What was found in ZIP 57481
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 | 480 µg/L 12% of the EPA limit 4000 µg/L Main supplier: WEB WATER DEVELOPMENT ASSOCIATION · 20,750 people · 2019
Highest in the ZIP: 2600 µg/L — LONG LAKE COLONY · 100 people · 2019 | 2/3 | SYR4 |
| Copper | 1038 µg/L 80% of the EPA limit 1300 µg/L Main supplier: WEB WATER DEVELOPMENT ASSOCIATION · 20,750 people · 2019 | 3/3 | SYR4 |
| Nitrate | 400 µg/L 4% of the EPA limit 10000 µg/L Main supplier: WEB WATER DEVELOPMENT ASSOCIATION · 20,750 people · 2019 | 1/3 | SYR4 |
| Barium | 47.6 µg/L 2.4% of the EPA limit 2000 µg/L Main supplier: WEB WATER DEVELOPMENT ASSOCIATION · 20,750 people · 2013 | 2/3 | SYR4 |
| Lithium | 46 µg/L No EPA limit set Main supplier: WEB WATER DEVELOPMENT ASSOCIATION · 20,750 people · 2024 | 1/3 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 25.625 µg/L 43% of the EPA limit 60 µg/L Main supplier: WEB WATER DEVELOPMENT ASSOCIATION · 20,750 people · 2019 | 2/3 | SYR4 |
| TTHM | 15.484999999999996 µg/L 19% of the EPA limit 80 µg/L Main supplier: WEB WATER DEVELOPMENT ASSOCIATION · 20,750 people · 2019 | 2/3 | SYR4 |
| Lead | 3.1350000000000007 µg/L 21% of the EPA limit 15 µg/L Main supplier: WEB WATER DEVELOPMENT ASSOCIATION · 20,750 people · 2019
Highest in the ZIP: 8.029999999999994 µg/L — LONG LAKE COLONY · 100 people · 2019 | 3/3 | SYR4 |
| Chromium | 4.7 µg/L 4.7% of the EPA limit 100 µg/L Main supplier: WEB WATER DEVELOPMENT ASSOCIATION · 20,750 people · 2013 | 1/3 | SYR4 |
| Selenium | 1.7 µg/L 3.4% of the EPA limit 50 µg/L Main supplier: WEB WATER DEVELOPMENT ASSOCIATION · 20,750 people · 2013 | 1/3 | SYR4 |
| Antimony, Total | 0.3000 µg/L 5% of the EPA limit 6 µg/L Main supplier: WEB WATER DEVELOPMENT ASSOCIATION · 20,750 people · 2013 | 1/3 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: WEB WATER DEVELOPMENT ASSOCIATION · 20,750 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 57481
| Supplier | State | Population served |
|---|---|---|
| WEB WATER DEVELOPMENT ASSOCIATION | SD | 20,750 |
| LONG LAKE COLONY | SD | 100 |
| WESTPORT SANITARY DISTRICT | SD | 88 |
Frequently asked questions about ZIP 57481 tap water
Is the tap water in ZIP 57481 safe to drink?
EPA testing detected 12 contaminants across the water suppliers serving ZIP 57481. 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 57481?
3 public water suppliers report EPA drinking-water monitoring for ZIP 57481. Each is listed above with its population served.
What contaminants are in ZIP 57481's water?
EPA monitoring detected Fluoride, Copper, Nitrate, Barium, Lithium, and others across this ZIP's suppliers. The full list with levels and sources is above.