What was found in ZIP 54304
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 | 1765 µg/L 44% of the EPA limit 4000 µg/L Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2019 | 1/2 | SYR4 |
| Nitrate | 1162.5 µg/L 12% of the EPA limit 10000 µg/L Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2019 | 1/2 | SYR4 |
| Copper | 790 µg/L 61% of the EPA limit 1300 µg/L Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 309 µg/L 3.1% of the EPA limit 10000 µg/L Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2014 | 1/2 | SYR4 |
| TTHM | 39.663 µg/L 50% of the EPA limit 80 µg/L Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2019
Highest in the ZIP: 46.87 µg/L — ASHWAUBENON WATERWORKS · 17,730 people · 2019 | 2/2 | SYR4 |
| Barium | 46.35 µg/L 2.3% of the EPA limit 2000 µg/L Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2017 | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 27.745 pCi/L 185% of the EPA limit, at the 95th percentile of samples — 15 pCi/L Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2014 | 1/2 | SYR4 |
| Chloroform | 19.55 µg/L No EPA limit set Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2019
Highest in the ZIP: 25 µg/L — ASHWAUBENON WATERWORKS · 17,730 people · 2019 | 2/2 | SYR4 |
| Lead | 22 µg/L 147% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2019 | 2/2 | SYR4 |
| Arsenic | 18 µg/L 180% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2017 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 9.965 µg/L 17% of the EPA limit 60 µg/L Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2019
Highest in the ZIP: 16.698 µg/L — ASHWAUBENON WATERWORKS · 17,730 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 12.55 µg/L No EPA limit set Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2019
Highest in the ZIP: 15 µg/L — ASHWAUBENON WATERWORKS · 17,730 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 5.24 µg/L No EPA limit set Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2019
Highest in the ZIP: 9.24 µg/L — ASHWAUBENON WATERWORKS · 17,730 people · 2019 | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 9.0025 pCi/L 180% of the EPA limit, at the 95th percentile of samples — 5 pCi/L Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2014 | 1/2 | SYR4 |
| Dibromochloromethane | 6.7 µg/L No EPA limit set Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2019
Highest in the ZIP: 8.05 µg/L — ASHWAUBENON WATERWORKS · 17,730 people · 2019 | 2/2 | SYR4 |
| Bromate | 5.615 µg/L 56% of the EPA limit 10 µg/L Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 3.6 µg/L No EPA limit set Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2019
Highest in the ZIP: 4.91 µg/L — ASHWAUBENON WATERWORKS · 17,730 people · 2019 | 2/2 | SYR4 |
| Combined Uranium | 4.8 µg/L 16% of the EPA limit 30 µg/L Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2014 | 1/2 | SYR4 |
| Monochloroacetic Acid | 2.775 µg/L No EPA limit set Highest in the ZIP: ASHWAUBENON WATERWORKS · 17,730 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 1.4 µg/L No EPA limit set Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2019
Highest in the ZIP: 1.6 µg/L — ASHWAUBENON WATERWORKS · 17,730 people · 2019 | 2/2 | SYR4 |
| Bromoform | 1.2 µg/L No EPA limit set Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 0.8300 µg/L No EPA limit set Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2019
Highest in the ZIP: 0.9900 µg/L — ASHWAUBENON WATERWORKS · 17,730 people · 2019 | 2/2 | SYR4 |
| Lead | 0.0025 mg/L 17% of the EPA limit 0.0150 mg/L Main supplier: GREEN BAY WATERWORKS · 107,369 people · 2023
Highest in the ZIP: 0.0034 mg/L — ASHWAUBENON WATERWORKS · 17,730 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 54304
| Supplier | State | Population served |
|---|---|---|
| GREEN BAY WATERWORKS | WI | 107,369 |
| ASHWAUBENON WATERWORKS | WI | 17,730 |
Frequently asked questions about ZIP 54304 tap water
Is the tap water in ZIP 54304 safe to drink?
EPA testing detected 23 contaminants across the water suppliers serving ZIP 54304. 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 54304?
2 public water suppliers report EPA drinking-water monitoring for ZIP 54304. Each is listed above with its population served.
What contaminants are in ZIP 54304's water?
EPA monitoring detected Fluoride, Nitrate, Copper, Nitrate-Nitrite, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.