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.
4
health-based violations
5
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| TT | Health-based | Resolved | 2010-12-01 → 2010-12-31 |
| TT | Health-based | Resolved | 2010-12-01 → 2010-12-31 |
| TT | Health-based | Resolved | 2010-12-01 → 2010-12-31 |
| TT | Health-based | Resolved | 1995-01-01 → 1999-12-31 |
| MR | Monitoring | Resolved | 1992-07-01 → 1993-07-01 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| Pfba | 0.0056 µg/L | 1/12 | 2023 |
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 |
|---|---|---|---|---|
| Chloroform | 46 µg/L No EPA limit set
worst single sample: 64 µg/L | 380/380 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 18 µg/L No EPA limit set
worst single sample: 28 µg/L | 380/380 | SYR4 | 2012–2019 |
| TTHM | 72.02 µg/L 90% of the EPA limit 80 µg/L
worst single sample: 93 µg/L | 380/380 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 23 µg/L No EPA limit set
worst single sample: 42 µg/L | 380/380 | SYR4 | 2012–2019 |
| Bromodichloromethane | 18 µg/L No EPA limit set
worst single sample: 21 µg/L | 379/380 | SYR4 | 2012–2019 |
| Dibromochloromethane | 9.7 µg/L No EPA limit set
worst single sample: 11 µg/L | 379/380 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 39.64 µg/L 66% of the EPA limit 60 µg/L
worst single sample: 63 µg/L | 379/379 | SYR4 | 2012–2019 |
| Bromoform | 2.3 µg/L No EPA limit set
worst single sample: 3.6 µg/L | 144/380 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 1.882 µg/L No EPA limit set
worst single sample: 3 µg/L | 127/380 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 5.4 µg/L No EPA limit set
worst single sample: 9.8 µg/L | 122/380 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 1.895 µg/L No EPA limit set
worst single sample: 3.3 µg/L | 82/380 | SYR4 | 2012–2019 |
| Chlorite | 298.03 µg/L 30% of the EPA limit 1000 µg/L
worst single sample: 340 µg/L | 72/81 | SYR4 | 2012–2019 |
| Nitrate | 689 µg/L 6.9% of the EPA limit 10000 µg/L
worst single sample: 1000 µg/L | 42/44 | SYR4 | 2012–2019 |
| Barium | 39 µg/L 2% of the EPA limit 2000 µg/L
worst single sample: 40 µg/L | 22/22 | SYR4 | 2012–2019 |
| Fluoride | 840 µg/L 21% of the EPA limit 4000 µg/L
worst single sample: 860 µg/L | 21/22 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 689 µg/L 6.9% of the EPA limit 10000 µg/L
worst single sample: 1000 µg/L | 21/22 | SYR4 | 2012–2019 |
| Lead | 0.0070 mg/L 47% of the EPA limit 0.0150 mg/L | 19/19 | LCR | 2025 |
| Copper | 14.075 µg/L 1.1% of the EPA limit 1300 µg/L
worst single sample: 14.5 µg/L | 18/20 | SYR4 | 2012–2019 |
| Chromium | 3.1 µg/L 3.1% of the EPA limit 100 µg/L | 10/22 | SYR4 | 2012–2019 |
| Combined Uranium | 0.4283 µg/L 1.4% of the EPA limit 30 µg/L
worst single sample: 0.4290 µg/L | 4/4 | SYR4 | 2017–2019 |
| Di(2-ethylhexyl) Phthalate | 1.574 µg/L 26% of the EPA limit 6 µg/L
worst single sample: 1.7 µg/L | 4/29 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 1.8675 pCi/L No EPA limit set
worst single sample: 1.89 pCi/L | 4/4 | SYR4 | 2017–2019 |
| Lead | 1.685 µg/L 11% of the EPA limit 15 µg/L
worst single sample: 1.7 µg/L | 4/19 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 1.3664 pCi/L 27% of the EPA limit 5 pCi/L
worst single sample: 1.42 pCi/L | 2/4 | SYR4 | 2017–2019 |
| Gross Alpha, Excl. Radon And U | 1.08 pCi/L 7.2% of the EPA limit 15 pCi/L | 1/2 | SYR4 | 2017–2019 |
| Nitrite | 27.5 µg/L 2.8% of the EPA limit 1000 µg/L | 1/22 | SYR4 | 2012–2019 |
| Toluene | 1.6 µg/L 0.2% of the EPA limit 1000 µg/L | 1/32 | SYR4 | 2012–2019 |
80 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Ocwa
Is Ocwa tap water safe to drink?
EPA monitoring detected 28 contaminants in Ocwa'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 Ocwa's water?
EPA monitoring detected Chloroform, Dichloroacetic Acid, TTHM, Trichloroacetic Acid, Bromodichloromethane, and others. The full list with the level and data source for each is above.
How many people does Ocwa serve?
Ocwa reports serving 350,000 people in New York, per its EPA record.
Has Ocwa had any water quality violations?
The EPA has 5 violations on file for Ocwa, of which 4 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.