What was found in ZIP 57585
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 | 3500 µg/L 35% of the EPA limit 10000 µg/L Highest in the ZIP: TRIPP COUNTY WATER USER DISTRICT · 4,860 people · 2019 | 1/2 | SYR4 |
| Copper | 452.5 µg/L 35% of the EPA limit 1300 µg/L Main supplier: SICANGU MNI WICONI RURAL WATER SYSTEM · 5,610 people · 2018 | 2/2 | SYR4 |
| Barium | 77.255 µg/L 3.9% of the EPA limit 2000 µg/L Highest in the ZIP: TRIPP COUNTY WATER USER DISTRICT · 4,860 people · 2012 | 1/2 | SYR4 |
| Lithium | 69.6 µg/L No EPA limit set Main supplier: SICANGU MNI WICONI RURAL WATER SYSTEM · 5,610 people · 2023 | 1/2 | UCMR-5 |
| TTHM | 47.2 µg/L 59% of the EPA limit 80 µg/L Main supplier: SICANGU MNI WICONI RURAL WATER SYSTEM · 5,610 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 32.86 µg/L 55% of the EPA limit 60 µg/L Main supplier: SICANGU MNI WICONI RURAL WATER SYSTEM · 5,610 people · 2019 | 2/2 | SYR4 |
| Lead | 3.92 µg/L 26% of the EPA limit 15 µg/L Main supplier: SICANGU MNI WICONI RURAL WATER SYSTEM · 5,610 people · 2018
Highest in the ZIP: 4.8 µg/L — TRIPP COUNTY WATER USER DISTRICT · 4,860 people · 2018 | 2/2 | SYR4 |
| Arsenic | 4 µg/L 40% of the EPA limit 10 µg/L Highest in the ZIP: TRIPP COUNTY WATER USER DISTRICT · 4,860 people · 2012 | 1/2 | SYR4 |
| Chromium | 3.18 µg/L 3.2% of the EPA limit 100 µg/L Highest in the ZIP: TRIPP COUNTY WATER USER DISTRICT · 4,860 people · 2012 | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.98 pCi/L 13% of the EPA limit 15 pCi/L Highest in the ZIP: TRIPP COUNTY WATER USER DISTRICT · 4,860 people · 2012 | 1/2 | SYR4 |
| Selenium | 1.285 µg/L 2.6% of the EPA limit 50 µg/L Highest in the ZIP: TRIPP COUNTY WATER USER DISTRICT · 4,860 people · 2012 | 1/2 | SYR4 |
| Lead | 0.0011 mg/L 7.3% of the EPA limit 0.0150 mg/L Main supplier: SICANGU MNI WICONI RURAL WATER SYSTEM · 5,610 people · 2025
Highest in the ZIP: 0.0020 mg/L — TRIPP COUNTY WATER USER DISTRICT · 4,860 people · 2024 | 2/2 | 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 57585
| Supplier | State | Population served |
|---|---|---|
| SICANGU MNI WICONI RURAL WATER SYSTEM | SD | 5,610 |
| TRIPP COUNTY WATER USER DISTRICT | SD | 4,860 |
Frequently asked questions about ZIP 57585 tap water
Is the tap water in ZIP 57585 safe to drink?
EPA testing detected 12 contaminants across the water suppliers serving ZIP 57585. 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 57585?
2 public water suppliers report EPA drinking-water monitoring for ZIP 57585. Each is listed above with its population served.
What contaminants are in ZIP 57585's water?
EPA monitoring detected Nitrate, Copper, Barium, Lithium, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.