What was found in ZIP 51250
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 | 7710 µg/L 77% of the EPA limit 10000 µg/L Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019 | 2/3 | SYR4 |
| Fluoride | 700 µg/L 18% of the EPA limit 4000 µg/L Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2013
Highest in the ZIP: 1216 µg/L — RURAL WATER SYSTEM #1 · 3,428 people · 2019 | 3/3 | SYR4 |
| Copper | 433.5099999999976 µg/L 33% of the EPA limit 1300 µg/L Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019
Highest in the ZIP: 983.9999999999986 µg/L — RURAL WATER SYSTEM #1 · 3,428 people · 2019 | 3/3 | SYR4 |
| Barium | 120 µg/L 6% of the EPA limit 2000 µg/L Highest in the ZIP: SOUTHERN SIOUX COUNTY RURAL WATER · 5,420 people · 2012 | 2/3 | SYR4 |
| Lithium | 77 µg/L No EPA limit set Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2025
Highest in the ZIP: 82 µg/L — RURAL WATER SYSTEM #1 · 3,428 people · 2025 | 3/3 | UCMR-5 |
| TTHM | 47.3 µg/L 59% of the EPA limit 80 µg/L Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019
Highest in the ZIP: 53.8 µg/L — RURAL WATER SYSTEM #1 · 3,428 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 44.144999999999996 µg/L 74% of the EPA limit 60 µg/L Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019 | 3/3 | SYR4 |
| Combined Uranium | 30.98 µg/L 103% of the EPA limit, at the 95th percentile of samples — 30 µg/L Highest in the ZIP: RURAL WATER SYSTEM #1 · 3,428 people · 2018 | 1/3 | SYR4 |
| Chloroform | 30.239999999999995 µg/L No EPA limit set Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 23.679999999999996 µg/L No EPA limit set Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019 | 2/3 | SYR4 |
| Dibromochloromethane | 4.8625 µg/L No EPA limit set Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019
Highest in the ZIP: 19.4 µg/L — RURAL WATER SYSTEM #1 · 3,428 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 12.3 µg/L No EPA limit set Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019
Highest in the ZIP: 18.199999999999996 µg/L — RURAL WATER SYSTEM #1 · 3,428 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 12.545 µg/L No EPA limit set Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 12.469999999999999 µg/L No EPA limit set Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019 | 3/3 | SYR4 |
| Lead | 10.98999999999998 µg/L 73% of the EPA limit 15 µg/L Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019 | 3/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 7.1 pCi/L 47% of the EPA limit 15 pCi/L Highest in the ZIP: RURAL WATER SYSTEM #1 · 3,428 people · 2015 | 1/3 | SYR4 |
| Dibromoacetic Acid | 1.525 µg/L No EPA limit set Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019
Highest in the ZIP: 5.6 µg/L — RURAL WATER SYSTEM #1 · 3,428 people · 2019 | 3/3 | SYR4 |
| Bromoform | 5.204999999999999 µg/L No EPA limit set Highest in the ZIP: RURAL WATER SYSTEM #1 · 3,428 people · 2019 | 1/3 | SYR4 |
| Xylenes, Total | 4.739999999999999 µg/L 0% of the EPA limit 10000 µg/L Highest in the ZIP: RURAL WATER SYSTEM #1 · 3,428 people · 2019 | 1/3 | SYR4 |
| Arsenic | 2 µg/L 20% of the EPA limit 10 µg/L Highest in the ZIP: SOUTHERN SIOUX COUNTY RURAL WATER · 5,420 people · 2012 | 2/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.9849999999999999 pCi/L 40% of the EPA limit 5 pCi/L Highest in the ZIP: RURAL WATER SYSTEM #1 · 3,428 people · 2015 | 2/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.1 µg/L 18% of the EPA limit 6 µg/L Highest in the ZIP: RURAL WATER SYSTEM #1 · 3,428 people · 2019 | 1/3 | SYR4 |
| Ethylbenzene | 0.9000 µg/L 0.1% of the EPA limit 700 µg/L Highest in the ZIP: RURAL WATER SYSTEM #1 · 3,428 people · 2019 | 1/3 | SYR4 |
| Lead | 0.0044 mg/L 29% of the EPA limit 0.0150 mg/L Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2025 | 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 51250
| Supplier | State | Population served |
|---|---|---|
| SIOUX CENTER MUNICIPAL WATER DEPARTMENT | IA | 8,231 |
| SOUTHERN SIOUX COUNTY RURAL WATER | IA | 5,420 |
| RURAL WATER SYSTEM #1 | IA | 3,428 |
Frequently asked questions about ZIP 51250 tap water
Is the tap water in ZIP 51250 safe to drink?
EPA testing detected 24 contaminants across the water suppliers serving ZIP 51250. 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 51250?
3 public water suppliers report EPA drinking-water monitoring for ZIP 51250. Each is listed above with its population served.
What contaminants are in ZIP 51250's water?
EPA monitoring detected Nitrate, Fluoride, Copper, Barium, Lithium, and others across this ZIP's suppliers. The full list with levels and sources is above.