What was found in ZIP 52657
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Copper | 137.5 µg/L 11% of the EPA limit 1300 µg/L Main supplier: RATHBUN REG WATER ASSN (FT MADISON) · 11,840 people · 2018 | 1/1 | SYR4 |
| TTHM | 55.75 µg/L 70% of the EPA limit 80 µg/L Main supplier: RATHBUN REG WATER ASSN (FT MADISON) · 11,840 people · 2019 | 1/1 | SYR4 |
| Chloroform | 46.15 µg/L No EPA limit set Main supplier: RATHBUN REG WATER ASSN (FT MADISON) · 11,840 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 21.75 µg/L 36% of the EPA limit 60 µg/L Main supplier: RATHBUN REG WATER ASSN (FT MADISON) · 11,840 people · 2019 | 1/1 | SYR4 |
| Lithium | 16 µg/L No EPA limit set Main supplier: RATHBUN REG WATER ASSN (FT MADISON) · 11,840 people · 2024 | 1/1 | UCMR-5 |
| Lead | 15.75 µg/L 105% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: RATHBUN REG WATER ASSN (FT MADISON) · 11,840 people · 2018 | 1/1 | SYR4 |
| Dichloroacetic Acid | 15 µg/L No EPA limit set Main supplier: RATHBUN REG WATER ASSN (FT MADISON) · 11,840 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 9.315 µg/L No EPA limit set Main supplier: RATHBUN REG WATER ASSN (FT MADISON) · 11,840 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 7.5 µg/L No EPA limit set Main supplier: RATHBUN REG WATER ASSN (FT MADISON) · 11,840 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 3.4 µg/L No EPA limit set Main supplier: RATHBUN REG WATER ASSN (FT MADISON) · 11,840 people · 2019 | 1/1 | SYR4 |
| Bromoform | 1.16 µg/L No EPA limit set Main supplier: RATHBUN REG WATER ASSN (FT MADISON) · 11,840 people · 2019 | 1/1 | SYR4 |
| Pfba | 0.0120 µg/L No EPA limit set Main supplier: RATHBUN REG WATER ASSN (FT MADISON) · 11,840 people · 2024 | 1/1 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: RATHBUN REG WATER ASSN (FT MADISON) · 11,840 people · 2024 | 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.
Water suppliers serving ZIP 52657
| Supplier | State | Population served |
|---|---|---|
| RATHBUN REG WATER ASSN (FT MADISON) | IA | 11,840 |
Frequently asked questions about ZIP 52657 tap water
Is the tap water in ZIP 52657 safe to drink?
EPA testing detected 13 contaminants across the water suppliers serving ZIP 52657. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 52657?
1 public water supplier report EPA drinking-water monitoring for ZIP 52657. Each is listed above with its population served.
What contaminants are in ZIP 52657's water?
EPA monitoring detected Copper, TTHM, Chloroform, Total Haloacetic Acids (HAA5), Lithium, and others across this ZIP's suppliers. The full list with levels and sources is above.