What was found in ZIP 51630
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 | 7100 µg/L 71% of the EPA limit 10000 µg/L Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2019 | 1/1 | SYR4 |
| Copper | 888.5999999999998 µg/L 68% of the EPA limit 1300 µg/L Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2019 | 1/1 | SYR4 |
| Fluoride | 749.5 µg/L 19% of the EPA limit 4000 µg/L Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2019 | 1/1 | SYR4 |
| Barium | 240.7 µg/L 12% of the EPA limit 2000 µg/L Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2015 | 1/1 | SYR4 |
| Lithium | 16 µg/L No EPA limit set Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2025 | 1/1 | UCMR-5 |
| Lead | 7.479999999999999 µg/L 50% of the EPA limit 15 µg/L Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2019 | 1/1 | SYR4 |
| TTHM | 5.807499999999999 µg/L 7.3% of the EPA limit 80 µg/L Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 5.762499999999999 µg/L 9.6% of the EPA limit 60 µg/L Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 3.676 µg/L No EPA limit set Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2019 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 3.1649999999999996 pCi/L 63% of the EPA limit 5 pCi/L Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2018 | 1/1 | SYR4 |
| Bromodichloromethane | 2.08 µg/L No EPA limit set Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2019 | 1/1 | SYR4 |
| Selenium | 2.0700000000000003 µg/L 4.1% of the EPA limit 50 µg/L Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2015 | 1/1 | SYR4 |
| Chloroform | 1.945 µg/L No EPA limit set Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 1.8375000000000001 µg/L No EPA limit set Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 1.738 µg/L No EPA limit set Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 1.38 µg/L No EPA limit set Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 0.8300 µg/L No EPA limit set Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2019 | 1/1 | SYR4 |
| Bromoform | 0.7500 µg/L No EPA limit set Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2019 | 1/1 | SYR4 |
| Atrazine | 0.3150 µg/L 11% of the EPA limit 3 µg/L Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2018 | 1/1 | SYR4 |
| Lead | 0.0027 mg/L 18% of the EPA limit 0.0150 mg/L Main supplier: RED OAK WATER SUPPLY · 5,596 people · 2025 | 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 51630
| Supplier | State | Population served |
|---|---|---|
| RED OAK WATER SUPPLY | IA | 5,596 |
Frequently asked questions about ZIP 51630 tap water
Is the tap water in ZIP 51630 safe to drink?
EPA testing detected 20 contaminants across the water suppliers serving ZIP 51630. 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 51630?
1 public water supplier report EPA drinking-water monitoring for ZIP 51630. Each is listed above with its population served.
What contaminants are in ZIP 51630's water?
EPA monitoring detected Nitrate, Copper, Fluoride, Barium, Lithium, and others across this ZIP's suppliers. The full list with levels and sources is above.