Serving roughly 267,881 people in Kern County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
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Results for CWS - BAKERSFIELD
1 water provider directly on file, serving roughly 267,881 people in Kern County, California.
Quick answer: CWS - BAKERSFIELD has no violations on file and no single reading stands out against its peers (682 other providers in this area). It serves roughly 267,881 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Lithium
PFHXS
PFOS
PFOA
PFPEA
PFHXA
PFHPA
PFBS
Aggressive Index
Langelier Index (pH(s))
Magnesium
Calcium
Sodium
Potassium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
Foamingagents (SURFACTANTS)
TDS
Chloride
Sulfate
Fluoride
Nitrate-Nitrite
Nitrate
Perfluoroctanesulfonicacid (PFOS)
Perfluorobutanesulfonicacid (PFBS)
Perfluorohexanoicacid (PFHXA)
Perfluoropentanoicacid (PFPEA)
Perfluoroctanoicacid (PFOA)
Perfluorobutanoicacid (PFBA)
Perfluorohexanesulfonicacid (PFHxS)
Perfluorononanoicacid (PFNA)
Adsorbableorganicfluorine
Perfluoroheptanoicacid (PFHPA)
Combined Uranium
Radium-228
Gross Alpha Particle Activity
pH, Field
Strontium
Boron, Total
Vanadium, Total
Iron
Manganese
Chromium, Hex
Utility CWS - BAKERSFIELDPopulation served 267,881Owner Private
No violations on file
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.0028 mg/L (ppm)
12/31/2024
Combined Uranium
Detected: 1.2 PCI/L
7/8/2025
A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.
Strontium
Detected: 320 UG/L (ppb)
9/22/2025
Vanadium, Total
Detected: 11.5 UG/L (ppb)
7/8/2025
Iron
Detected: 146 UG/L (ppb)
7/7/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Manganese
Detected: 16.2 UG/L (ppb)
7/7/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Chromium, Hex
Detected: 0.33 UG/L (ppb)
9/9/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 19 MG/L (ppm)
9/22/2025
Sulfate
Detected: 18 MG/L (ppm)
9/22/2025
Fluoride
Detected: 0.11 MG/L (ppm)
9/22/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate-Nitrite
Detected: 0.6 MG/L (ppm)
9/22/2025
Nitrate
Detected: 0.91 MG/L (ppm)
10/27/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Boron, Total
Detected: 155 UG/L (ppb)
7/7/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 2.8 MG/L (ppm)
9/22/2025
Calcium
Detected: 28 MG/L (ppm)
9/22/2025
Sodium
Detected: 21 MG/L (ppm)
9/22/2025
Potassium
Detected: 1.8 MG/L (ppm)
7/7/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: -0.6 LANG
9/22/2025
Hardness, Total (ASCACO3)
Detected: 82 MG/L (ppm)
9/22/2025
Gross Alpha Particle Activity
Detected: 1.38 PCI/L
9/9/2025
pH, Field
Detected: 7.6 PH
9/22/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 11.9 µg/L (ppb)
8/14/2024
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
PFHXS
Detected: 0.0051 µg/L (ppb)
6/12/2024
PFOS
Detected: 0.004 µg/L (ppb)
12/4/2024
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFOA
Detected: 0.0091 µg/L (ppb)
10/24/2023
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFPEA
Detected: 0.0031 µg/L (ppb)
7/11/2024
PFHXA
Detected: 0.0046 µg/L (ppb)
11/8/2023
PFHPA
Detected: 0.0035 µg/L (ppb)
10/24/2023
PFBS
Detected: 0.0031 µg/L (ppb)
5/10/2024
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 84 MG/L (ppm)
9/22/2025
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 11.4 AGGR
9/22/2025
Alkalinity, Total
Detected: 84 MG/L (ppm)
9/22/2025
Foamingagents (SURFACTANTS)
Detected: 0.085 MG/L (ppm)
9/22/2025
TDS
Detected: 180 MG/L (ppm)
9/22/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 3.8 NG/L (ppt)
10/13/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorobutanesulfonicacid (PFBS)
Detected: 2.1 NG/L (ppt)
10/9/2025
Perfluorohexanoicacid (PFHXA)
Detected: 3.5 NG/L (ppt)
10/13/2025
Perfluoropentanoicacid (PFPEA)
Detected: 4.6 NG/L (ppt)
10/13/2025
Perfluoroctanoicacid (PFOA)
Detected: 2.3 NG/L (ppt)
10/7/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorobutanoicacid (PFBA)
Detected: 2.6 NG/L (ppt)
4/10/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 3.7 NG/L (ppt)
10/10/2025
Perfluorononanoicacid (PFNA)
Detected: 2.1 NG/L (ppt)
1/14/2025
Adsorbableorganicfluorine
Detected: 980 NG/L (ppt)
1/15/2025
Perfluoroheptanoicacid (PFHPA)
Detected: 1.8 NG/L (ppt)
1/14/2025
Radium-228
Detected: 0.52 PCI/L
6/9/2025
Filtration considerations: See the table below for how whole-house carbon, under-sink reverse osmosis, and under-sink carbon systems compare against what's actually on file here. These are general system types, not a specific product recommendation.