What was found in ZIP 51401
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 |
|---|---|---|---|
| Nitrate | 6300 µg/L 63% of the EPA limit 10000 µg/L Highest in the ZIP: WEST CENTRAL RWA - NISH SYSTEM · 3,573 people · 2019 | 1/3 | SYR4 |
| Copper | 793.35 µg/L 61% of the EPA limit 1300 µg/L Main supplier: CARROLL MUNICIPAL WATER SUPPLY · 10,184 people · 2017
Highest in the ZIP: 1480 µg/L — WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2017 | 3/3 | SYR4 |
| Fluoride | 1100 µg/L 28% of the EPA limit 4000 µg/L Main supplier: CARROLL MUNICIPAL WATER SUPPLY · 10,184 people · 2013 | 3/3 | SYR4 |
| Nitrite | 199 µg/L 20% of the EPA limit 1000 µg/L Main supplier: CARROLL MUNICIPAL WATER SUPPLY · 10,184 people · 2019 | 1/3 | SYR4 |
| Barium | 157 µg/L 7.9% of the EPA limit 2000 µg/L Main supplier: CARROLL MUNICIPAL WATER SUPPLY · 10,184 people · 2013 | 3/3 | SYR4 |
| TTHM | 56.65 µg/L 71% of the EPA limit 80 µg/L Highest in the ZIP: WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019 | 2/3 | SYR4 |
| Lithium | 53 µg/L No EPA limit set Main supplier: CARROLL MUNICIPAL WATER SUPPLY · 10,184 people · 2025 | 3/3 | UCMR-5 |
| Chloroform | 1.3775 µg/L No EPA limit set Main supplier: CARROLL MUNICIPAL WATER SUPPLY · 10,184 people · 2019
Highest in the ZIP: 35.65 µg/L — WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 8.391 µg/L 14% of the EPA limit 60 µg/L Main supplier: CARROLL MUNICIPAL WATER SUPPLY · 10,184 people · 2019
Highest in the ZIP: 35.25 µg/L — WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 0.8320 µg/L No EPA limit set Main supplier: CARROLL MUNICIPAL WATER SUPPLY · 10,184 people · 2019
Highest in the ZIP: 17.95 µg/L — WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 16 µg/L No EPA limit set Highest in the ZIP: WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 2.6645 µg/L No EPA limit set Main supplier: CARROLL MUNICIPAL WATER SUPPLY · 10,184 people · 2019
Highest in the ZIP: 15.95 µg/L — WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 13.8 µg/L No EPA limit set Highest in the ZIP: WEST CENTRAL RWA - NISH SYSTEM · 3,573 people · 2018 | 2/3 | SYR4 |
| Lead | 7.34 µg/L 49% of the EPA limit 15 µg/L Main supplier: CARROLL MUNICIPAL WATER SUPPLY · 10,184 people · 2017 | 3/3 | SYR4 |
| Bromoform | 5.86 µg/L No EPA limit set Highest in the ZIP: WEST CENTRAL RWA - NISH SYSTEM · 3,573 people · 2018 | 1/3 | SYR4 |
| Monochloroacetic Acid | 5.2715 µg/L No EPA limit set Main supplier: CARROLL MUNICIPAL WATER SUPPLY · 10,184 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 4 µg/L No EPA limit set Highest in the ZIP: WEST CENTRAL RWA - NISH SYSTEM · 3,573 people · 2018 | 2/3 | SYR4 |
| Arsenic | 1.79 µg/L 18% of the EPA limit 10 µg/L Main supplier: CARROLL MUNICIPAL WATER SUPPLY · 10,184 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.13 pCi/L 23% of the EPA limit 5 pCi/L Main supplier: CARROLL MUNICIPAL WATER SUPPLY · 10,184 people · 2018 | 1/3 | SYR4 |
| Lead | 0.0080 mg/L 53% of the EPA limit 0.0150 mg/L Main supplier: CARROLL MUNICIPAL WATER SUPPLY · 10,184 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.
Water suppliers serving ZIP 51401
| Supplier | State | Population served |
|---|---|---|
| CARROLL MUNICIPAL WATER SUPPLY | IA | 10,184 |
| WEST CENTRAL RWA - NISH SYSTEM | IA | 3,573 |
| WEST CENTRAL RWA-BOYER SYSTEM | IA | 1,715 |
Frequently asked questions about ZIP 51401 tap water
Is the tap water in ZIP 51401 safe to drink?
EPA testing detected 20 contaminants across the water suppliers serving ZIP 51401. 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 51401?
3 public water suppliers report EPA drinking-water monitoring for ZIP 51401. Each is listed above with its population served.
What contaminants are in ZIP 51401's water?
EPA monitoring detected Nitrate, Copper, Fluoride, Nitrite, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.