What was found in ZIP 50801
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 | 2255 µg/L 23% of the EPA limit 10000 µg/L Highest in the ZIP: CRESTON WATER SUPPLY · 7,536 people · 2019 | 1/2 | SYR4 |
| Copper | 1240 µg/L 95% of the EPA limit 1300 µg/L Main supplier: SIRWA #2 (CRESTON) · 20,793 people · 2018 | 2/2 | SYR4 |
| Fluoride | 784.5 µg/L 20% of the EPA limit 4000 µg/L Highest in the ZIP: CRESTON WATER SUPPLY · 7,536 people · 2019 | 1/2 | SYR4 |
| Chlorite | 753 µg/L 75% of the EPA limit 1000 µg/L Highest in the ZIP: CRESTON WATER SUPPLY · 7,536 people · 2019 | 1/2 | SYR4 |
| Barium | 128 µg/L 6.4% of the EPA limit 2000 µg/L Highest in the ZIP: CRESTON WATER SUPPLY · 7,536 people · 2019 | 1/2 | SYR4 |
| TTHM | 95.1 µg/L 119% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: SIRWA #2 (CRESTON) · 20,793 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 78.6 µg/L 131% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: SIRWA #2 (CRESTON) · 20,793 people · 2019 | 2/2 | SYR4 |
| Chloroform | 77.5 µg/L No EPA limit set Main supplier: SIRWA #2 (CRESTON) · 20,793 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 43.55 µg/L No EPA limit set Main supplier: SIRWA #2 (CRESTON) · 20,793 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 28.2 µg/L No EPA limit set Main supplier: SIRWA #2 (CRESTON) · 20,793 people · 2019 | 2/2 | SYR4 |
| Lead | 24.55 µg/L 164% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: SIRWA #2 (CRESTON) · 20,793 people · 2018 | 2/2 | SYR4 |
| Bromodichloromethane | 17 µg/L No EPA limit set Main supplier: SIRWA #2 (CRESTON) · 20,793 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 5.8 µg/L No EPA limit set Main supplier: SIRWA #2 (CRESTON) · 20,793 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 5 µg/L No EPA limit set Main supplier: SIRWA #2 (CRESTON) · 20,793 people · 2019 | 2/2 | SYR4 |
| Arsenic | 2 µg/L 20% of the EPA limit 10 µg/L Highest in the ZIP: CRESTON WATER SUPPLY · 7,536 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 2 µg/L No EPA limit set Main supplier: SIRWA #2 (CRESTON) · 20,793 people · 2019 | 2/2 | SYR4 |
| Xylenes, Total | 1.5 µg/L 0% of the EPA limit 10000 µg/L Highest in the ZIP: CRESTON WATER SUPPLY · 7,536 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 1 µg/L No EPA limit set Main supplier: SIRWA #2 (CRESTON) · 20,793 people · 2019 | 1/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.9850 µg/L 16% of the EPA limit 6 µg/L Highest in the ZIP: CRESTON WATER SUPPLY · 7,536 people · 2019 | 1/2 | SYR4 |
| Atrazine | 0.9000 µg/L 30% of the EPA limit 3 µg/L Highest in the ZIP: CRESTON WATER SUPPLY · 7,536 people · 2019 | 1/2 | SYR4 |
| Picloram | 0.8000 µg/L 0.2% of the EPA limit 500 µg/L Highest in the ZIP: CRESTON WATER SUPPLY · 7,536 people · 2019 | 1/2 | SYR4 |
| Bromoform | 0.7000 µg/L No EPA limit set Main supplier: SIRWA #2 (CRESTON) · 20,793 people · 2019 | 2/2 | SYR4 |
| Dalapon | 0.6700 µg/L 0.3% of the EPA limit 200 µg/L Highest in the ZIP: CRESTON WATER SUPPLY · 7,536 people · 2018 | 1/2 | SYR4 |
| P-Dichlorobenzene | 0.5000 µg/L 0.7% of the EPA limit 75 µg/L Highest in the ZIP: CRESTON WATER SUPPLY · 7,536 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0050 mg/L 33% of the EPA limit 0.0150 mg/L Main supplier: SIRWA #2 (CRESTON) · 20,793 people · 2024
Highest in the ZIP: 0.0070 mg/L — CRESTON WATER SUPPLY · 7,536 people · 2025 | 2/2 | LCR |
| Pfba | 0.0051 µg/L No EPA limit set Highest in the ZIP: CRESTON WATER SUPPLY · 7,536 people · 2023 | 1/2 | UCMR-5 |
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 50801
| Supplier | State | Population served |
|---|---|---|
| SIRWA #2 (CRESTON) | IA | 20,793 |
| CRESTON WATER SUPPLY | IA | 7,536 |
Frequently asked questions about ZIP 50801 tap water
Is the tap water in ZIP 50801 safe to drink?
EPA testing detected 26 contaminants across the water suppliers serving ZIP 50801. 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 50801?
2 public water suppliers report EPA drinking-water monitoring for ZIP 50801. Each is listed above with its population served.
What contaminants are in ZIP 50801's water?
EPA monitoring detected Nitrate, Copper, Fluoride, Chlorite, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.