What was found in River Falls'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 | 380 µg/L 3.8% of the EPA limit 10000 µg/L Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2019
Highest in the city: 1400 µg/L — HILLTOP ESTATES MHP · 64 people · 2019 | 2/3 | SYR4 |
| Nitrate-Nitrite | 370 µg/L 3.7% of the EPA limit 10000 µg/L Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2019
Highest in the city: 1090 µg/L — HILLTOP ESTATES MHP · 64 people · 2018 | 2/3 | SYR4 |
| Fluoride | 910 µg/L 23% of the EPA limit 4000 µg/L Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2019 | 3/3 | SYR4 |
| Copper | 350.5 µg/L 27% of the EPA limit 1300 µg/L Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2017 | 2/3 | SYR4 |
| Barium | 12.25 µg/L 0.6% of the EPA limit 2000 µg/L Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2019 | 3/3 | SYR4 |
| Selenium | 9.94 µg/L 20% of the EPA limit 50 µg/L Highest in the city: HILLTOP ESTATES MHP · 64 people · 2018 | 1/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 5.2585 pCi/L 35% of the EPA limit 15 pCi/L Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2017
Highest in the city: 5.72 pCi/L — HILLTOP ESTATES MHP · 64 people · 2015 | 3/3 | SYR4 |
| TTHM | 4.77 µg/L 6% of the EPA limit 80 µg/L Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2019 | 1/3 | SYR4 |
| Xylenes, Total | 4.5 µg/L 0% of the EPA limit 10000 µg/L Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 3.967 pCi/L 79% of the EPA limit 5 pCi/L Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2017 | 2/3 | SYR4 |
| Chloroform | 2.825 µg/L No EPA limit set Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2019 | 1/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 2.03045 µg/L 3.4% of the EPA limit 60 µg/L Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2019 | 1/3 | SYR4 |
| Dichloroacetic Acid | 1.955 µg/L No EPA limit set Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2019 | 1/3 | SYR4 |
| Lead | 1.795 µg/L 12% of the EPA limit 15 µg/L Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2017 | 1/3 | SYR4 |
| Bromodichloromethane | 1.3 µg/L No EPA limit set Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2019 | 1/3 | SYR4 |
| Combined Uranium | 1.27 µg/L 4.2% of the EPA limit 30 µg/L Highest in the city: ROLLING HILLS MHP LLC · 90 people · 2018 | 1/3 | SYR4 |
| Arsenic | 1.1 µg/L 11% of the EPA limit 10 µg/L Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2019 | 1/3 | SYR4 |
| Ethylbenzene | 1.1 µg/L 0.2% of the EPA limit 700 µg/L Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2019 | 1/3 | SYR4 |
| Dibromochloromethane | 0.7210 µg/L No EPA limit set Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2019 | 1/3 | SYR4 |
| Thallium, Total | 0.5585 µg/L 28% of the EPA limit 2 µg/L Highest in the city: HILLTOP ESTATES MHP · 64 people · 2018 | 1/3 | SYR4 |
| Antimony, Total | 0.4185 µg/L 7% of the EPA limit 6 µg/L Highest in the city: HILLTOP ESTATES MHP · 64 people · 2018 | 1/3 | SYR4 |
| Cadmium | 0.4000 µg/L 8% of the EPA limit 5 µg/L Highest in the city: HILLTOP ESTATES MHP · 64 people · 2018 | 1/3 | SYR4 |
| Dibromoacetic Acid | 0.3350 µg/L No EPA limit set Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2019 | 1/3 | SYR4 |
| Trichloroacetic Acid | 0.2400 µg/L No EPA limit set Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2019 | 1/3 | SYR4 |
| Lead | 0.00088 mg/L 5.9% of the EPA limit 0.0150 mg/L Main supplier: RIVER FALLS WATERWORKS · 16,000 people · 2023 | 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 River Falls
| Supplier | Population served |
|---|---|
| RIVER FALLS WATERWORKS | 16,000 |
| ROLLING HILLS MHP LLC | 90 |
| HILLTOP ESTATES MHP | 64 |
Frequently asked questions about River Falls tap water
Is River Falls tap water safe to drink?
EPA testing detected 25 contaminants in the water serving River Falls. 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 River Falls?
3 public water suppliers report drinking-water monitoring for River Falls, Wisconsin to the EPA. Each is listed above with its population served.
What contaminants are in River Falls's water?
The contaminants EPA monitoring detected in River Falls include Nitrate, Nitrate-Nitrite, Fluoride, 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.