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.
11
health-based violations
23
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2009-12-01 → 2009-12-31 |
| MCL | Health-based | Resolved | 2009-12-01 → 2009-12-31 |
| MCL | Health-based | Resolved | 1997-01-27 → 1997-12-31 |
| MCL | Health-based | Resolved | 1997-01-27 → 1997-12-31 |
| MCL | Health-based | Resolved | 1993-06-01 → 1993-06-30 |
| MCL | Health-based | Resolved | 1993-06-01 → 1993-06-30 |
| MCL | Health-based | Resolved | 1992-11-01 → 1992-11-30 |
| MCL | Health-based | Resolved | 1992-11-01 → 1992-11-30 |
| MCL | Health-based | Resolved | 1992-11-01 → 1992-11-30 |
| MCL | Health-based | Resolved | 1992-09-01 → 1992-09-30 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFOS | 0.0300 µg/L | 43/338 | 2025 |
| Pfpea | 0.0470 µg/L | 39/338 | 2025 |
| PFOA | 0.0160 µg/L | 36/338 | 2025 |
| Pfhxa | 0.0340 µg/L | 31/338 | 2025 |
| PFHXS | 0.0300 µg/L | 22/338 | 2025 |
| PFBS | 0.0086 µg/L | 16/338 | 2025 |
| Pfhpa | 0.0310 µg/L | 13/338 | 2025 |
| PFNA | 0.0080 µg/L | 6/338 | 2025 |
| Pfba | 0.0260 µg/L | 5/338 | 2025 |
| Pfpes | 0.0053 µg/L | 2/338 | 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 | 9718 µg/L 97% of the EPA limit 10000 µg/L
worst single sample: 20000 µg/L | 30428/31174 | SYR4 | 2012–2019 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.3100 µg/L 155% of the EPA limit, at the 95th percentile of samples — 0.2000 µg/L
worst single sample: 0.6400 µg/L | 2471/3814 | SYR4 | 2012–2019 |
| Trichloroethylene | 18 µg/L 360% of the EPA limit, at the 95th percentile of samples — 5 µg/L
worst single sample: 26 µg/L | 834/2603 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 9 µg/L 180% of the EPA limit, at the 95th percentile of samples — 5 µg/L
worst single sample: 12 µg/L | 511/2606 | SYR4 | 2012–2019 |
| TTHM | 14 µg/L 18% of the EPA limit 80 µg/L
worst single sample: 43 µg/L | 295/1440 | SYR4 | 2012–2019 |
| Fluoride | 180 µg/L 4.5% of the EPA limit 4000 µg/L
worst single sample: 1900 µg/L | 261/563 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 6890 µg/L 69% of the EPA limit 10000 µg/L
worst single sample: 16000 µg/L | 222/243 | SYR4 | 2017–2019 |
| cis-1,2-Dichloroethylene | 5.12 µg/L 7.3% of the EPA limit 70 µg/L
worst single sample: 7.1 µg/L | 205/2603 | SYR4 | 2012–2019 |
| Chloroform | 12.25 µg/L No EPA limit set
worst single sample: 38 µg/L | 196/1442 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 4.74 µg/L No EPA limit set
worst single sample: 9.1 µg/L | 167/332 | SYR4 | 2012–2019 |
| Bromodichloromethane | 3.295 µg/L No EPA limit set
worst single sample: 4.7 µg/L | 142/1424 | SYR4 | 2012–2019 |
| Ethylene Dibromide | 0.1400 µg/L 280% of the EPA limit, at the 95th percentile of samples — 0.0500 µg/L
worst single sample: 0.3100 µg/L | 137/3814 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 7.165 µg/L 12% of the EPA limit 60 µg/L
worst single sample: 12 µg/L | 128/318 | SYR4 | 2012–2019 |
| Arsenic | 6.36 µg/L 64% of the EPA limit 10 µg/L
worst single sample: 15 µg/L | 119/526 | SYR4 | 2012–2019 |
| Dibromochloromethane | 2.5 µg/L No EPA limit set
worst single sample: 3.1 µg/L | 69/1392 | SYR4 | 2012–2019 |
| Combined Uranium | 28.31 µg/L 94% of the EPA limit 30 µg/L
worst single sample: 29.8 µg/L | 66/68 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 2.76 µg/L No EPA limit set
worst single sample: 3.3 µg/L | 58/286 | SYR4 | 2012–2019 |
| Barium | 216 µg/L 11% of the EPA limit 2000 µg/L
worst single sample: 420 µg/L | 53/523 | SYR4 | 2012–2019 |
| 1,1-Dichloroethylene | 1.855 µg/L 27% of the EPA limit 7 µg/L
worst single sample: 2.7 µg/L | 50/2603 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 32/32 | LCR | 2025 |
| Bromoform | 1.725 µg/L No EPA limit set
worst single sample: 1.8 µg/L | 16/1382 | SYR4 | 2012–2019 |
| Lead | 37.1 µg/L 247% of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 42 µg/L | 8/530 | SYR4 | 2012–2019 |
| Copper | 306 µg/L 24% of the EPA limit 1300 µg/L
worst single sample: 330 µg/L | 7/523 | SYR4 | 2012–2019 |
| Chromium | 39.9 µg/L 40% of the EPA limit 100 µg/L
worst single sample: 51 µg/L | 7/523 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 1.19 µg/L No EPA limit set
worst single sample: 1.2 µg/L | 3/271 | SYR4 | 2012–2019 |
| Selenium | 52.5 µg/L 105% of the EPA limit, at the 95th percentile of samples — 50 µg/L
worst single sample: 56 µg/L | 3/524 | SYR4 | 2012–2019 |
| Endothall | 383.35 µg/L 383% of the EPA limit, at the 95th percentile of samples — 100 µg/L
worst single sample: 400 µg/L | 2/18 | SYR4 | 2012–2019 |
| Toluene | 1.453 µg/L 0.1% of the EPA limit 1000 µg/L
worst single sample: 1.5 µg/L | 2/2603 | SYR4 | 2012–2019 |
| Chlorobenzene | 0.5100 µg/L 0.5% of the EPA limit 100 µg/L | 1/2603 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) Phthalate | 7.2 µg/L 120% of the EPA limit, at the 95th percentile of samples — 6 µg/L | 1/506 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 2 µg/L No EPA limit set | 1/272 | SYR4 | 2012–2019 |
| Styrene | 0.5200 µg/L 0.5% of the EPA limit 100 µg/L | 1/2603 | SYR4 | 2012–2019 |
| Xylenes, Total | 1.9 µg/L 0% of the EPA limit 10000 µg/L | 1/2601 | SYR4 | 2012–2019 |
| trans-1,2-Dichloroethylene | 0.5100 µg/L 0.5% of the EPA limit 100 µg/L | 1/2603 | SYR4 | 2012–2019 |
67 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromateCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebDiquatEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfdaPfdoaPfeesaPfhpsPfmbaPfmpaPftaPftrdaPfunaPentachlorophenolPicloramSimazineThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneVinyl ChlorideLithiumO-DichlorobenzeneP-Dichlorobenzene
Utility contact
Frequently asked questions about City of Fresno
Is City of Fresno tap water safe to drink?
EPA monitoring detected 44 contaminants in City of Fresno'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 City of Fresno's water?
EPA monitoring detected Nitrate, 1,2-DIBROMO-3-CHLOROPROPANE, Trichloroethylene, Tetrachloroethylene, TTHM, and others. The full list with the level and data source for each is above.
How many people does City of Fresno serve?
City of Fresno reports serving 545,716 people in California, per its EPA record.
Has City of Fresno had any water quality violations?
The EPA has 23 violations on file for City of Fresno, of which 11 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.