Drinking water quality · 2025
· Verified
What's in Bakersfield, City of, CA tap water
113 contaminants were measured in the Bakersfield, City of, CA water system's 2025 annual report. Each is shown below against its federal limit — 2 sit at or above that limit.
- Reporting year
- 2025
- Contaminants measured
- 113
- Over federal limit
- 2
- Approaching the limit
- 1
- Worst contaminant
- 1,2,3-TCP
- Service area
- CA
8.0× the limit
state-level CCR
At or above the federal limit
Approaching the limit (≥ 80%)
PFAS — EPA UCMR5 (2023–2025)
1 PFAS compound above EPA limits in Bakersfield, City of, CA
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
PFOS (Perfluorooctane sulfonic acid)
● Over EPA limit (1.9×)Measured 7.6 ng/LEPA limit 4 ng/LSample year 2025Samples 3 detect / 42
below national p90 (19.900000000000006 ng/L across detecting U.S. systems)
PFNA (Perfluorononanoic acid)
● Below limitMeasured 4.7 ng/LEPA limit 10 ng/LSample year 2025Samples 1 detect / 42
below national p90 (25.08 ng/L across detecting U.S. systems)
PFHxS (Perfluorohexane sulfonic acid)
● Below limitMeasured 4.2 ng/LEPA limit 10 ng/LSample year 2025Samples 1 detect / 42
below national p90 (12.049999999999997 ng/L across detecting U.S. systems)
Lithium
● Detected (no federal limit)Measured 14.8 mg/LSample year 2024Samples 2 detect / 39
below national p90 (76.59999999999991 mg/L across detecting U.S. systems)
PWSID CA1510031 · Source: EPA UCMR5. Limits per EPA's April 2024 PFAS National Primary Drinking Water Regulation. PFAS values reported in nanograms per liter (ng/L) — note that 1 ng/L = 1 part per trillion.
Where your water comes from · EPA SDWIS
Bakersfield, City of, CA's drinking water comes from ground water, drawn from 63 sources.
Source
63ground water
- WELL CBK 36-01 - BEFORE_GAC-TCP
- WELL CBK 31-01 - BEFORE GAC
- WELL CBK 20-01 - RAW
- WELL CBK 21-01 - BEFORE_GAC-TCP
- + 59 more
Treatment
68treatment plants
- WELL CBK 18-01 - CL2
- WELL CBK 19-01 - AFTER_GAC-TCP
- WELL CBK 20-01 - CL2
- + 65 more
Distribution
0storage units
Also buys water from CWS - NORTH GARDEN, KERN COUNTY WATER AGENCY.
Source: EPA SDWIS facilities inventory. Methodology.
Historical readings · EPA Six-Year Review (2012–2019)
5 contaminants historically over EPA limits in Bakersfield, City of, CA
Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.
| Contaminant | Worst detection | EPA limit | Years (2012–2019) |
|---|---|---|---|
MERCURY worst: 2012 | 0.011 mg/L 5.5× | 0.002 mg/L | '12'14'15 |
ARSENIC worst: 2017 | 0.0384 mg/L 3.8× 2.9× the national p90 | 0.01 mg/L | '12'13'14'15'16'17'18'19 |
DBCP worst: 2016 | 0.00026 mg/L 1.3× near national p90 | 0.0002 mg/L | '12'13'14'15'16'17 |
EDB worst: 2016 | 0.00006 mg/L 1.2× | 0.00005 mg/L | '16'18'19 |
SELENIUM worst: 2018 | 0.05 mg/L 1.0× | 0.05 mg/L | '13'14'15'16'17'18 |
HAA5 worst: 2017 | 0.059 mg/L 98% | 0.06 mg/L | '12'13'14'15'16'17'18'19 |
TTHM worst: 2012 | 0.0769 mg/L 96% | 0.08 mg/L | '12'13'14'15'16'17'18'19 |
GROSS BETA worst: 2018 | 2.4 mrem/yr within | 4 mrem/yr | '18 |
NITRATE worst: 2015 | 5.9 mg/L within | 10 mg/L | '12'13'14'15'16'17'18'19 |
PCE worst: 2016 | 0.0028 mg/L within | 0.005 mg/L | '12'13'14'15'16'17'18'19 |
NITRATE NITRITE worst: 2017 | 4.4 mg/L within | 10 mg/L | '16'17'18'19 |
ANTIMONY worst: 2015 | 0.0021 mg/L within near national p90 | 0.006 mg/L | '12'13'14'15'16 |
FLUORIDE worst: 2014 | 0.98 mg/L within | 4 mg/L | '12'13'14'15'16'17'18'19 |
DICHLOROETHYLENE 11 worst: 2019 | 0.0014 mg/L within below national p90 | 0.007 mg/L | '16'17'18'19 |
NITRITE worst: 2015 | 0.17 mg/L within | 1 mg/L | '15'17'18 |
TCE worst: 2019 | 0.00068 mg/L within | 0.005 mg/L | '18'19 |
DICHLOROPROPANE 12 worst: 2018 | 0.00066 mg/L within below national p90 | 0.005 mg/L | '12'13'14'15'16'17'18'19 |
CHROMIUM worst: 2016 | 0.012 mg/L within above national p90 | 0.1 mg/L | '12'13'14'15'16 |
BARIUM worst: 2017 | 0.12 mg/L within near national p90 | 2 mg/L | '12'13'14'15'16'17'18'19 |
CYANIDE worst: 2018 | 0.01 mg/L within below national p90 | 0.2 mg/L | '18 |
CADMIUM worst: 2014 | 0.000162 mg/L within below national p90 | 0.005 mg/L | '12'14'15 |
THALLIUM worst: 2014 | 0.000026 mg/L within | 0.002 mg/L | '14 |
CIS DICHLOROETHYLENE 12 worst: 2012 | 0.00089 mg/L within below national p90 | 0.07 mg/L | '12'18'19 |
BERYLLIUM worst: 2014 | 0.000037 mg/L within below national p90 | 0.004 mg/L | '14'15 |
URANIUM worst: 2016 | 0.021 ug/L within near national p90 | 30 ug/L | '12'13'14'15'16'17'18'19 |
COPPER worst: 2012 | 0.00291 mg/L below national p90 | — | '12'13'14'15'16'17'18'19 |
LEAD worst: 2012 | 0.000492 mg/L | — | '12'13'14'15'16'17'18'19 |
DBAA worst: 2012 | 0.0017 mg/L | — | '12'13'14'15'16'17'18'19 |
DCAA worst: 2012 | 0.0098 mg/L | — | '12'13'14'15'16'17'18'19 |
MCAA worst: 2014 | 0.0054 mg/L | — | '14'17'18'19 |
TCAA worst: 2012 | 0.0049 mg/L | — | '12'13'14'15'16'17'18'19 |
BROMODICHLOROMETHANE worst: 2012 | 0.0226 mg/L | — | '12'13'14'15'16'17'18'19 |
BROMOFORM worst: 2012 | 0.0241 mg/L | — | '12'13'14'15'16'17'18'19 |
CHLOROFORM worst: 2012 | 0.0277 mg/L | — | '12'13'14'15'16'17'18'19 |
DIBROMOCHLOROMETHANE worst: 2012 | 0.0351 mg/L | — | '12'13'14'15'16'17'18'19 |
PWSID CA1510031 · Source: EPA Six-Year Review 4 (2012–2019). Values are the highest detection in each calendar year; non-detect years are omitted. Year tags above show every year with a detection.
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| 1,2,3-TCP | 0.0401094696969697 UG/LAverageSource water | 0.005 UG/LMCL | At or above the limit |
| AtrazineA widely used agricultural herbicide that reaches water through runoff. | Not detected UG/LHighest single sampleSource water | 1 UG/LMCL | None detected |
| Benzene | Not detected UG/LHighest single sampleSource water | 1 UG/LMCL | None detected |
| Benzo(a)pyrene | Not detected UG/LHighest single sampleSource water | 0.2 UG/LMCL | None detected |
| ChloroethaneA volatile organic compound used in some industrial processes. | Not detected UG/LHighest single sampleSource water | None set | None detected |
| Chloromethane | Not detected UG/LHighest single sampleSource water | None set | None detected |
| Dichlorodifluoromethane | Not detected UG/LHighest single sampleSource water | None set | None detected |
| Dichloromethane | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Ethylbenzene | Not detected UG/LHighest single sampleSource water | 300 UG/LMCL | None detected |
| Simazine | Not detected UG/LHighest single sampleSource water | 4 UG/LMCL | None detected |
| Toluene | Not detected UG/LHighest single sampleSource water | 150 UG/LMCL | None detected |
| XylenesA group of industrial solvents found in gasoline and paint. | Not detected UG/LHighest single sampleSource water | 1750 UG/LMCL | None detected |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| OdorA measure of detectable smell in the water. | 2.7413793103448274 TONAverageSource water | 3 TONMCL | Approaching the limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 190.47619047619048 MG/LAverageSource water | 1000 MG/LMCL | Within the limit |
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 287.14285714285717 UMHO/CMAverageSource water | 1600 UMHO/CMMCL | Within the limit |
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.2619047619047619 NTUAverageSource water | 5 NTUMCL | Within the limit |
| ColorA measure of visible tint in the water. | Not detected UNITSHighest single sampleSource water | 15 UNITSMCL | None detected |
| AlkalinityA measure of the water's capacity to neutralize acids. | 60.095238095238095 MG/LAverageSource water | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 76.84285714285714 MG/LAverageSource water | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 7.87054054054054 PHAverageSource water | None set | Detected — no federal limit |
| TemperatureThe measured temperature of the water sample. | 23.7 CAverageSource water | None set | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 5.068333333333333 PCI/LAverageSource water | 15 PCI/LMCL | Within the limit |
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0.1524074074074074 PCI/LAverageSource water | 5 PCI/LMCL | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| IronA naturally occurring metal common in groundwater. | 28.12 UG/LAverageSource water | 300 UG/LMCL | Within the limit |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 0.7808205128205128 UG/LAverageSource water | 10 UG/LMCL | Within the limit |
| NickelA metal from natural deposits and industrial discharge. | 2.75 UG/LAverageSource water | 100 UG/LMCL | Within the limit |
| ManganeseA naturally occurring metal from soil and rock. | 0.6550387596899225 UG/LAverageSource water | 50 UG/LMCL | Within the limit |
| ZincA naturally occurring metal that can also enter water from corroding pipes. | 7.729081632653061 UG/LAverageSource water | 5000 UG/LMCL | Within the limit |
| AluminumA common element sometimes used as a treatment coagulant. | Not detected UG/LHighest single sampleSource water | 1000 UG/LMCL | None detected |
| BoronA naturally occurring element from rock and soil. | 139.33333333333334 UG/LAverageSource water | None set | Detected — no federal limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 15.484444444444444 MG/LAverageSource water | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 2.262916666666667 MG/LAverageSource water | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 1.5291666666666668 MG/LAverageSource water | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 27.708333333333332 MG/LAverageSource water | None set | Detected — no federal limit |
| Strontium | 277.3809523809524 UG/LAverageSource water | None set | Detected — no federal limit |
| Vanadium | 9.019648093841642 UG/LAverageSource water | None set | Detected — no federal limit |
Inorganic chemicals
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | Not detected UG/LHighest single sampleSource water | 6 UG/LMCL | None detected |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Carbon Tetrachloride | Not detected UG/LHighest single sampleSource water | 0.5 UG/LMCL | None detected |
| Chlorobenzene | Not detected UG/LHighest single sampleSource water | 70 UG/LMCL | None detected |
| Deha | Not detected UG/LHighest single sampleSource water | 400 UG/LMCL | None detected |
| Dehp | Not detected UG/LHighest single sampleSource water | 4 UG/LMCL | None detected |
| Dichloroethane 12 | Not detected UG/LHighest single sampleSource water | 0.5 UG/LMCL | None detected |
| Mbaa | Not detected UG/LHighest single sampleDistribution | None set | None detected |
| O Dichlorobenzene | Not detected UG/LHighest single sampleSource water | 600 UG/LMCL | None detected |
| P Dichlorobenzene | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Styrene | Not detected UG/LHighest single sampleSource water | 100 UG/LMCL | None detected |
| Trans Dichloroethylene 12 | Not detected UG/LHighest single sampleSource water | 10 UG/LMCL | None detected |
| Trichlorobenzene 124 | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Trichloroethane 111 | Not detected UG/LHighest single sampleSource water | 200 UG/LMCL | None detected |
| Trichloroethane 112 | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Vinyl Chloride | Not detected UG/LHighest single sampleSource water | 0.5 UG/LMCL | None detected |
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid, a chlorinated PFAS compound. | Not detected NG/LHighest single sampleEntry point | None set | None detected |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)ADONA, a newer-generation PFAS replacement compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| 4:2 Fluorotelomer sulfonic acid (4:2 FTS)4:2 fluorotelomer sulfonic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleEntry point | None set | None detected |
| 6:2 Fluorotelomer sulfonic acid (6:2 FTS)6:2 fluorotelomer sulfonic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| 8:2 Fluorotelomer sulfonic acid (8:2 FTS)8:2 fluorotelomer sulfonic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleEntry point | None set | None detected |
| 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid, a chlorinated PFAS compound. | Not detected NG/LHighest single sampleEntry point | None set | None detected |
| Hexafluoropropylene oxide dimer acidHFPO-DA ('GenX chemicals'), a newer-generation PFAS replacement compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)N-ethyl perfluorooctanesulfonamidoacetic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)N-methyl perfluorooctanesulfonamidoacetic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoro-3-methoxypropanoic acid (PFMPA)Perfluoro-3-methoxypropanoic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleEntry point | None set | None detected |
| Perfluoro-4-methoxybutanoic acid (PFMBA)Perfluoro-4-methoxybutanoic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)Perfluoro(2-ethoxyethane)sulfonic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleEntry point | None set | None detected |
| Perfluorodecanoic acid (PFDA)Perfluorodecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleEntry point | None set | None detected |
| Perfluorododecanoic acid (PFDoA)Perfluorododecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleEntry point | None set | None detected |
| Perfluoroheptanoic acidPerfluoroheptanoic acid, a PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluorotetradecanoic acid (PFTeDA)Perfluorotetradecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluorotridecanoic acid (PFTrDA)Perfluorotridecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoroundecanoic acid (PFUnA)Perfluoroundecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleEntry point | None set | None detected |
| Perfluoroheptanesulfonic acid (PFHpS)Perfluoroheptanesulfonic acid, a PFAS 'forever chemical.' | 1.0484848484848486 NG/LAverageSource water | None set | Detected — no federal limit |
| Perfluorohexanoic acidPerfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' | 1.105699481865285 NG/LAverageSource water | None set | Detected — no federal limit |
| Perfluoropentanesulfonic acid (PFPeS)Perfluoropentanesulfonic acid, a PFAS 'forever chemical.' | 1.4363636363636363 NG/LAverageSource water | None set | Detected — no federal limit |
| Perfluoropentanoic acidPerfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.' | 1.0727272727272728 NG/LAverageSource water | None set | Detected — no federal limit |
| PFBAPerfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.' | 1.1545454545454545 NG/LAverageSource water | None set | Detected — no federal limit |
Source: Bakersfield, City of, CA's 2025 Consumer Confidence Report — the annual drinking-water report every U.S. utility is required to publish. The numbers on this page are the utility's own. A water-quality report covers an entire service area, not a single address.
People also ask about Bakersfield, City of, CA's water
+Is Bakersfield, City of, CA tap water safe to drink in 2025?
The 2025 Consumer Confidence Report for the Bakersfield, City of, CA water utility lists 2 contaminants at or above the federal limit: 1,2,3-TCP and PFOS. Whether that means the water is "unsafe" depends on which contaminant, how long the exposure, and individual health factors. The table on this page shows the measured value, the federal threshold, and the regulated statistic used for compliance.
+What contaminants are in Bakersfield, City of, CA tap water?
113 contaminants were measured in Bakersfield, City of, CA's 2025 Consumer Confidence Report, spanning other, pfas ("forever chemicals"), and metals. 65 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Which contaminants exceed federal limits in Bakersfield, City of, CA tap water?
2 contaminants in Bakersfield, City of, CA's 2025 report sit at or above the federal limit: 1,2,3-TCP (8.0× the limit); PFOS (1.9× the limit). The EPA enforces these limits against the regulated reporting statistic — typically a running annual average or 90th percentile — not a one-off sample spike.
+What is the worst contaminant in Bakersfield, City of, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2025 report is 1,2,3-TCP, at 8.0× the federal threshold. It belongs to the vocs & pesticides family of contaminants.
+Are any contaminants in Bakersfield, City of, CA tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: Odor. Approaching means measured but not in violation — a margin that can close quickly if conditions change.
+Where does the data on this page come from?
Every value is transcribed from Bakersfield, City of, CA's 2025 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Bakersfield, City of, CA's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2025 report; a new report will replace it once the utility publishes its next annual update.
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