What was found in ZIP 54166
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the 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 | 2/2 | SYR4 |
| Nitrate-Nitrite | 5860 µg/L 59% of the EPA limit 10000 µg/L Main supplier: SHAWANO WATERWORKS · 9,610 people · 2017 | 2/2 | SYR4 |
| Fluoride | 967.5 µg/L 24% of the EPA limit 4000 µg/L Highest in the ZIP: SHAWANO LK SAN DIST 1 · 4,950 people · 2017 | 1/2 | SYR4 |
| Copper | 210 µg/L 16% of the EPA limit 1300 µg/L Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019 | 2/2 | SYR4 |
| Barium | 67.75 µg/L 3.4% of the EPA limit 2000 µg/L Main supplier: SHAWANO WATERWORKS · 9,610 people · 2017 | 2/2 | 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 | 2/2 | SYR4 |
| Arsenic | 2 µg/L 20% of the EPA limit 10 µg/L Main supplier: SHAWANO WATERWORKS · 9,610 people · 2017
Highest in the ZIP: 9.825 µg/L — SHAWANO LK SAN DIST 1 · 4,950 people · 2019 | 2/2 | 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 ZIP: 9.31 µg/L — SHAWANO LK SAN DIST 1 · 4,950 people · 2019 | 2/2 | SYR4 |
| Chloroform | 4.96 µg/L No EPA limit set Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019
Highest in the ZIP: 6.84 µg/L — SHAWANO LK SAN DIST 1 · 4,950 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 4.02 µg/L No EPA limit set Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.49 pCi/L 23% of the EPA limit 15 pCi/L Highest in the ZIP: SHAWANO LK SAN DIST 1 · 4,950 people · 2014 | 1/2 | 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 ZIP: 3.2974 pCi/L — SHAWANO LK SAN DIST 1 · 4,950 people · 2017 | 2/2 | 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 | 2/2 | SYR4 |
| Dibromochloromethane | 2.04 µg/L No EPA limit set Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019
Highest in the ZIP: 2.14 µg/L — SHAWANO LK SAN DIST 1 · 4,950 people · 2019 | 2/2 | SYR4 |
| Chromium | 1.185 µg/L 1.2% of the EPA limit 100 µg/L Main supplier: SHAWANO WATERWORKS · 9,610 people · 2017 | 1/2 | SYR4 |
| Trichloroacetic Acid | 0.8700 µg/L No EPA limit set Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019
Highest in the ZIP: 1.02 µg/L — SHAWANO LK SAN DIST 1 · 4,950 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 0.9510 µg/L No EPA limit set Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 0.7470 µg/L No EPA limit set Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019 | 2/2 | SYR4 |
| Bromoform | 0.5500 µg/L No EPA limit set Highest in the ZIP: SHAWANO LK SAN DIST 1 · 4,950 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 0.3970 µg/L No EPA limit set Main supplier: SHAWANO WATERWORKS · 9,610 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0037 mg/L 25% of the EPA limit 0.0150 mg/L Main supplier: SHAWANO WATERWORKS · 9,610 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.
Water suppliers serving ZIP 54166
| Supplier | State | Population served |
|---|---|---|
| SHAWANO WATERWORKS | WI | 9,610 |
| SHAWANO LK SAN DIST 1 | WI | 4,950 |
Frequently asked questions about ZIP 54166 tap water
Is the tap water in ZIP 54166 safe to drink?
EPA testing detected 21 contaminants across the water suppliers serving ZIP 54166. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 54166?
2 public water suppliers report EPA drinking-water monitoring for ZIP 54166. Each is listed above with its population served.
What contaminants are in ZIP 54166's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.