What was found in ZIP 57761
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 |
|---|---|---|---|
| Fluoride | 595 µg/L 15% of the EPA limit 4000 µg/L Highest in the ZIP: VIEWFIELD RURAL WATER SYSTEM · 220 people · 2015 | 2/4 | SYR4 |
| Copper | 249.75 µg/L 19% of the EPA limit 1300 µg/L Main supplier: NEW UNDERWOOD · 679 people · 2017 | 4/4 | SYR4 |
| Barium | 58.75 µg/L 2.9% of the EPA limit 2000 µg/L Highest in the ZIP: VIEWFIELD RURAL WATER SYSTEM · 220 people · 2015 | 2/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 48.875 pCi/L 326% of the EPA limit, at the 95th percentile of samples — 15 pCi/L Highest in the ZIP: VIEWFIELD RURAL WATER SYSTEM · 220 people · 2019 | 2/4 | SYR4 |
| TTHM | 3.89 µg/L 4.9% of the EPA limit 80 µg/L Main supplier: NEW UNDERWOOD · 679 people · 2019 | 2/4 | SYR4 |
| Lead | 3.15 µg/L 21% of the EPA limit 15 µg/L Main supplier: NEW UNDERWOOD · 679 people · 2017
Highest in the ZIP: 3.3 µg/L — COPPER OAKS I · 64 people · 2019 | 4/4 | SYR4 |
| Chromium | 1 µg/L 1% of the EPA limit 100 µg/L Highest in the ZIP: OAKS WATER USERS ASSOCIATION · 180 people · 2014 | 1/4 | SYR4 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: NEW UNDERWOOD · 679 people · 2023
Highest in the ZIP: 0.0050 mg/L — VIEWFIELD RURAL WATER SYSTEM · 220 people · 2025 | 4/4 | 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 57761
| Supplier | State | Population served |
|---|---|---|
| NEW UNDERWOOD | SD | 679 |
| VIEWFIELD RURAL WATER SYSTEM | SD | 220 |
| OAKS WATER USERS ASSOCIATION | SD | 180 |
| COPPER OAKS I | SD | 64 |
Frequently asked questions about ZIP 57761 tap water
Is the tap water in ZIP 57761 safe to drink?
EPA testing detected 8 contaminants across the water suppliers serving ZIP 57761. 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 57761?
4 public water suppliers report EPA drinking-water monitoring for ZIP 57761. Each is listed above with its population served.
What contaminants are in ZIP 57761's water?
EPA monitoring detected Fluoride, Copper, Barium, Gross Alpha, Excl. Radon And U, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.