What was found in Warren's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 990.1 µg/L 25% of the EPA limit 4000 µg/L Main supplier: WARREN CITY PWS · 49,130 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 380 µg/L 3.8% of the EPA limit 10000 µg/L Main supplier: WARREN CITY PWS · 49,130 people · 2019
Highest in the city: 582 µg/L — PLEASANT PARK MOBILE COURT · 58 people · 2019 | 2/3 | SYR4 |
| Copper | 35 µg/L 2.7% of the EPA limit 1300 µg/L Main supplier: WARREN CITY PWS · 49,130 people · 2018
Highest in the city: 484 µg/L — BELLE ACRES MOBILE HOME PARK · 25 people · 2018 | 3/3 | SYR4 |
| Nitrate | 380 µg/L 3.8% of the EPA limit 10000 µg/L Main supplier: WARREN CITY PWS · 49,130 people · 2019 | 1/3 | SYR4 |
| Barium | 17 µg/L 0.9% of the EPA limit 2000 µg/L Main supplier: WARREN CITY PWS · 49,130 people · 2019
Highest in the city: 172.475 µg/L — BELLE ACRES MOBILE HOME PARK · 25 people · 2019 | 3/3 | SYR4 |
| TTHM | 105.51 µg/L 132% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: WARREN CITY PWS · 49,130 people · 2019 | 3/3 | SYR4 |
| Chloroform | 93.555 µg/L No EPA limit set Main supplier: WARREN CITY PWS · 49,130 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 63.975 µg/L 107% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: WARREN CITY PWS · 49,130 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 39.83 µg/L No EPA limit set Main supplier: WARREN CITY PWS · 49,130 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 25.34 µg/L No EPA limit set Main supplier: WARREN CITY PWS · 49,130 people · 2019 | 3/3 | SYR4 |
| Lead | 15.9 µg/L 106% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: WARREN CITY PWS · 49,130 people · 2018 | 2/3 | SYR4 |
| Bromodichloromethane | 13.66 µg/L No EPA limit set Main supplier: WARREN CITY PWS · 49,130 people · 2019 | 2/3 | SYR4 |
| Dibromochloromethane | 1.985 µg/L No EPA limit set Main supplier: WARREN CITY PWS · 49,130 people · 2019
Highest in the city: 4.65 µg/L — BELLE ACRES MOBILE HOME PARK · 25 people · 2019 | 2/3 | SYR4 |
| Dibromoacetic Acid | 1.5 µg/L No EPA limit set Main supplier: WARREN CITY PWS · 49,130 people · 2019
Highest in the city: 3.7293 µg/L — BELLE ACRES MOBILE HOME PARK · 25 people · 2019 | 2/3 | SYR4 |
| Monochloroacetic Acid | 3.6 µg/L No EPA limit set Main supplier: WARREN CITY PWS · 49,130 people · 2019 | 2/3 | SYR4 |
| Chromium | 3.09 µg/L 3.1% of the EPA limit 100 µg/L Highest in the city: PLEASANT PARK MOBILE COURT · 58 people · 2019 | 1/3 | SYR4 |
| Bromoform | 1.737 µg/L No EPA limit set Highest in the city: BELLE ACRES MOBILE HOME PARK · 25 people · 2019 | 1/3 | SYR4 |
| Monobromoacetic Acid | 1.6 µg/L No EPA limit set Main supplier: WARREN CITY PWS · 49,130 people · 2019 | 1/3 | SYR4 |
| Atrazine | 0.1685 µg/L 5.6% of the EPA limit 3 µg/L Main supplier: WARREN CITY PWS · 49,130 people · 2019 | 1/3 | SYR4 |
| Simazine | 0.1400 µg/L 3.5% of the EPA limit 4 µg/L Main supplier: WARREN CITY PWS · 49,130 people · 2019 | 1/3 | SYR4 |
| Pfba | 0.0098 µg/L No EPA limit set Main supplier: WARREN CITY PWS · 49,130 people · 2024 | 1/3 | UCMR-5 |
| Lead | 0.0037 mg/L 25% of the EPA limit 0.0150 mg/L Main supplier: WARREN CITY PWS · 49,130 people · 2025 | 3/3 | LCR |
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 the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Warren
| Supplier | Population served |
|---|---|
| WARREN CITY PWS | 49,130 |
| PLEASANT PARK MOBILE COURT | 58 |
| BELLE ACRES MOBILE HOME PARK | 25 |
Frequently asked questions about Warren tap water
Is Warren tap water safe to drink?
EPA testing detected 22 contaminants in the water serving Warren. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Warren?
3 public water suppliers report drinking-water monitoring for Warren, Ohio to the EPA. Each is listed above with its population served.
What contaminants are in Warren's water?
The contaminants EPA monitoring detected in Warren include Fluoride, Nitrate-Nitrite, Copper, Nitrate, Barium. The full list, with the level at the main supplier and the data source, is in the table above.
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.