What was found in Sheboygan'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 | 600 µg/L 6% of the EPA limit 10000 µg/L Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2019
Highest in the city: 2910 µg/L — SHEBOYGAN TN WATERWORKS · 4,596 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 565 µg/L 5.7% of the EPA limit 10000 µg/L Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2019
Highest in the city: 2073.5 µg/L — SHEBOYGAN TN WATERWORKS · 4,596 people · 2017 | 2/2 | SYR4 |
| Fluoride | 699.25 µg/L 17% of the EPA limit 4000 µg/L Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2019 | 2/2 | SYR4 |
| Copper | 61.2 µg/L 4.7% of the EPA limit 1300 µg/L Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2017
Highest in the city: 244.5 µg/L — SHEBOYGAN TN WATERWORKS · 4,596 people · 2017 | 2/2 | SYR4 |
| Barium | 20.3 µg/L 1% of the EPA limit 2000 µg/L Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2019
Highest in the city: 63.25 µg/L — SHEBOYGAN TN WATERWORKS · 4,596 people · 2017 | 2/2 | SYR4 |
| TTHM | 38.1 µg/L 48% of the EPA limit 80 µg/L Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2019 | 2/2 | SYR4 |
| Chloroform | 21 µg/L No EPA limit set Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 18.2 µg/L 30% of the EPA limit 60 µg/L Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 11.9 µg/L No EPA limit set Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 9.7 µg/L No EPA limit set Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 8.8 µg/L No EPA limit set Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2019 | 2/2 | SYR4 |
| Lead | 8.59 µg/L 57% of the EPA limit 15 µg/L Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2017 | 2/2 | SYR4 |
| Dibromochloromethane | 4.79 µg/L No EPA limit set Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2019
Highest in the city: 8.26 µg/L — SHEBOYGAN TN WATERWORKS · 4,596 people · 2019 | 2/2 | SYR4 |
| Arsenic | 0.5000 µg/L 5% of the EPA limit 10 µg/L Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2019
Highest in the city: 5.39 µg/L — SHEBOYGAN TN WATERWORKS · 4,596 people · 2017 | 2/2 | SYR4 |
| Bromoform | 0.5000 µg/L No EPA limit set Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2019
Highest in the city: 3.28 µg/L — SHEBOYGAN TN WATERWORKS · 4,596 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 1.19 µg/L No EPA limit set Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2019
Highest in the city: 2.32 µg/L — SHEBOYGAN TN WATERWORKS · 4,596 people · 2019 | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 2.0503 pCi/L 41% of the EPA limit 5 pCi/L Highest in the city: SHEBOYGAN TN WATERWORKS · 4,596 people · 2014 | 1/2 | SYR4 |
| Monobromoacetic Acid | 0.7070 µg/L No EPA limit set Highest in the city: SHEBOYGAN TN WATERWORKS · 4,596 people · 2019 | 1/2 | SYR4 |
| Selenium | 0.6000 µg/L 1.2% of the EPA limit 50 µg/L Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2019 | 1/2 | SYR4 |
| Chromium | 0.5985 µg/L 0.6% of the EPA limit 100 µg/L Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2019 | 1/2 | SYR4 |
| Dalapon | 0.3700 µg/L 0.2% of the EPA limit 200 µg/L Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2017 | 1/2 | SYR4 |
| Antimony, Total | 0.1970 µg/L 3.3% of the EPA limit 6 µg/L Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2019 | 1/2 | SYR4 |
| Atrazine | 0.0400 µg/L 1.3% of the EPA limit 3 µg/L Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2017 | 1/2 | SYR4 |
| Hexachlorocyclopentadiene | 0.0200 µg/L 0% of the EPA limit 50 µg/L Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2017 | 1/2 | SYR4 |
| Lead | 0.0022 mg/L 15% of the EPA limit 0.0150 mg/L Main supplier: SHEBOYGAN WATER UTILITIES · 49,931 people · 2023
Highest in the city: 0.0029 mg/L — SHEBOYGAN TN WATERWORKS · 4,596 people · 2023 | 2/2 | 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 Sheboygan
| Supplier | Population served |
|---|---|
| SHEBOYGAN WATER UTILITIES | 49,931 |
| SHEBOYGAN TN WATERWORKS | 4,596 |
Frequently asked questions about Sheboygan tap water
Is Sheboygan tap water safe to drink?
EPA testing detected 25 contaminants in the water serving Sheboygan. 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 Sheboygan?
2 public water suppliers report drinking-water monitoring for Sheboygan, Wisconsin to the EPA. Each is listed above with its population served.
What contaminants are in Sheboygan's water?
The contaminants EPA monitoring detected in Sheboygan 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.