What was found in ZIP 57385
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 | 300 µg/L 3% of the EPA limit 10000 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2019
Highest in the ZIP: 1800 µg/L — WOONSOCKET · 618 people · 2019 | 2/2 | SYR4 |
| Nitrite | 753.5 µg/L 75% of the EPA limit 1000 µg/L Highest in the ZIP: WOONSOCKET · 618 people · 2019 | 1/2 | SYR4 |
| Copper | 733 µg/L 56% of the EPA limit 1300 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2019 | 2/2 | SYR4 |
| Fluoride | 450 µg/L 11% of the EPA limit 4000 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2019
Highest in the ZIP: 700 µg/L — WOONSOCKET · 618 people · 2015 | 2/2 | SYR4 |
| TTHM | 71.945 µg/L 90% of the EPA limit 80 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2019 | 2/2 | SYR4 |
| Lithium | 60 µg/L No EPA limit set Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2023 | 1/2 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 48.6 µg/L 81% of the EPA limit 60 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2019 | 2/2 | SYR4 |
| Barium | 42.4 µg/L 2.1% of the EPA limit 2000 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2013 | 2/2 | SYR4 |
| Lead | 3.52 µg/L 23% of the EPA limit 15 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2019
Highest in the ZIP: 8.32 µg/L — WOONSOCKET · 618 people · 2018 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.8 pCi/L 25% of the EPA limit 15 pCi/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2016
Highest in the ZIP: 5.16 pCi/L — WOONSOCKET · 618 people · 2015 | 2/2 | SYR4 |
| Arsenic | 3 µg/L 30% of the EPA limit 10 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2013 | 1/2 | SYR4 |
| Chromium | 1.6 µg/L 1.6% of the EPA limit 100 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2013
Highest in the ZIP: 1.662 µg/L — WOONSOCKET · 618 people · 2018 | 2/2 | SYR4 |
| Selenium | 1.4 µg/L 2.8% of the EPA limit 50 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2013 | 2/2 | SYR4 |
| Antimony, Total | 0.4000 µg/L 6.7% of the EPA limit 6 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2013 | 1/2 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2025
Highest in the ZIP: 0.0130 mg/L — WOONSOCKET · 618 people · 2025 | 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 57385
| Supplier | State | Population served |
|---|---|---|
| MID-DAKOTA RURAL WATER | SD | 11,833 |
| WOONSOCKET | SD | 618 |
Frequently asked questions about ZIP 57385 tap water
Is the tap water in ZIP 57385 safe to drink?
EPA testing detected 15 contaminants across the water suppliers serving ZIP 57385. 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 57385?
2 public water suppliers report EPA drinking-water monitoring for ZIP 57385. Each is listed above with its population served.
What contaminants are in ZIP 57385's water?
EPA monitoring detected Nitrate, Nitrite, Copper, Fluoride, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.