What was found in Cedarburg'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 |
|---|---|---|---|
| Copper | 1700 µg/L 131% of the EPA limit, at the 95th percentile of samples — 1300 µg/L Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2017 | 1/1 | SYR4 |
| Nitrate | 1330 µg/L 13% of the EPA limit 10000 µg/L Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 1250 µg/L 13% of the EPA limit 10000 µg/L Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2017 | 1/1 | SYR4 |
| Fluoride | 1188.5 µg/L 30% of the EPA limit 4000 µg/L Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2019 | 1/1 | SYR4 |
| Barium | 140 µg/L 7% of the EPA limit 2000 µg/L Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2017 | 1/1 | SYR4 |
| TTHM | 18.05 µg/L 23% of the EPA limit 80 µg/L Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2019 | 1/1 | SYR4 |
| Trichloroethylene | 15.4 µg/L 308% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2019 | 1/1 | SYR4 |
| Lead | 14.2 µg/L 95% of the EPA limit 15 µg/L Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2017 | 1/1 | SYR4 |
| Dibromochloromethane | 6.195 µg/L No EPA limit set Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 4.37 µg/L No EPA limit set Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 3.943 µg/L 6.6% of the EPA limit 60 µg/L Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2019 | 1/1 | SYR4 |
| Bromoform | 3.6 µg/L No EPA limit set Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2019 | 1/1 | SYR4 |
| Chloroform | 3.58 µg/L No EPA limit set Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2019 | 1/1 | SYR4 |
| Arsenic | 3.3 µg/L 33% of the EPA limit 10 µg/L Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2017 | 1/1 | SYR4 |
| cis-1,2-Dichloroethylene | 2.945 µg/L 4.2% of the EPA limit 70 µg/L Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 2.42 µg/L No EPA limit set Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2019 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 1.7822 pCi/L 36% of the EPA limit 5 pCi/L Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2014 | 1/1 | SYR4 |
| Dichloroacetic Acid | 1.492 µg/L No EPA limit set Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2019 | 1/1 | SYR4 |
| trans-1,2-Dichloroethylene | 1.17 µg/L 1.2% of the EPA limit 100 µg/L Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2019 | 1/1 | SYR4 |
| Combined Uranium | 0.7480 µg/L 2.5% of the EPA limit 30 µg/L Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2017 | 1/1 | SYR4 |
| Vinyl Chloride | 0.7125 µg/L 36% of the EPA limit 2 µg/L Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 0.5770 µg/L No EPA limit set Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 0.2300 µg/L No EPA limit set Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2019 | 1/1 | SYR4 |
| Lead | 0.0076 mg/L 51% of the EPA limit 0.0150 mg/L Main supplier: CEDARBURG L & W COMMISSION · 12,500 people · 2023 | 1/1 | 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 Cedarburg
| Supplier | Population served |
|---|---|
| CEDARBURG L & W COMMISSION | 12,500 |
Frequently asked questions about Cedarburg tap water
Is Cedarburg tap water safe to drink?
EPA testing detected 24 contaminants in the water serving Cedarburg. 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 Cedarburg?
1 public water supplier report drinking-water monitoring for Cedarburg, Wisconsin to the EPA. Each is listed above with its population served.
What contaminants are in Cedarburg's water?
The contaminants EPA monitoring detected in Cedarburg include Copper, Nitrate, Nitrate-Nitrite, Fluoride, 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.