What was found in ZIP 54650
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-Nitrite | 8450 µg/L 85% of the EPA limit 10000 µg/L Main supplier: ONALASKA WATERWORKS · 18,000 people · 2017 | 2/2 | SYR4 |
| Nitrate | 6400 µg/L 64% of the EPA limit 10000 µg/L Main supplier: ONALASKA WATERWORKS · 18,000 people · 2019
Highest in the ZIP: 6651.5 µg/L — HOLMEN WATERWORKS · 10,147 people · 2019 | 2/2 | SYR4 |
| Copper | 1373 µg/L 106% of the EPA limit, at the 95th percentile of samples — 1300 µg/L Main supplier: ONALASKA WATERWORKS · 18,000 people · 2017 | 2/2 | SYR4 |
| Fluoride | 840.2 µg/L 21% of the EPA limit 4000 µg/L Main supplier: ONALASKA WATERWORKS · 18,000 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 112.921 µg/L 188% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: ONALASKA WATERWORKS · 18,000 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 109.775 µg/L No EPA limit set Main supplier: ONALASKA WATERWORKS · 18,000 people · 2019 | 2/2 | SYR4 |
| Barium | 97.68 µg/L 4.9% of the EPA limit 2000 µg/L Main supplier: ONALASKA WATERWORKS · 18,000 people · 2017 | 2/2 | SYR4 |
| TTHM | 11.3852 µg/L 14% of the EPA limit 80 µg/L Main supplier: ONALASKA WATERWORKS · 18,000 people · 2019 | 2/2 | SYR4 |
| Lead | 3.5015 µg/L 23% of the EPA limit 15 µg/L Main supplier: ONALASKA WATERWORKS · 18,000 people · 2017
Highest in the ZIP: 7.3755 µg/L — HOLMEN WATERWORKS · 10,147 people · 2017 | 2/2 | SYR4 |
| Tetrachloroethylene | 0.6831 µg/L 14% of the EPA limit 5 µg/L Main supplier: ONALASKA WATERWORKS · 18,000 people · 2019
Highest in the ZIP: 4.635 µg/L — HOLMEN WATERWORKS · 10,147 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 3.99 µg/L No EPA limit set Main supplier: ONALASKA WATERWORKS · 18,000 people · 2019 | 2/2 | SYR4 |
| Chloroform | 3.7495 µg/L No EPA limit set Main supplier: ONALASKA WATERWORKS · 18,000 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 3.251 µg/L No EPA limit set Main supplier: ONALASKA WATERWORKS · 18,000 people · 2019 | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 3.092 pCi/L 62% of the EPA limit 5 pCi/L Main supplier: ONALASKA WATERWORKS · 18,000 people · 2017
Highest in the ZIP: 3.0975 pCi/L — HOLMEN WATERWORKS · 10,147 people · 2017 | 2/2 | SYR4 |
| Dichloroacetic Acid | 2.974 µg/L No EPA limit set Main supplier: ONALASKA WATERWORKS · 18,000 people · 2019 | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 2.71 pCi/L 18% of the EPA limit 15 pCi/L Main supplier: ONALASKA WATERWORKS · 18,000 people · 2014 | 2/2 | SYR4 |
| Arsenic | 1 µg/L 10% of the EPA limit 10 µg/L Main supplier: ONALASKA WATERWORKS · 18,000 people · 2017
Highest in the ZIP: 1.95 µg/L — HOLMEN WATERWORKS · 10,147 people · 2017 | 2/2 | SYR4 |
| Trichloroacetic Acid | 1.5855 µg/L No EPA limit set Main supplier: ONALASKA WATERWORKS · 18,000 people · 2019 | 2/2 | SYR4 |
| Bromoform | 1.155 µg/L No EPA limit set Main supplier: ONALASKA WATERWORKS · 18,000 people · 2019
Highest in the ZIP: 1.19 µg/L — HOLMEN WATERWORKS · 10,147 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 1.042 µg/L No EPA limit set Main supplier: ONALASKA WATERWORKS · 18,000 people · 2019 | 2/2 | SYR4 |
| Selenium | 0.6000 µg/L 1.2% of the EPA limit 50 µg/L Main supplier: ONALASKA WATERWORKS · 18,000 people · 2017
Highest in the ZIP: 1 µg/L — HOLMEN WATERWORKS · 10,147 people · 2017 | 2/2 | SYR4 |
| Combined Uranium | 0.5000 µg/L 1.7% of the EPA limit 30 µg/L Main supplier: ONALASKA WATERWORKS · 18,000 people · 2017
Highest in the ZIP: 0.8665 µg/L — HOLMEN WATERWORKS · 10,147 people · 2017 | 2/2 | SYR4 |
| Thallium, Total | 0.5000 µg/L 25% of the EPA limit 2 µg/L Main supplier: ONALASKA WATERWORKS · 18,000 people · 2017 | 1/2 | SYR4 |
| Monobromoacetic Acid | 0.4990 µg/L No EPA limit set Main supplier: ONALASKA WATERWORKS · 18,000 people · 2019 | 1/2 | SYR4 |
| Mercury | 0.4000 µg/L 20% of the EPA limit 2 µg/L Main supplier: ONALASKA WATERWORKS · 18,000 people · 2017 | 1/2 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: ONALASKA WATERWORKS · 18,000 people · 2023
Highest in the ZIP: 0.0028 mg/L — HOLMEN WATERWORKS · 10,147 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 54650
| Supplier | State | Population served |
|---|---|---|
| ONALASKA WATERWORKS | WI | 18,000 |
| HOLMEN WATERWORKS | 10,147 |
Frequently asked questions about ZIP 54650 tap water
Is the tap water in ZIP 54650 safe to drink?
EPA testing detected 26 contaminants across the water suppliers serving ZIP 54650. 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 54650?
2 public water suppliers report EPA drinking-water monitoring for ZIP 54650. Each is listed above with its population served.
What contaminants are in ZIP 54650's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Copper, Fluoride, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.