What was found in Shawano'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 | 6700 µg/L 67% of the EPA limit 10000 µg/L Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019 | 2/3 | SYR4 |
| Nitrate-Nitrite | 5860 µg/L 59% of the EPA limit 10000 µg/L Main supplier: SHAWANO WATERWORKS · 9,610 people · 2017 | 2/3 | SYR4 |
| Fluoride | 1242.5 µg/L 31% of the EPA limit 4000 µg/L Highest in the city: RICHMOND ESTATES · 150 people · 2018 | 2/3 | SYR4 |
| Copper | 210 µg/L 16% of the EPA limit 1300 µg/L Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019 | 3/3 | SYR4 |
| Barium | 67.75 µg/L 3.4% of the EPA limit 2000 µg/L Main supplier: SHAWANO WATERWORKS · 9,610 people · 2017 | 3/3 | SYR4 |
| Combined Uranium | 39.8 µg/L 133% of the EPA limit, at the 95th percentile of samples — 30 µg/L Highest in the city: RICHMOND ESTATES · 150 people · 2019 | 1/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 37.41 pCi/L 249% of the EPA limit, at the 95th percentile of samples — 15 pCi/L Highest in the city: RICHMOND ESTATES · 150 people · 2019 | 2/3 | SYR4 |
| Lead | 24.1 µg/L 161% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019 | 3/3 | SYR4 |
| Arsenic | 2 µg/L 20% of the EPA limit 10 µg/L Main supplier: SHAWANO WATERWORKS · 9,610 people · 2017
Highest in the city: 9.825 µg/L — SHAWANO LK SAN DIST 1 · 4,950 people · 2019 | 3/3 | SYR4 |
| TTHM | 9.064 µg/L 11% of the EPA limit 80 µg/L Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019
Highest in the city: 9.31 µg/L — SHAWANO LK SAN DIST 1 · 4,950 people · 2019 | 2/3 | SYR4 |
| Chloroform | 4.96 µg/L No EPA limit set Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019
Highest in the city: 6.84 µg/L — SHAWANO LK SAN DIST 1 · 4,950 people · 2019 | 2/3 | SYR4 |
| Bromodichloromethane | 4.02 µg/L No EPA limit set Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019 | 2/3 | SYR4 |
| Combined Radium (-226 And -228) | 2.1715 pCi/L 43% of the EPA limit 5 pCi/L Main supplier: SHAWANO WATERWORKS · 9,610 people · 2014
Highest in the city: 3.2974 pCi/L — SHAWANO LK SAN DIST 1 · 4,950 people · 2017 | 3/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 3 µg/L 50% of the EPA limit 6 µg/L Highest in the city: RICHMOND ESTATES · 150 people · 2018 | 1/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 2.576 µg/L 4.3% of the EPA limit 60 µg/L Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019 | 2/3 | SYR4 |
| Dibromochloromethane | 2.04 µg/L No EPA limit set Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019
Highest in the city: 2.14 µg/L — SHAWANO LK SAN DIST 1 · 4,950 people · 2019 | 2/3 | SYR4 |
| Chromium | 1.185 µg/L 1.2% of the EPA limit 100 µg/L Main supplier: SHAWANO WATERWORKS · 9,610 people · 2017 | 1/3 | SYR4 |
| Trichloroacetic Acid | 0.8700 µg/L No EPA limit set Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019
Highest in the city: 1.02 µg/L — SHAWANO LK SAN DIST 1 · 4,950 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 0.9510 µg/L No EPA limit set Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019 | 2/3 | SYR4 |
| Dibromoacetic Acid | 0.7470 µg/L No EPA limit set Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019 | 2/3 | SYR4 |
| Bromoform | 0.5500 µg/L No EPA limit set Highest in the city: SHAWANO LK SAN DIST 1 · 4,950 people · 2019 | 1/3 | SYR4 |
| Monobromoacetic Acid | 0.3970 µg/L No EPA limit set Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019 | 1/3 | SYR4 |
| Lead | 0.0037 mg/L 25% of the EPA limit 0.0150 mg/L Main supplier: SHAWANO WATERWORKS · 9,610 people · 2023 | 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 Shawano
| Supplier | Population served |
|---|---|
| SHAWANO WATERWORKS | 9,610 |
| SHAWANO LK SAN DIST 1 | 4,950 |
| RICHMOND ESTATES | 150 |
Frequently asked questions about Shawano tap water
Is Shawano tap water safe to drink?
EPA testing detected 23 contaminants in the water serving Shawano. 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 Shawano?
3 public water suppliers report drinking-water monitoring for Shawano, Wisconsin to the EPA. Each is listed above with its population served.
What contaminants are in Shawano's water?
The contaminants EPA monitoring detected in Shawano include Nitrate, Nitrate-Nitrite, Fluoride, Copper, 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.