2025
Antimony, Total
Detected: 2.6 UG/L (ppb)
Found at 3 providers
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 40.2 UG/L (ppb)
Found at 43 providers
TTHM
Detected: 77 UG/L (ppb)
Found at 86 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: 54.6 UG/L (ppb)
Found at 45 providers
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 40 UG/L (ppb)
Found at 90 providers
Bromodichloromethane
Detected: 20 UG/L (ppb)
Found at 63 providers
Dibromochloromethane
Detected: 32 UG/L (ppb)
Found at 81 providers
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrite
Detected: 1.2 MG/L (ppm)
Found at 20 providers
Nitrate
Detected: 23 MG/L (ppm)
Found at 257 providers
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Fluoride
Detected: 3 MG/L (ppm)
Found at 91 providers
Often added deliberately for dental health; can also occur naturally.
Nitrate-Nitrite
Detected: 25 MG/L (ppm)
Found at 159 providers
Chloride
Detected: 320 MG/L (ppm)
Found at 61 providers
Sulfate
Detected: 890 MG/L (ppm)
Found at 60 providers
Boron, Total
Detected: 730 UG/L (ppb)
Found at 9 providers
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 49 MG/L (ppm)
Found at 56 providers
Calcium
Detected: 320 MG/L (ppm)
Found at 60 providers
Sodium
Detected: 200 MG/L (ppm)
Found at 58 providers
Potassium
Detected: 11 MG/L (ppm)
Found at 48 providers
Hydroxideascalciumcarbonate
Detected: 10 MG/L (ppm)
6/10/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Gross Alpha Particle Activity
Detected: 45.2 PCI/L
Found at 58 providers
Langelier Index (pH(s))
Detected: 0.68 LANG
Found at 30 providers
Hardness, Total (ASCACO3)
Detected: 810 MG/L (ppm)
Found at 57 providers
pH
Detected: 8.9 PH
Found at 58 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: 9.6 PH
Found at 13 providers
Orthophosphate
Detected: 2 MG/L (ppm)
Found at 8 providers
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 40.4 ยตg/L (ppb)
Found at 18 providers
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
PFHXS
Detected: 0.0055 ยตg/L (ppb)
Found at 3 providers
PFOS
Detected: 0.0078 ยตg/L (ppb)
Found at 4 providers
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFOA
Detected: 0.0091 ยตg/L (ppb)
Found at 3 providers
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFPEA
Detected: 0.0054 ยตg/L (ppb)
Found at 3 providers
PFHXA
Detected: 0.0049 ยตg/L (ppb)
Found at 3 providers
PFHPA
Detected: 0.0037 ยตg/L (ppb)
Found at 2 providers
PFBS
Detected: 0.0055 ยตg/L (ppb)
Found at 2 providers
PFNA
Detected: 0.0047 ยตg/L (ppb)
3/12/2025
VOCs (Volatile Organic Compounds)
Industrial solvents and fuel-related chemicals that evaporate easily
1, 2, 3-Trichloropropane
Detected: 0.21 UG/L (ppb)
Found at 50 providers
Dichloromethane
Detected: 2.8 UG/L (ppb)
Found at 2 providers
1, 2-Dichloropropane
Detected: 0.5 UG/L (ppb)
10/14/2025
Bromide
Detected: 0.16 MG/L (ppm)
6/18/2025
1, 1-Dichloroethylene
Detected: 0.7 UG/L (ppb)
2/11/2025
Tetrachloroethylene
Detected: 0.82 UG/L (ppb)
7/17/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 280 MG/L (ppm)
Found at 62 providers
Alkalinity, Carbonate
Detected: 27 MG/L (ppm)
Found at 6 providers
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 19.6 UG/L (ppb)
Found at 33 providers
Dibromoaceticacid
Detected: 17 UG/L (ppb)
Found at 53 providers
Trichloroaceticacid
Detected: 20 UG/L (ppb)
Found at 20 providers
Monochloroaceticacid
Detected: 4 UG/L (ppb)
Found at 8 providers
Perchlorate
Detected: 3.8 UG/L (ppb)
Found at 8 providers
Can occur naturally or from industrial/military sources; may interfere with thyroid function at elevated levels.
Aggressive Index
Detected: 12.8 AGGR
Found at 22 providers
Alkalinity, Total
Detected: 280 MG/L (ppm)
Found at 62 providers
TDS
Detected: 1800 MG/L (ppm)
Found at 66 providers
Conductivity (at 25ยฐC)
Detected: 2500 UMHO/CM
Found at 80 providers
Radium-228
Detected: 1.67 PCI/L
Found at 20 providers
Turbidity
Detected: 8.5 NTU
Found at 50 providers
A measure of water cloudiness from suspended particles.
Color
Detected: 20 UNITS
Found at 40 providers
Perfluorobutanesulfonicacid (PFBS)
Detected: 18 NG/L (ppt)
Found at 21 providers
Perfluorohexanesulfonicacid (PFHxS)
Detected: 7.7 NG/L (ppt)
Found at 14 providers
Perfluoroctanesulfonicacid (PFOS)
Detected: 9.8 NG/L (ppt)
Found at 14 providers
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluoroctanoicacid (PFOA)
Detected: 9.2 NG/L (ppt)
Found at 15 providers
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorohexanoicacid (PFHXA)
Detected: 9.7 NG/L (ppt)
Found at 16 providers
Perfluoropentanoicacid (PFPEA)
Detected: 8.8 NG/L (ppt)
Found at 16 providers
Perfluoroheptanoicacid (PFHPA)
Detected: 3.7 NG/L (ppt)
Found at 9 providers
Perfluorobutanoicacid (PFBA)
Detected: 3.4 NG/L (ppt)
Found at 12 providers
Radium-226
Detected: 3.65 PCI/L
Found at 5 providers
Adsorbableorganicfluorine
Detected: 5400 NG/L (ppt)
Found at 13 providers
Temperature (CENTIGRADE)
Detected: 28.3 C
Found at 7 providers
Foamingagents (SURFACTANTS)
Detected: 0.14 MG/L (ppm)
Found at 10 providers
Combined Radium (-226 & -228)
Detected: 1.63 PCI/L
Found at 8 providers
A naturally occurring radioactive element found in some groundwater.
Odor
Detected: 4 TON
Found at 9 providers
Perfluoropentanesulfonicacid (PFPES)
Detected: 2.2 NG/L (ppt)
4/17/2025
Perfluorooctanesulfonicacid6:2fts
Detected: 2.3 NG/L (ppt)
4/29/2025
Monobromoaceticacid
Detected: 2.1 UG/L (ppb)
Found at 6 providers
1, 2-Dibromo-3-Chloropropane
Detected: 0.11 UG/L (ppb)
Found at 10 providers
Silica
Detected: 17 MG/L (ppm)
Found at 2 providers
Carbon, Total
Detected: 3.1 MG/L (ppm)
Found at 4 providers
Sulfide
Detected: 3.4 MG/L (ppm)
10/7/2025
Gross Beta Particle Activity
Detected: 4.66 PCI/L
Found at 2 providers
Perfluorononanoicacid (PFNA)
Detected: 2.1 NG/L (ppt)
1/14/2025
Benzo(A)Pyrene
Detected: 0.53 UG/L (ppb)
6/9/2025
Totalnitrogen (ASN)
Detected: 3.5 MG/L (ppm)
4/3/2025
Totalkjeldahlnitrogen (INWATERMG/L)
Detected: 0.27 MG/L (ppm)
4/3/2025
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
1, 2, 3-TrichloropropaneYesYesYes
DichloromethaneYesYesYes
1, 2-DichloropropaneYesYesYes
BromideYesYesYes
LeadPartialYesPartial
ArsenicPartialYesPartial
Chromium-6 (Hexavalent)PartialYesPartial
CopperPartialYesPartial
Combined UraniumPartialYesPartial
PFOAPartialYes*Partial
PFOSPartialYes*Partial
NitratePartialYesPartial
Combined RadiumPartialYesPartial
NitritePartialYesPartial
FluoridePartialYesPartial
Nitrate-NitritePartialYesPartial
Combined UraniumPartialYesPartial
BariumPartialYesPartial
DichloroaceticacidPartialYesPartial
DibromoaceticacidPartialYesPartial
TrichloroaceticacidPartialYesPartial
MonochloroaceticacidPartialYesPartial
Chromium, HexPartialYesPartial
PerchloratePartialYesPartial
Copper, FreePartialYesPartial
Aggressive IndexPartialYesPartial
Alkalinity, TotalPartialYesPartial
TDSPartialYesPartial
ChloridePartialYesPartial
SulfatePartialYesPartial
Conductivity (at 25ยฐC)PartialYesPartial
ManganesePartialYesPartial
ColorPartialYesPartial
SeleniumPartialYesPartial
Perfluorobutanesulfonicacid (PFBS)PartialYesPartial
Perfluorohexanesulfonicacid (PFHxS)PartialYesPartial
Perfluoroctanesulfonicacid (PFOS)PartialYesPartial
Perfluoroctanoicacid (PFOA)PartialYesPartial
Perfluorohexanoicacid (PFHXA)PartialYesPartial
Perfluoropentanoicacid (PFPEA)PartialYesPartial
IronPartialYesPartial
Lithium, TotalPartialYesPartial
StrontiumPartialYesPartial
Boron, TotalPartialYesPartial
Perfluoroheptanoicacid (PFHPA)PartialYesPartial
Perfluorobutanoicacid (PFBA)PartialYesPartial
AluminumPartialYesPartial
Radium-226PartialYesPartial
AdsorbableorganicfluorinePartialYesPartial
Vanadium, TotalPartialYesPartial
ChromiumPartialYesPartial
ZincPartialYesPartial
Temperature (CENTIGRADE)PartialYesPartial
Foamingagents (SURFACTANTS)PartialYesPartial
Combined Radium (-226 & -228)PartialYesPartial
OdorPartialYesPartial
MercuryPartialYesPartial
Perfluoropentanesulfonicacid (PFPES)PartialYesPartial
Perfluorooctanesulfonicacid6:2ftsPartialYesPartial
NickelPartialYesPartial
Molybdenum, TotalPartialYesPartial
MonobromoaceticacidPartialYesPartial
1, 2-Dibromo-3-ChloropropanePartialYesPartial
Antimony, TotalPartialYesPartial
SilicaPartialYesPartial
Carbon, TotalPartialYesPartial
SulfidePartialYesPartial
Gross Beta Particle ActivityPartialYesPartial
LithiumPartialYes*Partial
PFHXSPartialYes*Partial
PFPEAPartialYes*Partial
PFHXAPartialYes*Partial
PFHPAPartialYes*Partial
PFBSPartialYes*Partial
Perfluorononanoicacid (PFNA)PartialYesPartial
Benzo(A)PyrenePartialYesPartial
Totalnitrogen (ASN)PartialYesPartial
Totalkjeldahlnitrogen (INWATERMG/L)PartialYesPartial
PFNAPartialYes*Partial
Coliform Bacteria (indicator)NoYesNo
Gross Alpha Particle ActivityNoNoNo
Langelier Index (pH(s))NoNoNo
MagnesiumNoPartialNo
CalciumNoPartialNo
SodiumNoPartialNo
Alkalinity, BicarbonateNoNoNo
Hardness, Total (ASCACO3)NoNoNo
pHNoNoNo
PotassiumNoPartialNo
pH, FieldNoNoNo
OrthophosphateNoNoNo
Alkalinity, CarbonateNoNoNo
HydroxideascalciumcarbonateNoPartialNo

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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?