Lawrence County, SD

ZIP 57783

In ZIP 57783, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Oak Mountain Country Estates meets every EPA legal limit; 3 contaminants are above health goals, led by arsenic at 1,250× California’s Public Health Goal.
• Nearest Superfund site: Gilt Edge Mine, 6.9 miles away.
• Largest share of modeled toxic air from industry: Gcc Dacotah (74%), mostly chromium compounds.
• Fine particles (PM2.5) average 5.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 27,885 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 57783

• Superfund sites nearbyA to D
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyA to C
• Air qualityA
• Drinking water qualityA to C
• Pesticide useB to F
• Neighborhood health statusA to F
• Past wildfire impactsA to D
• Past flood impactsA
• Noise levelsA
• Radiation signalsC to F

Based on 7 census tracts · compiled October 25, 2026 · how each grade works and its sources

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