What was found in Appleton'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 | 1600 µg/L 40% of the EPA limit 4000 µg/L Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2017 | 1/2 | SYR4 |
| Copper | 1200 µg/L 92% of the EPA limit 1300 µg/L Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2017 | 2/2 | SYR4 |
| Barium | 4.575 µg/L 0.2% of the EPA limit 2000 µg/L Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2017
Highest in the city: 285 µg/L — MAPLEWOOD VILLAGE · 225 people · 2018 | 2/2 | SYR4 |
| Nitrate | 280 µg/L 2.8% of the EPA limit 10000 µg/L Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2019 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 2.8625 µg/L 4.8% of the EPA limit 60 µg/L Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2019
Highest in the city: 15.85 µg/L — MAPLEWOOD VILLAGE · 225 people · 2018 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 15.2 pCi/L 101% of the EPA limit, at the 95th percentile of samples — 15 pCi/L Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2019 | 2/2 | SYR4 |
| TTHM | 9.665 µg/L 12% of the EPA limit 80 µg/L Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2019
Highest in the city: 10.928 µg/L — MAPLEWOOD VILLAGE · 225 people · 2018 | 2/2 | SYR4 |
| Monochloroacetic Acid | 9.65 µg/L No EPA limit set Highest in the city: MAPLEWOOD VILLAGE · 225 people · 2018 | 1/2 | SYR4 |
| Chloroform | 3.1 µg/L No EPA limit set Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2019
Highest in the city: 9.12 µg/L — MAPLEWOOD VILLAGE · 225 people · 2018 | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 7.7755 pCi/L 156% of the EPA limit, at the 95th percentile of samples — 5 pCi/L Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 3.49 µg/L No EPA limit set Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2019
Highest in the city: 5.855 µg/L — MAPLEWOOD VILLAGE · 225 people · 2018 | 2/2 | SYR4 |
| Xylenes, Total | 3.7 µg/L 0% of the EPA limit 10000 µg/L Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2019 | 1/2 | SYR4 |
| Arsenic | 1 µg/L 10% of the EPA limit 10 µg/L Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2017
Highest in the city: 3.3 µg/L — MAPLEWOOD VILLAGE · 225 people · 2018 | 2/2 | SYR4 |
| Dibromochloromethane | 2.785 µg/L No EPA limit set Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2019 | 2/2 | SYR4 |
| Lead | 0.5300 µg/L 3.5% of the EPA limit 15 µg/L Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2017
Highest in the city: 2.7 µg/L — MAPLEWOOD VILLAGE · 225 people · 2018 | 2/2 | SYR4 |
| Trichloroacetic Acid | 0.6545 µg/L No EPA limit set Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2019
Highest in the city: 2.67 µg/L — MAPLEWOOD VILLAGE · 225 people · 2018 | 2/2 | SYR4 |
| Dichloroacetic Acid | 1.74 µg/L No EPA limit set Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2019
Highest in the city: 2.32 µg/L — MAPLEWOOD VILLAGE · 225 people · 2018 | 2/2 | SYR4 |
| Dibromoacetic Acid | 0.8470 µg/L No EPA limit set Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2019
Highest in the city: 1.21 µg/L — MAPLEWOOD VILLAGE · 225 people · 2018 | 2/2 | SYR4 |
| Monobromoacetic Acid | 0.6420 µg/L No EPA limit set Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2019 | 1/2 | SYR4 |
| Bromoform | 0.5900 µg/L No EPA limit set Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2019 | 1/2 | SYR4 |
| Combined Uranium | 0.5166 µg/L 1.7% of the EPA limit 30 µg/L Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2019 | 1/2 | SYR4 |
| Lead | 0.00047 mg/L 3.1% of the EPA limit 0.0150 mg/L Main supplier: DARBOY SANITARY DIST 1 · 13,024 people · 2023
Highest in the city: 0.0048 mg/L — MAPLEWOOD VILLAGE · 225 people · 2024 | 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 Appleton
| Supplier | Population served |
|---|---|
| DARBOY SANITARY DIST 1 | 13,024 |
| MAPLEWOOD VILLAGE | 225 |
Frequently asked questions about Appleton tap water
Is Appleton tap water safe to drink?
EPA testing detected 22 contaminants in the water serving Appleton. 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 Appleton?
2 public water suppliers report drinking-water monitoring for Appleton, Wisconsin to the EPA. Each is listed above with its population served.
What contaminants are in Appleton's water?
The contaminants EPA monitoring detected in Appleton include Fluoride, Copper, Barium, Nitrate, Total Haloacetic Acids (HAA5). 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.