What was found in ZIP 57770
The highest level seen across the suppliers serving this ZIP, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 1930 µg/L 19% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| Nitrate-Nitrite | 1800 µg/L 18% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| Fluoride | 1300 µg/L 33% of the EPA limit 4000 µg/L | 1/1 | SYR4 |
| Copper | 311 µg/L 24% of the EPA limit 1300 µg/L | 1/1 | SYR4 |
| Barium | 81 µg/L 4.1% of the EPA limit 2000 µg/L | 1/1 | SYR4 |
| Lithium | 54.9 µg/L No EPA limit set | 1/1 | UCMR-5 |
| Combined Uranium | 34.9 µg/L 116% of the EPA limit, in the worst sample — 30 µg/L | 1/1 | SYR4 |
| Selenium | 21 µg/L 42% of the EPA limit 50 µg/L | 1/1 | SYR4 |
| Gross Alpha, Excl. Radon And U | 16.5 pCi/L 110% of the EPA limit, in the worst sample — 15 pCi/L | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 15 µg/L 25% of the EPA limit 60 µg/L | 1/1 | SYR4 |
| Lead | 14 µg/L 93% of the EPA limit 15 µg/L | 1/1 | SYR4 |
| Arsenic | 6 µg/L 60% of the EPA limit 10 µg/L | 1/1 | SYR4 |
| Chromium | 6 µg/L 6% of the EPA limit 100 µg/L | 1/1 | SYR4 |
| TTHM | 4.98 µg/L 6.2% of the EPA limit 80 µg/L | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 2.3 pCi/L 46% of the EPA limit 5 pCi/L | 1/1 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 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 single worst sample on
record — over 100% is worth reading, but is not by itself a violation.
Formal violations are listed separately.
Water suppliers serving ZIP 57770
| Supplier | State | Population served |
|---|---|---|
| PINE RIDGE WATER SYSTEM | SD | 7,482 |
Frequently asked questions about ZIP 57770 tap water
Is the tap water in ZIP 57770 safe to drink?
EPA testing detected 16 contaminants across the water suppliers serving ZIP 57770. 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 57770?
1 public water supplier report EPA drinking-water monitoring for ZIP 57770. Each is listed above with its population served.
What contaminants are in ZIP 57770's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.