What was found in ZIP 57732
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 | 3900 µg/L 98% of the EPA limit 4000 µg/L Highest in the ZIP: OAK MOUNTAIN COUNTRY ESTATES · 85 people · 2017 | 2/6 | SYR4 |
| Nitrate | 657 µg/L 6.6% of the EPA limit 10000 µg/L Highest in the ZIP: LEAD-DEADWOOD SANITARY DISTRICT · 0 people · 2019 | 1/6 | SYR4 |
| Copper | 74.5 µg/L 5.7% of the EPA limit 1300 µg/L Main supplier: DEADWOOD · 1,156 people · 2017
Highest in the ZIP: 134.2 µg/L — MEADOW CREST SANITARY DISTRICT · 63 people · 2019 | 4/6 | SYR4 |
| TTHM | 29.13 µg/L 36% of the EPA limit 80 µg/L Main supplier: DEADWOOD · 1,156 people · 2019 | 2/6 | SYR4 |
| Total Haloacetic Acids (HAA5) | 9.056 µg/L 15% of the EPA limit 60 µg/L Main supplier: DEADWOOD · 1,156 people · 2019 | 1/6 | SYR4 |
| Lead | 1.44 µg/L 9.6% of the EPA limit 15 µg/L Main supplier: DEADWOOD · 1,156 people · 2017
Highest in the ZIP: 8.5 µg/L — OAK MOUNTAIN COUNTRY ESTATES · 85 people · 2019 | 4/6 | SYR4 |
| Gross Alpha, Excl. Radon And U | 6.54 pCi/L 44% of the EPA limit 15 pCi/L Highest in the ZIP: OAK MOUNTAIN COUNTRY ESTATES · 85 people · 2019 | 1/6 | SYR4 |
| Arsenic | 5 µg/L 50% of the EPA limit 10 µg/L Highest in the ZIP: OAK MOUNTAIN COUNTRY ESTATES · 85 people · 2017 | 1/6 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: DEADWOOD · 1,156 people · 2023
Highest in the ZIP: 0.0060 mg/L — PILLAR PEAK · 38 people · 2025 | 6/6 | 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 57732
| Supplier | State | Population served |
|---|---|---|
| DEADWOOD | SD | 1,156 |
| OAK MOUNTAIN COUNTRY ESTATES | SD | 85 |
| MEADOW CREST SANITARY DISTRICT | SD | 63 |
| PILLAR PEAK | SD | 38 |
| TWO BIT RANCH ESTATES | SD | 30 |
| LEAD-DEADWOOD SANITARY DISTRICT | SD | 0 |
Frequently asked questions about ZIP 57732 tap water
Is the tap water in ZIP 57732 safe to drink?
EPA testing detected 9 contaminants across the water suppliers serving ZIP 57732. 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 57732?
6 public water suppliers report EPA drinking-water monitoring for ZIP 57732. Each is listed above with its population served.
What contaminants are in ZIP 57732's water?
EPA monitoring detected Fluoride, Nitrate, Copper, TTHM, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.