What was found in Fond Du Lac'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 | 148.5 µg/L 1.5% of the EPA limit 10000 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019
Highest in the city: 1400 µg/L — COLONIAL GARDENS HOMES · 48 people · 2019 | 3/6 | SYR4 |
| Fluoride | 982.4 µg/L 25% of the EPA limit 4000 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2018 | 3/6 | SYR4 |
| Copper | 789.5 µg/L 61% of the EPA limit 1300 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 6/6 | SYR4 |
| Nitrate-Nitrite | 110 µg/L 1.1% of the EPA limit 10000 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2017
Highest in the city: 670 µg/L — COLONIAL GARDENS HOMES · 48 people · 2018 | 2/6 | SYR4 |
| Monochloroacetic Acid | 93 µg/L No EPA limit set Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 2/6 | SYR4 |
| Barium | 51.8 µg/L 2.6% of the EPA limit 2000 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2017
Highest in the city: 66 µg/L — COLONIAL GARDENS HOMES · 48 people · 2018 | 5/6 | SYR4 |
| TTHM | 46.761 µg/L 58% of the EPA limit 80 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019
Highest in the city: 54.42 µg/L — FOND DU LAC TN WATER UTILITY · 980 people · 2019 | 3/6 | SYR4 |
| Bromoform | 35.6 µg/L No EPA limit set Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 3/6 | SYR4 |
| Dibromochloromethane | 9.88 µg/L No EPA limit set Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019
Highest in the city: 17.88 µg/L — FOND DU LAC TN WATER UTILITY · 980 people · 2019 | 3/6 | SYR4 |
| Gross Alpha, Excl. Radon And U | 17.84 pCi/L 119% of the EPA limit, at the 95th percentile of samples — 15 pCi/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 4/6 | SYR4 |
| Bromodichloromethane | 2.99 µg/L No EPA limit set Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019
Highest in the city: 17.82 µg/L — FOND DU LAC TN WATER UTILITY · 980 people · 2019 | 4/6 | SYR4 |
| Lead | 15 µg/L 100% of the EPA limit 15 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019
Highest in the city: 16.69 µg/L — MARY HILL PARK SANITARY DIST · 65 people · 2017 | 5/6 | SYR4 |
| Gross Beta Particle Activity | 14.78 pCi/L No EPA limit set Highest in the city: MARY HILL PARK SANITARY DIST · 65 people · 2019 | 2/6 | SYR4 |
| Chloroform | 1.1845 µg/L No EPA limit set Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019
Highest in the city: 13.56 µg/L — FOND DU LAC TN WATER UTILITY · 980 people · 2019 | 3/6 | SYR4 |
| Combined Radium (-226 And -228) | 12.108 pCi/L 242% of the EPA limit, at the 95th percentile of samples — 5 pCi/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 5/6 | SYR4 |
| Total Haloacetic Acids (HAA5) | 8.832 µg/L 15% of the EPA limit 60 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019
Highest in the city: 9.516 µg/L — FOND DU LAC TN WATER UTILITY · 980 people · 2019 | 3/6 | SYR4 |
| Dibromoacetic Acid | 6.6 µg/L No EPA limit set Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 3/6 | SYR4 |
| Arsenic | 4.44 µg/L 44% of the EPA limit 10 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2018
Highest in the city: 5.24 µg/L — ASHWOOD GROVE EDGEWATER · 1,046 people · 2018 | 3/6 | SYR4 |
| Xylenes, Total | 3.2 µg/L 0% of the EPA limit 10000 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 1/6 | SYR4 |
| Dichloroacetic Acid | 0.7740 µg/L No EPA limit set Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019
Highest in the city: 3.04 µg/L — FOND DU LAC TN WATER UTILITY · 980 people · 2019 | 3/6 | SYR4 |
| Trichloroacetic Acid | 0.2750 µg/L No EPA limit set Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019
Highest in the city: 2.83 µg/L — FOND DU LAC TN WATER UTILITY · 980 people · 2019 | 3/6 | SYR4 |
| Cadmium | 2 µg/L 40% of the EPA limit 5 µg/L Highest in the city: MARY HILL PARK SANITARY DIST · 65 people · 2017 | 1/6 | SYR4 |
| Combined Uranium | 1.672 µg/L 5.6% of the EPA limit 30 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 3/6 | SYR4 |
| Monobromoacetic Acid | 1.53 µg/L No EPA limit set Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 3/6 | SYR4 |
| Antimony, Total | 1.3 µg/L 22% of the EPA limit 6 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2017 | 1/6 | SYR4 |
| Beryllium, Total | 0.9000 µg/L 23% of the EPA limit 4 µg/L Highest in the city: MARY HILL PARK SANITARY DIST · 65 people · 2017 | 1/6 | SYR4 |
| Toluene | 0.6800 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2019 | 1/6 | SYR4 |
| Lead | 0.0061 mg/L 41% of the EPA limit 0.0150 mg/L Main supplier: FOND DU LAC WATERWORKS · 44,678 people · 2025
Highest in the city: 0.0078 mg/L — MARY HILL PARK SANITARY DIST · 65 people · 2023 | 6/6 | 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 Fond Du Lac
| Supplier | Population served |
|---|---|
| FOND DU LAC WATERWORKS | 44,678 |
| ASHWOOD GROVE EDGEWATER | 1,046 |
| FOND DU LAC TN WATER UTILITY | 980 |
| WOODLAND PARK | 66 |
| MARY HILL PARK SANITARY DIST | 65 |
| COLONIAL GARDENS HOMES | 48 |
Frequently asked questions about Fond Du Lac tap water
Is Fond Du Lac tap water safe to drink?
EPA testing detected 28 contaminants in the water serving Fond Du Lac. 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 Fond Du Lac?
6 public water suppliers report drinking-water monitoring for Fond Du Lac, Wisconsin to the EPA. Each is listed above with its population served.
What contaminants are in Fond Du Lac's water?
The contaminants EPA monitoring detected in Fond Du Lac include Nitrate, Fluoride, Copper, Nitrate-Nitrite, Monochloroacetic Acid. 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.