What was found in ZIP 51442
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 | 46.61999999999996 µg/L 3.6% of the EPA limit 1300 µg/L Main supplier: DENISON WATER SUPPLY · 9,381 people · 2019
Highest in the ZIP: 1479.9999999999998 µg/L — WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2017 | 2/2 | SYR4 |
| Nitrate | 1300 µg/L 13% of the EPA limit 10000 µg/L Main supplier: DENISON WATER SUPPLY · 9,381 people · 2019 | 1/2 | SYR4 |
| Fluoride | 800 µg/L 20% of the EPA limit 4000 µg/L Main supplier: DENISON WATER SUPPLY · 9,381 people · 2013 | 2/2 | SYR4 |
| Barium | 27.2 µg/L 1.4% of the EPA limit 2000 µg/L Main supplier: DENISON WATER SUPPLY · 9,381 people · 2013
Highest in the ZIP: 150 µg/L — WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2012 | 2/2 | SYR4 |
| TTHM | 53.825 µg/L 67% of the EPA limit 80 µg/L Main supplier: DENISON WATER SUPPLY · 9,381 people · 2019
Highest in the ZIP: 56.65 µg/L — WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019 | 2/2 | SYR4 |
| Chloroform | 34.4 µg/L No EPA limit set Main supplier: DENISON WATER SUPPLY · 9,381 people · 2019
Highest in the ZIP: 35.65 µg/L — WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 23.125 µg/L 39% of the EPA limit 60 µg/L Main supplier: DENISON WATER SUPPLY · 9,381 people · 2019
Highest in the ZIP: 35.25 µg/L — WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019 | 2/2 | SYR4 |
| Lithium | 14 µg/L No EPA limit set Main supplier: DENISON WATER SUPPLY · 9,381 people · 2025
Highest in the ZIP: 20 µg/L — WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2023 | 2/2 | UCMR-5 |
| Trichloroacetic Acid | 1.6675 µg/L No EPA limit set Main supplier: DENISON WATER SUPPLY · 9,381 people · 2019
Highest in the ZIP: 17.95 µg/L — WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 10.975 µg/L No EPA limit set Main supplier: DENISON WATER SUPPLY · 9,381 people · 2019
Highest in the ZIP: 16 µg/L — WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 7.46 µg/L No EPA limit set Main supplier: DENISON WATER SUPPLY · 9,381 people · 2019
Highest in the ZIP: 15.95 µg/L — WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 14.969999999999992 µg/L No EPA limit set Main supplier: DENISON WATER SUPPLY · 9,381 people · 2019 | 1/2 | SYR4 |
| Dibromochloromethane | 12.2 µg/L No EPA limit set Main supplier: DENISON WATER SUPPLY · 9,381 people · 2019 | 2/2 | SYR4 |
| Lead | 5.2 µg/L 35% of the EPA limit 15 µg/L Main supplier: DENISON WATER SUPPLY · 9,381 people · 2019 | 2/2 | SYR4 |
| Bromoform | 4.9175 µg/L No EPA limit set Main supplier: DENISON WATER SUPPLY · 9,381 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 4.805000000000001 µg/L No EPA limit set Main supplier: DENISON WATER SUPPLY · 9,381 people · 2019 | 2/2 | SYR4 |
| Lead | 0.0012 mg/L 8% of the EPA limit 0.0150 mg/L Main supplier: DENISON WATER SUPPLY · 9,381 people · 2025
Highest in the ZIP: 0.0017 mg/L — WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2023 | 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.
Water suppliers serving ZIP 51442
| Supplier | State | Population served |
|---|---|---|
| DENISON WATER SUPPLY | IA | 9,381 |
| WEST CENTRAL RWA-BOYER SYSTEM | IA | 1,715 |
Frequently asked questions about ZIP 51442 tap water
Is the tap water in ZIP 51442 safe to drink?
EPA testing detected 17 contaminants across the water suppliers serving ZIP 51442. 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 51442?
2 public water suppliers report EPA drinking-water monitoring for ZIP 51442. Each is listed above with its population served.
What contaminants are in ZIP 51442's water?
EPA monitoring detected Copper, Nitrate, Fluoride, Barium, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.