What was found in Platteville'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 |
|---|---|---|---|
| Nitrate-Nitrite | 371.1 µg/L 3.7% of the EPA limit 10000 µg/L Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2017
Highest in the city: 1583 µg/L — OAK PARK COMMUNITY · 90 people · 2019 | 3/3 | SYR4 |
| Nitrate | 350 µg/L 3.5% of the EPA limit 10000 µg/L Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2019
Highest in the city: 1200 µg/L — OAK PARK COMMUNITY · 90 people · 2018 | 3/3 | SYR4 |
| Fluoride | 840 µg/L 21% of the EPA limit 4000 µg/L Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2019 | 2/3 | SYR4 |
| Barium | 63.92 µg/L 3.2% of the EPA limit 2000 µg/L Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2019
Highest in the city: 189.49 µg/L — PATRIOT PARK · 80 people · 2018 | 3/3 | SYR4 |
| Copper | 173.3 µg/L 13% of the EPA limit 1300 µg/L Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2017 | 3/3 | SYR4 |
| Nitrite | 24 µg/L 2.4% of the EPA limit 1000 µg/L Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2017 | 1/3 | SYR4 |
| Lead | 16.6 µg/L 111% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2017 | 2/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 8.0912 pCi/L 54% of the EPA limit 15 pCi/L Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2019 | 3/3 | SYR4 |
| Combined Radium (-226 And -228) | 3.676 pCi/L 74% of the EPA limit 5 pCi/L Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2019 | 3/3 | SYR4 |
| TTHM | 3.4905 µg/L 4.4% of the EPA limit 80 µg/L Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2019 | 1/3 | SYR4 |
| Gross Beta Particle Activity | 3.19 pCi/L No EPA limit set Highest in the city: OAK PARK COMMUNITY · 90 people · 2015 | 1/3 | SYR4 |
| Chloroform | 2.2185 µg/L No EPA limit set Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2019 | 1/3 | SYR4 |
| Toluene | 2.15 µg/L 0.2% of the EPA limit 1000 µg/L Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2019 | 1/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 2.11325 µg/L 3.5% of the EPA limit 60 µg/L Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2019 | 1/3 | SYR4 |
| Arsenic | 2 µg/L 20% of the EPA limit 10 µg/L Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2019 | 2/3 | SYR4 |
| Cadmium | 2 µg/L 40% of the EPA limit 5 µg/L Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2017 | 1/3 | SYR4 |
| Monochloroacetic Acid | 1.856 µg/L No EPA limit set Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2019 | 1/3 | SYR4 |
| Bromodichloromethane | 1.2515 µg/L No EPA limit set Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2019 | 1/3 | SYR4 |
| Combined Uranium | 1.1312 µg/L 3.8% of the EPA limit 30 µg/L Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2019 | 1/3 | SYR4 |
| Dichloroacetic Acid | 1.12 µg/L No EPA limit set Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2019 | 1/3 | SYR4 |
| Selenium | 1 µg/L 2% of the EPA limit 50 µg/L Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2017 | 1/3 | SYR4 |
| Dibromochloromethane | 0.8273 µg/L No EPA limit set Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2019 | 1/3 | SYR4 |
| Trichloroacetic Acid | 0.8046 µg/L No EPA limit set Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2019 | 1/3 | SYR4 |
| Antimony, Total | 0.4000 µg/L 6.7% of the EPA limit 6 µg/L Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2019 | 1/3 | SYR4 |
| Mercury | 0.2000 µg/L 10% of the EPA limit 2 µg/L Highest in the city: PATRIOT PARK · 80 people · 2018 | 1/3 | SYR4 |
| Lead | 0.0103 mg/L 69% of the EPA limit 0.0150 mg/L Main supplier: PLATTEVILLE WATERWORKS · 12,268 people · 2025 | 3/3 | 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 Platteville
| Supplier | Population served |
|---|---|
| PLATTEVILLE WATERWORKS | 12,268 |
| OAK PARK COMMUNITY | 90 |
| PATRIOT PARK | 80 |
Frequently asked questions about Platteville tap water
Is Platteville tap water safe to drink?
EPA testing detected 26 contaminants in the water serving Platteville. 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 Platteville?
3 public water suppliers report drinking-water monitoring for Platteville, Wisconsin to the EPA. Each is listed above with its population served.
What contaminants are in Platteville's water?
The contaminants EPA monitoring detected in Platteville include Nitrate-Nitrite, Nitrate, Fluoride, Barium, Copper. 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.