What was found in Port Washington'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 |
|---|---|---|---|
| Fluoride | 1040 µg/L 26% of the EPA limit 4000 µg/L Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2019 | 2/2 | SYR4 |
| Nitrate | 600 µg/L 6% of the EPA limit 10000 µg/L Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 535 µg/L 5.4% of the EPA limit 10000 µg/L Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2018 | 1/2 | SYR4 |
| Copper | 194.5 µg/L 15% of the EPA limit 1300 µg/L Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2018 | 2/2 | SYR4 |
| Barium | 21 µg/L 1.1% of the EPA limit 2000 µg/L Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2019
Highest in the city: 61 µg/L — PW LAKE VIEW ESTATES LLC · 30 people · 2018 | 2/2 | SYR4 |
| TTHM | 33.48 µg/L 42% of the EPA limit 80 µg/L Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2019 | 1/2 | SYR4 |
| Nitrite | 29 µg/L 2.9% of the EPA limit 1000 µg/L Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2019 | 1/2 | SYR4 |
| Chloroform | 20 µg/L No EPA limit set Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2019 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 18.16 µg/L 30% of the EPA limit 60 µg/L Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 11.2 µg/L No EPA limit set Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2019 | 1/2 | SYR4 |
| Bromodichloromethane | 11 µg/L No EPA limit set Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2019 | 1/2 | SYR4 |
| Lead | 10 µg/L 67% of the EPA limit 15 µg/L Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2018 | 1/2 | SYR4 |
| Dichloroacetic Acid | 8.92 µg/L No EPA limit set Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2019 | 1/2 | SYR4 |
| Dibromochloromethane | 4.84 µg/L No EPA limit set Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2019 | 1/2 | SYR4 |
| Arsenic | 0.5900 µg/L 5.9% of the EPA limit 10 µg/L Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2019
Highest in the city: 2 µg/L — PW LAKE VIEW ESTATES LLC · 30 people · 2018 | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 1.12 pCi/L 22% of the EPA limit 5 pCi/L Highest in the city: PW LAKE VIEW ESTATES LLC · 30 people · 2015 | 1/2 | SYR4 |
| Dibromoacetic Acid | 1.1 µg/L No EPA limit set Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2019 | 1/2 | SYR4 |
| Monochloroacetic Acid | 1 µg/L No EPA limit set Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2019 | 1/2 | SYR4 |
| Chromium | 0.9640 µg/L 1% of the EPA limit 100 µg/L Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2019 | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 0.8200 pCi/L 5.5% of the EPA limit 15 pCi/L Highest in the city: PW LAKE VIEW ESTATES LLC · 30 people · 2015 | 1/2 | SYR4 |
| Bromoform | 0.5000 µg/L No EPA limit set Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2019 | 1/2 | SYR4 |
| Selenium | 0.5000 µg/L 1% of the EPA limit 50 µg/L Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2019 | 1/2 | SYR4 |
| P-Dichlorobenzene | 0.2000 µg/L 0.3% of the EPA limit 75 µg/L Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2017 | 1/2 | SYR4 |
| Antimony, Total | 0.1790 µg/L 3% of the EPA limit 6 µg/L Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2019 | 1/2 | SYR4 |
| Atrazine | 0.0300 µg/L 1% of the EPA limit 3 µg/L Main supplier: PORT WASHINGTON WATERWORKS · 12,853 people · 2017 | 1/2 | SYR4 |
| Lead | 0.0059 mg/L 39% of the EPA limit 0.0150 mg/L Main supplier: PORT WASHINGTON WATERWORKS · 12,853 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 Port Washington
| Supplier | Population served |
|---|---|
| PORT WASHINGTON WATERWORKS | 12,853 |
| PW LAKE VIEW ESTATES LLC | 30 |
Frequently asked questions about Port Washington tap water
Is Port Washington tap water safe to drink?
EPA testing detected 26 contaminants in the water serving Port Washington. 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 Port Washington?
2 public water suppliers report drinking-water monitoring for Port Washington, Wisconsin to the EPA. Each is listed above with its population served.
What contaminants are in Port Washington's water?
The contaminants EPA monitoring detected in Port Washington include Fluoride, Nitrate, Nitrate-Nitrite, 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.