What was found in ZIP 54937
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 |
|---|---|---|---|
| Fluoride | 982.4 µg/L 25% of the EPA limit 4000 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2018
Highest in the ZIP: 1560 µg/L — NORTH FOND DU LAC WATERWORKS · 5,414 people · 2019 | 2/2 | SYR4 |
| Copper | 789.5 µg/L 61% of the EPA limit 1300 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 2/2 | SYR4 |
| Nitrate | 148.5 µg/L 1.5% of the EPA limit 10000 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 1/2 | SYR4 |
| Nitrate-Nitrite | 110 µg/L 1.1% of the EPA limit 10000 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2017 | 1/2 | SYR4 |
| Monochloroacetic Acid | 93 µg/L No EPA limit set Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 2/2 | SYR4 |
| TTHM | 46.761 µg/L 58% of the EPA limit 80 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019
Highest in the ZIP: 57.58 µg/L — NORTH FOND DU LAC WATERWORKS · 5,414 people · 2019 | 2/2 | SYR4 |
| Barium | 51.8 µg/L 2.6% of the EPA limit 2000 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2017 | 2/2 | SYR4 |
| Bromoform | 35.6 µg/L No EPA limit set Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 2.99 µg/L No EPA limit set Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019
Highest in the ZIP: 19.6 µg/L — NORTH FOND DU LAC WATERWORKS · 5,414 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 9.88 µg/L No EPA limit set Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019
Highest in the ZIP: 19 µg/L — NORTH FOND DU LAC WATERWORKS · 5,414 people · 2019 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 17.84 pCi/L 119% of the EPA limit, at the 95th percentile of samples — 15 pCi/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 2/2 | SYR4 |
| Chloroform | 1.1845 µg/L No EPA limit set Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019
Highest in the ZIP: 17 µg/L — NORTH FOND DU LAC WATERWORKS · 5,414 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 8.832 µg/L 15% of the EPA limit 60 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019
Highest in the ZIP: 15.02 µg/L — NORTH FOND DU LAC WATERWORKS · 5,414 people · 2019 | 2/2 | SYR4 |
| Lead | 15 µg/L 100% of the EPA limit 15 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 12.108 pCi/L 242% of the EPA limit, at the 95th percentile of samples — 5 pCi/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 6.6 µg/L No EPA limit set Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 0.7740 µg/L No EPA limit set Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019
Highest in the ZIP: 6.39 µg/L — NORTH FOND DU LAC WATERWORKS · 5,414 people · 2019 | 2/2 | SYR4 |
| Arsenic | 4.44 µg/L 44% of the EPA limit 10 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2018 | 2/2 | SYR4 |
| Trichloroacetic Acid | 0.2750 µg/L No EPA limit set Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019
Highest in the ZIP: 3.87 µg/L — NORTH FOND DU LAC WATERWORKS · 5,414 people · 2019 | 2/2 | SYR4 |
| Xylenes, Total | 3.2 µg/L 0% of the EPA limit 10000 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 1/2 | SYR4 |
| Combined Uranium | 1.672 µg/L 5.6% of the EPA limit 30 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 1.53 µg/L No EPA limit set Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 2/2 | SYR4 |
| Antimony, Total | 1.3 µg/L 22% of the EPA limit 6 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2017 | 1/2 | SYR4 |
| Toluene | 0.6800 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0061 mg/L 41% of the EPA limit 0.0150 mg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2025
Highest in the ZIP: 0.0091 mg/L — NORTH FOND DU LAC WATERWORKS · 5,414 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 54937
| Supplier | State | Population served |
|---|---|---|
| FOND DU LAC WATERWORKS | 44,678 | |
| NORTH FOND DU LAC WATERWORKS | WI | 5,414 |
Frequently asked questions about ZIP 54937 tap water
Is the tap water in ZIP 54937 safe to drink?
EPA testing detected 25 contaminants across the water suppliers serving ZIP 54937. 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 54937?
2 public water suppliers report EPA drinking-water monitoring for ZIP 54937. Each is listed above with its population served.
What contaminants are in ZIP 54937's water?
EPA monitoring detected Fluoride, Copper, Nitrate, Nitrate-Nitrite, Monochloroacetic Acid, and others across this ZIP's suppliers. The full list with levels and sources is above.