What was found in ZIP 57350
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 | 1900 µg/L 48% of the EPA limit 4000 µg/L Highest in the ZIP: RIVERSIDE COLONY · 80 people · 2013 | 3/4 | SYR4 |
| Copper | 543.5 µg/L 42% of the EPA limit 1300 µg/L Main supplier: HURON · 14,263 people · 2017
Highest in the ZIP: 733 µg/L — MID-DAKOTA RURAL WATER · 11,833 people · 2019 | 4/4 | SYR4 |
| Nitrate | 700 µg/L 7% of the EPA limit 10000 µg/L Highest in the ZIP: RIVERSIDE COLONY · 80 people · 2019 | 2/4 | SYR4 |
| Lithium | 140 µg/L No EPA limit set Main supplier: HURON · 14,263 people · 2023 | 2/4 | UCMR-5 |
| TTHM | 58.515 µg/L 73% of the EPA limit 80 µg/L Main supplier: HURON · 14,263 people · 2019
Highest in the ZIP: 71.945 µg/L — MID-DAKOTA RURAL WATER · 11,833 people · 2019 | 2/4 | SYR4 |
| Nitrite | 60 µg/L 6% of the EPA limit 1000 µg/L Highest in the ZIP: RIVERSIDE COLONY · 80 people · 2019 | 1/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 37.67 µg/L 63% of the EPA limit 60 µg/L Main supplier: HURON · 14,263 people · 2019
Highest in the ZIP: 48.6 µg/L — MID-DAKOTA RURAL WATER · 11,833 people · 2019 | 2/4 | SYR4 |
| Barium | 42.4 µg/L 2.1% of the EPA limit 2000 µg/L Highest in the ZIP: MID-DAKOTA RURAL WATER · 11,833 people · 2013 | 3/4 | SYR4 |
| Lead | 8.95 µg/L 60% of the EPA limit 15 µg/L Main supplier: HURON · 14,263 people · 2017 | 4/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.8 pCi/L 25% of the EPA limit 15 pCi/L Highest in the ZIP: MID-DAKOTA RURAL WATER · 11,833 people · 2016 | 1/4 | SYR4 |
| Selenium | 3.7 µg/L 7.4% of the EPA limit 50 µg/L Highest in the ZIP: RIVERSIDE COLONY · 80 people · 2013 | 3/4 | SYR4 |
| Arsenic | 3 µg/L 30% of the EPA limit 10 µg/L Highest in the ZIP: MID-DAKOTA RURAL WATER · 11,833 people · 2013 | 1/4 | SYR4 |
| Chromium | 2.4 µg/L 2.4% of the EPA limit 100 µg/L Highest in the ZIP: RIVERSIDE COLONY · 80 people · 2013 | 3/4 | SYR4 |
| Antimony, Total | 0.4000 µg/L 6.7% of the EPA limit 6 µg/L Highest in the ZIP: MID-DAKOTA RURAL WATER · 11,833 people · 2013 | 1/4 | SYR4 |
| Lead | 0.0060 mg/L 40% of the EPA limit 0.0150 mg/L Main supplier: HURON · 14,263 people · 2023 | 4/4 | 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 57350
| Supplier | State | Population served |
|---|---|---|
| HURON | SD | 14,263 |
| MID-DAKOTA RURAL WATER | SD | 11,833 |
| HURON COLONY | SD | 95 |
| RIVERSIDE COLONY | SD | 80 |
Frequently asked questions about ZIP 57350 tap water
Is the tap water in ZIP 57350 safe to drink?
EPA testing detected 15 contaminants across the water suppliers serving ZIP 57350. 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 57350?
4 public water suppliers report EPA drinking-water monitoring for ZIP 57350. Each is listed above with its population served.
What contaminants are in ZIP 57350's water?
EPA monitoring detected Fluoride, Copper, Nitrate, Lithium, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.