What was found in ZIP 57263
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 | 6550 µg/L 66% of the EPA limit 10000 µg/L Highest in the ZIP: SOUTH SHORE · 189 people · 2019 | 1/3 | SYR4 |
| Copper | 970 µg/L 75% of the EPA limit 1300 µg/L Main supplier: GRANT-ROBERTS RURAL WATER SYSTEM · 5,050 people · 2019 | 3/3 | SYR4 |
| Fluoride | 400 µg/L 10% of the EPA limit 4000 µg/L Highest in the ZIP: MARVIN · 19 people · 2017 | 1/3 | SYR4 |
| Barium | 65.5 µg/L 3.3% of the EPA limit 2000 µg/L Main supplier: GRANT-ROBERTS RURAL WATER SYSTEM · 5,050 people · 2013 | 2/3 | SYR4 |
| Nitrite | 60 µg/L 6% of the EPA limit 1000 µg/L Main supplier: GRANT-ROBERTS RURAL WATER SYSTEM · 5,050 people · 2017 | 1/3 | SYR4 |
| Lithium | 55.7 µg/L No EPA limit set Main supplier: GRANT-ROBERTS RURAL WATER SYSTEM · 5,050 people · 2023 | 1/3 | UCMR-5 |
| TTHM | 21.6895 µg/L 27% of the EPA limit 80 µg/L Main supplier: GRANT-ROBERTS RURAL WATER SYSTEM · 5,050 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 11.382 µg/L 19% of the EPA limit 60 µg/L Main supplier: GRANT-ROBERTS RURAL WATER SYSTEM · 5,050 people · 2019 | 3/3 | SYR4 |
| Arsenic | 4 µg/L 40% of the EPA limit 10 µg/L Main supplier: GRANT-ROBERTS RURAL WATER SYSTEM · 5,050 people · 2013
Highest in the ZIP: 9 µg/L — MARVIN · 19 people · 2017 | 2/3 | SYR4 |
| Lead | 8.785 µg/L 59% of the EPA limit 15 µg/L Main supplier: GRANT-ROBERTS RURAL WATER SYSTEM · 5,050 people · 2019 | 3/3 | SYR4 |
| Chromium | 8.2 µg/L 8.2% of the EPA limit 100 µg/L Main supplier: GRANT-ROBERTS RURAL WATER SYSTEM · 5,050 people · 2013 | 2/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.7 pCi/L 31% of the EPA limit 15 pCi/L Highest in the ZIP: SOUTH SHORE · 189 people · 2016 | 1/3 | SYR4 |
| Selenium | 0.9000 µg/L 1.8% of the EPA limit 50 µg/L Main supplier: GRANT-ROBERTS RURAL WATER SYSTEM · 5,050 people · 2013
Highest in the ZIP: 2.9 µg/L — MARVIN · 19 people · 2017 | 2/3 | SYR4 |
| Lead | 0.0030 mg/L 20% of the EPA limit 0.0150 mg/L Main supplier: GRANT-ROBERTS RURAL WATER SYSTEM · 5,050 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 57263
| Supplier | State | Population served |
|---|---|---|
| GRANT-ROBERTS RURAL WATER SYSTEM | SD | 5,050 |
| SOUTH SHORE | SD | 189 |
| MARVIN | SD | 19 |
Frequently asked questions about ZIP 57263 tap water
Is the tap water in ZIP 57263 safe to drink?
EPA testing detected 14 contaminants across the water suppliers serving ZIP 57263. 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 57263?
3 public water suppliers report EPA drinking-water monitoring for ZIP 57263. Each is listed above with its population served.
What contaminants are in ZIP 57263's water?
EPA monitoring detected Nitrate, Copper, Fluoride, Barium, Nitrite, and others across this ZIP's suppliers. The full list with levels and sources is above.