What was found in ZIP 57049
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 | 1409 µg/L 35% of the EPA limit 4000 µg/L Highest in the ZIP: NORTH SIOUX CITY · 3,042 people · 2019 | 1/2 | SYR4 |
| Copper | 330 µg/L 25% of the EPA limit 1300 µg/L Main supplier: DAKOTA DUNES CID · 3,700 people · 2019 | 2/2 | SYR4 |
| TTHM | 88.87 µg/L 111% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: DAKOTA DUNES CID · 3,700 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 27.13 µg/L 45% of the EPA limit 60 µg/L Main supplier: DAKOTA DUNES CID · 3,700 people · 2019 | 2/2 | SYR4 |
| Lead | 8.68 µg/L 58% of the EPA limit 15 µg/L Main supplier: DAKOTA DUNES CID · 3,700 people · 2019 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.575 pCi/L 24% of the EPA limit 15 pCi/L Highest in the ZIP: NORTH SIOUX CITY · 3,042 people · 2014 | 1/2 | SYR4 |
| Lead | 0.0040 mg/L 27% of the EPA limit 0.0150 mg/L Main supplier: DAKOTA DUNES CID · 3,700 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 57049
| Supplier | State | Population served |
|---|---|---|
| DAKOTA DUNES CID | SD | 3,700 |
| NORTH SIOUX CITY | SD | 3,042 |
Frequently asked questions about ZIP 57049 tap water
Is the tap water in ZIP 57049 safe to drink?
EPA testing detected 7 contaminants across the water suppliers serving ZIP 57049. 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 57049?
2 public water suppliers report EPA drinking-water monitoring for ZIP 57049. Each is listed above with its population served.
What contaminants are in ZIP 57049's water?
EPA monitoring detected Fluoride, Copper, TTHM, Total Haloacetic Acids (HAA5), Lead, and others across this ZIP's suppliers. The full list with levels and sources is above.