Compliance record
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 |
|---|---|---|---|---|
| Copper | 43.515 µg/L 3.3% of the EPA limit 1300 µg/L
worst single sample: 290 µg/L | 2378/2676 | SYR4 | 2012–2019 |
| Lead | 21.12 µg/L 141% of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 54.2 µg/L | 1053/2672 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 13.9 µg/L 23% of the EPA limit 60 µg/L
worst single sample: 18.8 µg/L | 540/540 | SYR4 | 2012–2019 |
| Bromodichloromethane | 16.31 µg/L No EPA limit set
worst single sample: 19.7 µg/L | 539/539 | SYR4 | 2012–2019 |
| Dibromochloromethane | 21.4 µg/L No EPA limit set
worst single sample: 26.5 µg/L | 539/539 | SYR4 | 2012–2019 |
| TTHM | 61.41 µg/L 77% of the EPA limit 80 µg/L
worst single sample: 75 µg/L | 539/539 | SYR4 | 2012–2019 |
| Chloroform | 24.1 µg/L No EPA limit set
worst single sample: 38.1 µg/L | 535/539 | SYR4 | 2012–2019 |
| Bromoform | 21.29 µg/L No EPA limit set
worst single sample: 41.1 µg/L | 523/539 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 6.2895 µg/L No EPA limit set
worst single sample: 9.77 µg/L | 522/540 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 6.6835 µg/L No EPA limit set
worst single sample: 11.8 µg/L | 454/540 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 5.354 µg/L No EPA limit set
worst single sample: 7.92 µg/L | 313/540 | SYR4 | 2012–2019 |
| Nitrate | 1390 µg/L 14% of the EPA limit 10000 µg/L
worst single sample: 1550 µg/L | 238/238 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 3.326 µg/L No EPA limit set
worst single sample: 6.78 µg/L | 217/540 | SYR4 | 2012–2019 |
| Lead | 0.0021 mg/L 14% of the EPA limit 0.0150 mg/L | 66/66 | LCR | 2026 |
| Nitrate-Nitrite | 1390 µg/L 14% of the EPA limit 10000 µg/L
worst single sample: 1510 µg/L | 61/61 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 3.282 µg/L No EPA limit set
worst single sample: 6.41 µg/L | 18/540 | SYR4 | 2012–2019 |
| Barium | 40.5 µg/L 2% of the EPA limit 2000 µg/L
worst single sample: 54 µg/L | 16/16 | SYR4 | 2012–2019 |
| Fluoride | 965 µg/L 24% of the EPA limit 4000 µg/L
worst single sample: 980 µg/L | 16/16 | SYR4 | 2012–2019 |
62 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAsbestosAtrazineBenzeneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneEthylbenzeneHfpo-DaLassoMercuryNetfosaaNfdhaNmefosaaNitritePfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPfpeaPfpesPftaPftrdaPfunaSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Cincinnati Public Water
Is Cincinnati Public Water tap water safe to drink?
EPA monitoring detected 21 contaminants in Cincinnati Public Water'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 Cincinnati Public Water's water?
EPA monitoring detected Copper, Lead, Total Haloacetic Acids (HAA5), Bromodichloromethane, Dibromochloromethane, and others. The full list with the level and data source for each is above.
How many people does Cincinnati Public Water serve?
Cincinnati Public Water reports serving 750,200 people in Ohio, per its EPA record.
Has Cincinnati Public Water had any water quality violations?
The EPA has no formal drinking-water violations on file for Cincinnati Public Water.
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.