What was found in Jefferson'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 |
|---|---|---|---|
| Copper | 743.9999999999999 µg/L 57% of the EPA limit 1300 µg/L Main supplier: ASHTABULA COUNTY WATER SYSTEM · 14,757 people · 2019 | 1/1 | SYR4 |
| TTHM | 87.11999999999998 µg/L 109% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: ASHTABULA COUNTY WATER SYSTEM · 14,757 people · 2019 | 1/1 | SYR4 |
| Chloroform | 63.35999999999999 µg/L No EPA limit set Main supplier: ASHTABULA COUNTY WATER SYSTEM · 14,757 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 59.11 µg/L 99% of the EPA limit 60 µg/L Main supplier: ASHTABULA COUNTY WATER SYSTEM · 14,757 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 29.894999999999996 µg/L No EPA limit set Main supplier: ASHTABULA COUNTY WATER SYSTEM · 14,757 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 28.984999999999996 µg/L No EPA limit set Main supplier: ASHTABULA COUNTY WATER SYSTEM · 14,757 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 18.98 µg/L No EPA limit set Main supplier: ASHTABULA COUNTY WATER SYSTEM · 14,757 people · 2019 | 1/1 | SYR4 |
| Lead | 10.519999999999996 µg/L 70% of the EPA limit 15 µg/L Main supplier: ASHTABULA COUNTY WATER SYSTEM · 14,757 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 8.39 µg/L No EPA limit set Main supplier: ASHTABULA COUNTY WATER SYSTEM · 14,757 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 6.0299999999999985 µg/L No EPA limit set Main supplier: ASHTABULA COUNTY WATER SYSTEM · 14,757 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 1.5599999999999994 µg/L No EPA limit set Main supplier: ASHTABULA COUNTY WATER SYSTEM · 14,757 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 1.5 µg/L No EPA limit set Main supplier: ASHTABULA COUNTY WATER SYSTEM · 14,757 people · 2019 | 1/1 | SYR4 |
| Bromoform | 0.8350 µg/L No EPA limit set Main supplier: ASHTABULA COUNTY WATER SYSTEM · 14,757 people · 2019 | 1/1 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: ASHTABULA COUNTY WATER SYSTEM · 14,757 people · 2026 | 1/1 | LCR |
Water suppliers serving Jefferson
| Supplier | Population served |
|---|---|
| ASHTABULA COUNTY WATER SYSTEM | 14,757 |
Frequently asked questions about Jefferson tap water
Is Jefferson tap water safe to drink?
EPA testing detected 14 contaminants in the water serving Jefferson. 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 Jefferson?
1 public water supplier report drinking-water monitoring for Jefferson, Ohio to the EPA. Each is listed above with its population served.
What contaminants are in Jefferson's water?
The contaminants EPA monitoring detected in Jefferson include Copper, TTHM, Chloroform, Total Haloacetic Acids (HAA5), Trichloroacetic Acid. 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.