What was found in ZIP 57077
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 | 1450 µg/L 36% of the EPA limit 4000 µg/L Highest in the ZIP: SOUTH LINCOLN RURAL WATER SYSTEM · 5,250 people · 2019 | 1/3 | SYR4 |
| Copper | 198.49999999999966 µg/L 15% of the EPA limit 1300 µg/L Main supplier: LINCOLN COUNTY RURAL WATER SYSTEM · 5,965 people · 2018
Highest in the ZIP: 1004.9999999999998 µg/L — SOUTH LINCOLN RURAL WATER SYSTEM · 5,250 people · 2019 | 3/3 | SYR4 |
| Lithium | 55 µg/L No EPA limit set Main supplier: LINCOLN COUNTY RURAL WATER SYSTEM · 5,965 people · 2023
Highest in the ZIP: 105 µg/L — SOUTH LINCOLN RURAL WATER SYSTEM · 5,250 people · 2024 | 2/3 | UCMR-5 |
| TTHM | 33.11 µg/L 41% of the EPA limit 80 µg/L Main supplier: LINCOLN COUNTY RURAL WATER SYSTEM · 5,965 people · 2019 | 2/3 | SYR4 |
| Barium | 24.3 µg/L 1.2% of the EPA limit 2000 µg/L Highest in the ZIP: SOUTH LINCOLN RURAL WATER SYSTEM · 5,250 people · 2018 | 1/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 21.099999999999998 µg/L 35% of the EPA limit 60 µg/L Main supplier: LINCOLN COUNTY RURAL WATER SYSTEM · 5,965 people · 2019 | 3/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 7.4 pCi/L 49% of the EPA limit 15 pCi/L Highest in the ZIP: SOUTH LINCOLN RURAL WATER SYSTEM · 5,250 people · 2019 | 1/3 | SYR4 |
| Lead | 2.7 µg/L 18% of the EPA limit 15 µg/L Main supplier: LINCOLN COUNTY RURAL WATER SYSTEM · 5,965 people · 2018
Highest in the ZIP: 5.41 µg/L — SOUTH LINCOLN RURAL WATER SYSTEM · 5,250 people · 2019 | 3/3 | SYR4 |
| Pfba | 0.0061 µg/L No EPA limit set Main supplier: LINCOLN COUNTY RURAL WATER SYSTEM · 5,965 people · 2024 | 1/3 | UCMR-5 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: LINCOLN COUNTY RURAL WATER SYSTEM · 5,965 people · 2024 | 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 57077
| Supplier | State | Population served |
|---|---|---|
| LINCOLN COUNTY RURAL WATER SYSTEM | SD | 5,965 |
| SOUTH LINCOLN RURAL WATER SYSTEM | SD | 5,250 |
| WORTHING | SD | 939 |
Frequently asked questions about ZIP 57077 tap water
Is the tap water in ZIP 57077 safe to drink?
EPA testing detected 10 contaminants across the water suppliers serving ZIP 57077. 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 57077?
3 public water suppliers report EPA drinking-water monitoring for ZIP 57077. Each is listed above with its population served.
What contaminants are in ZIP 57077's water?
EPA monitoring detected Fluoride, Copper, Lithium, TTHM, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.