What was found in Seneca'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 |
|---|---|---|---|
| Nitrate | 3750 µg/L 38% of the EPA limit 10000 µg/L Main supplier: SENECA SANITARY DIST NO 1 · 250 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 3680.5 µg/L 37% of the EPA limit 10000 µg/L Main supplier: SENECA SANITARY DIST NO 1 · 250 people · 2017 | 1/1 | SYR4 |
| Copper | 218.4 µg/L 17% of the EPA limit 1300 µg/L Main supplier: SENECA SANITARY DIST NO 1 · 250 people · 2017 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 93.5413 µg/L 156% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: SENECA SANITARY DIST NO 1 · 250 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 92.6075 µg/L No EPA limit set Main supplier: SENECA SANITARY DIST NO 1 · 250 people · 2019 | 1/1 | SYR4 |
| Fluoride | 80 µg/L 2% of the EPA limit 4000 µg/L Main supplier: SENECA SANITARY DIST NO 1 · 250 people · 2017 | 1/1 | SYR4 |
| Barium | 58.7 µg/L 2.9% of the EPA limit 2000 µg/L Main supplier: SENECA SANITARY DIST NO 1 · 250 people · 2017 | 1/1 | SYR4 |
| TTHM | 7.7065 µg/L 9.6% of the EPA limit 80 µg/L Main supplier: SENECA SANITARY DIST NO 1 · 250 people · 2019 | 1/1 | SYR4 |
| Lead | 3.459 µg/L 23% of the EPA limit 15 µg/L Main supplier: SENECA SANITARY DIST NO 1 · 250 people · 2017 | 1/1 | SYR4 |
| Dibromochloromethane | 3.3095 µg/L No EPA limit set Main supplier: SENECA SANITARY DIST NO 1 · 250 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 2.58 µg/L No EPA limit set Main supplier: SENECA SANITARY DIST NO 1 · 250 people · 2019 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 2.12 pCi/L 42% of the EPA limit 5 pCi/L Main supplier: SENECA SANITARY DIST NO 1 · 250 people · 2014 | 1/1 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.6 pCi/L 11% of the EPA limit 15 pCi/L Main supplier: SENECA SANITARY DIST NO 1 · 250 people · 2014 | 1/1 | SYR4 |
| Chloroform | 1.5475 µg/L No EPA limit set Main supplier: SENECA SANITARY DIST NO 1 · 250 people · 2019 | 1/1 | SYR4 |
| Bromoform | 1.5315 µg/L No EPA limit set Main supplier: SENECA SANITARY DIST NO 1 · 250 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 0.9500 µg/L No EPA limit set Main supplier: SENECA SANITARY DIST NO 1 · 250 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 0.8450 µg/L No EPA limit set Main supplier: SENECA SANITARY DIST NO 1 · 250 people · 2019 | 1/1 | SYR4 |
| Lead | 0.0013 mg/L 8.8% of the EPA limit 0.0150 mg/L Main supplier: SENECA SANITARY DIST NO 1 · 250 people · 2023 | 1/1 | LCR |
Water suppliers serving Seneca
| Supplier | Population served |
|---|---|
| SENECA SANITARY DIST NO 1 | 250 |
Frequently asked questions about Seneca tap water
Is Seneca tap water safe to drink?
EPA testing detected 18 contaminants in the water serving Seneca. 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 Seneca?
1 public water supplier report drinking-water monitoring for Seneca, Wisconsin to the EPA. Each is listed above with its population served.
What contaminants are in Seneca's water?
The contaminants EPA monitoring detected in Seneca include Nitrate, Nitrate-Nitrite, Copper, Total Haloacetic Acids (HAA5), Monochloroacetic 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.