What was found in ZIP 57235
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 | 500 µg/L 5% of the EPA limit 10000 µg/L Main supplier: CLARK RURAL WATER SYSTEM · 2,325 people · 2019
Highest in the ZIP: 8800 µg/L — CLARK RURAL WATER-KAMPESKA · 602 people · 2019 | 2/3 | SYR4 |
| Copper | 293 µg/L 23% of the EPA limit 1300 µg/L Main supplier: CLARK RURAL WATER SYSTEM · 2,325 people · 2019
Highest in the ZIP: 1107.5 µg/L — CLARK RURAL WATER-KAMPESKA · 602 people · 2019 | 3/3 | SYR4 |
| Barium | 8.6 µg/L 0.4% of the EPA limit 2000 µg/L Main supplier: CLARK RURAL WATER SYSTEM · 2,325 people · 2013
Highest in the ZIP: 85.7 µg/L — CLARK RURAL WATER-KAMPESKA · 602 people · 2013 | 2/3 | SYR4 |
| TTHM | 41.925 µg/L 52% of the EPA limit 80 µg/L Main supplier: CLARK RURAL WATER SYSTEM · 2,325 people · 2019
Highest in the ZIP: 68 µg/L — CLARK RURAL WATER-KAMPESKA · 602 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 14.35 µg/L 24% of the EPA limit 60 µg/L Main supplier: CLARK RURAL WATER SYSTEM · 2,325 people · 2019
Highest in the ZIP: 22.62 µg/L — CLARK RURAL WATER-KAMPESKA · 602 people · 2019 | 3/3 | SYR4 |
| Lead | 2.365 µg/L 16% of the EPA limit 15 µg/L Main supplier: CLARK RURAL WATER SYSTEM · 2,325 people · 2019
Highest in the ZIP: 8.285 µg/L — CLARK RURAL WATER-KAMPESKA · 602 people · 2019 | 3/3 | SYR4 |
| Arsenic | 2 µg/L 20% of the EPA limit 10 µg/L Main supplier: CLARK RURAL WATER SYSTEM · 2,325 people · 2013 | 2/3 | SYR4 |
| Selenium | 0.7000 µg/L 1.4% of the EPA limit 50 µg/L Main supplier: CLARK RURAL WATER SYSTEM · 2,325 people · 2013
Highest in the ZIP: 1.8 µg/L — CLARK RURAL WATER-KAMPESKA · 602 people · 2013 | 2/3 | SYR4 |
| Chromium | 0.7000 µg/L 0.7% of the EPA limit 100 µg/L Main supplier: CLARK RURAL WATER SYSTEM · 2,325 people · 2013 | 2/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CLARK RURAL WATER SYSTEM · 2,325 people · 2025
Highest in the ZIP: 0.0040 mg/L — CLARK RURAL WATER-KAMPESKA · 602 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 57235
| Supplier | State | Population served |
|---|---|---|
| CLARK RURAL WATER SYSTEM | SD | 2,325 |
| CLARK RURAL WATER-KAMPESKA | SD | 602 |
| FLORENCE | SD | 337 |
Frequently asked questions about ZIP 57235 tap water
Is the tap water in ZIP 57235 safe to drink?
EPA testing detected 10 contaminants across the water suppliers serving ZIP 57235. 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 57235?
3 public water suppliers report EPA drinking-water monitoring for ZIP 57235. Each is listed above with its population served.
What contaminants are in ZIP 57235's water?
EPA monitoring detected Nitrate, Copper, Barium, TTHM, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.