Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
6
health-based violations
8
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2002-11-01 → 2002-11-30 |
| MCL | Health-based | Resolved | 2002-11-01 → 2002-11-30 |
| MCL | Health-based | Resolved | 1994-06-01 → 1994-06-30 |
| MCL | Health-based | Resolved | 1994-06-01 → 1994-06-30 |
| MCL | Health-based | Resolved | 1992-09-01 → 1992-09-30 |
| MCL | Health-based | Resolved | 1992-09-01 → 1992-09-30 |
| MR | Monitoring | Resolved | 2010-01-01 → 2010-12-31 |
| MR | Monitoring | Resolved | 2010-01-01 → 2010-12-31 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
Other contaminants detected
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of this
system's samples — over 100% is worth reading, but is not by itself a
violation. Where a single sample came in higher than that percentile, it
is noted under the bar. Formal violations are listed separately.
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 6221.06 µg/L 62% of the EPA limit 10000 µg/L
worst single sample: 11000 µg/L | 2382/2572 | SYR4 | 2012–2019 |
| Arsenic | 13.576 µg/L 136% of the EPA limit, at the 95th percentile of samples — 10 µg/L
worst single sample: 19.577 µg/L | 801/1082 | SYR4 | 2012–2019 |
| TTHM | 71.12 µg/L 89% of the EPA limit 80 µg/L
worst single sample: 116.6 µg/L | 338/1107 | SYR4 | 2012–2019 |
| Chloroform | 59.365 µg/L No EPA limit set
worst single sample: 76.34 µg/L | 276/1147 | SYR4 | 2012–2019 |
| Bromodichloromethane | 15.542 µg/L No EPA limit set
worst single sample: 22.45 µg/L | 269/1149 | SYR4 | 2012–2019 |
| Dibromochloromethane | 21.8105 µg/L No EPA limit set
worst single sample: 57.42 µg/L | 224/1147 | SYR4 | 2012–2019 |
| Barium | 150 µg/L 7.5% of the EPA limit 2000 µg/L
worst single sample: 220 µg/L | 213/313 | SYR4 | 2012–2019 |
| Fluoride | 230 µg/L 5.8% of the EPA limit 4000 µg/L
worst single sample: 340 µg/L | 212/224 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 27 µg/L No EPA limit set
worst single sample: 39 µg/L | 211/255 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 60 µg/L 100% of the EPA limit 60 µg/L
worst single sample: 77 µg/L | 211/255 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 31 µg/L No EPA limit set
worst single sample: 43 µg/L | 208/255 | SYR4 | 2012–2019 |
| Trichloroethylene | 3.563 µg/L 71% of the EPA limit 5 µg/L
worst single sample: 5.15 µg/L | 163/1385 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 3.052 µg/L 61% of the EPA limit 5 µg/L
worst single sample: 4.3 µg/L | 139/1385 | SYR4 | 2012–2019 |
| Combined Uranium | 6.81824 µg/L 23% of the EPA limit 30 µg/L
worst single sample: 13.41 µg/L | 136/191 | SYR4 | 2012–2019 |
| Bromoform | 12.811 µg/L No EPA limit set
worst single sample: 35.24 µg/L | 122/1135 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 202000 µg/L 2020% of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 1000000 µg/L | 113/120 | SYR4 | 2014–2019 |
| Lead | 2.28 µg/L 15% of the EPA limit 15 µg/L
worst single sample: 23 µg/L | 79/366 | SYR4 | 2012–2019 |
| Copper | 26.05 µg/L 2% of the EPA limit 1300 µg/L
worst single sample: 170 µg/L | 78/389 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 12.4 µg/L No EPA limit set
worst single sample: 19 µg/L | 73/255 | SYR4 | 2012–2019 |
| Antimony, Total | 0.9755 µg/L 16% of the EPA limit 6 µg/L
worst single sample: 1.201 µg/L | 71/351 | SYR4 | 2012–2019 |
| Selenium | 1.4392 µg/L 2.9% of the EPA limit 50 µg/L
worst single sample: 3.2 µg/L | 63/343 | SYR4 | 2012–2019 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0835 µg/L 42% of the EPA limit 0.2000 µg/L
worst single sample: 0.0900 µg/L | 54/903 | SYR4 | 2012–2019 |
| Chromium | 3.44725 µg/L 3.4% of the EPA limit 100 µg/L
worst single sample: 6.316 µg/L | 54/340 | SYR4 | 2012–2019 |
| Cadmium | 0.0730 µg/L 1.5% of the EPA limit 5 µg/L
worst single sample: 0.1350 µg/L | 37/350 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 3.1 µg/L No EPA limit set
worst single sample: 6.7 µg/L | 34/255 | SYR4 | 2012–2019 |
| Lead | 0.0028 mg/L 19% of the EPA limit 0.0150 mg/L | 33/33 | LCR | 2024 |
| Beryllium, Total | 0.0180 µg/L 0.5% of the EPA limit 4 µg/L
worst single sample: 0.0780 µg/L | 21/328 | SYR4 | 2012–2019 |
| Lithium | 14.6 µg/L No EPA limit set | 20/96 | UCMR-5 | 2024 |
| cis-1,2-Dichloroethylene | 1.474 µg/L 2.1% of the EPA limit 70 µg/L
worst single sample: 1.61 µg/L | 18/1385 | SYR4 | 2012–2019 |
| Thallium, Total | 0.0124 µg/L 0.6% of the EPA limit 2 µg/L
worst single sample: 0.0190 µg/L | 12/339 | SYR4 | 2012–2019 |
| Mercury | 1.465 µg/L 73% of the EPA limit 2 µg/L
worst single sample: 1.6 µg/L | 10/229 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 1.865 µg/L No EPA limit set
worst single sample: 2 µg/L | 10/255 | SYR4 | 2012–2019 |
| 1,2-Dichloropropane | 0.9390 µg/L 19% of the EPA limit 5 µg/L
worst single sample: 0.9600 µg/L | 7/1385 | SYR4 | 2012–2019 |
| Xylenes, Total | 5.389 µg/L 0.1% of the EPA limit 10000 µg/L
worst single sample: 5.81 µg/L | 3/1377 | SYR4 | 2012–2019 |
| Cyanide | 10.72 µg/L 5.4% of the EPA limit 200 µg/L
worst single sample: 11 µg/L | 2/222 | SYR4 | 2012–2019 |
| Ethylbenzene | 0.7900 µg/L 0.1% of the EPA limit 700 µg/L | 1/1385 | SYR4 | 2012–2019 |
| Nitrite | 0.1200 µg/L 0% of the EPA limit 1000 µg/L | 1/227 | SYR4 | 2012–2019 |
| Toluene | 3.52 µg/L 0.4% of the EPA limit 1000 µg/L | 1/1385 | SYR4 | 2012–2019 |
68 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBromateChlorobenzeneCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinGlyphosateGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfbaPfdaPfdoaPfeesaPfhpsPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTotal Polychlorinated Biphenyls (PCB)ToxapheneVinyl ChlorideO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Cws - Bakersfield
Is Cws - Bakersfield tap water safe to drink?
EPA monitoring detected 45 contaminants in Cws - Bakersfield's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in Cws - Bakersfield's water?
EPA monitoring detected Nitrate, Arsenic, TTHM, Chloroform, Bromodichloromethane, and others. The full list with the level and data source for each is above.
How many people does Cws - Bakersfield serve?
Cws - Bakersfield reports serving 267,881 people in California, per its EPA record.
Has Cws - Bakersfield had any water quality violations?
The EPA has 8 violations on file for Cws - Bakersfield, of which 6 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.