Lawrence County, SD

ZIP 57779

In ZIP 57779, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Oak Mountain Country Estates has 1 contaminant at or over an EPA legal limit; 6 contaminants are above health goals, led by arsenic at 1,250× California’s Public Health Goal.
• Closer to Superfund sites than 55% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Gcc Dacotah (56%), mostly chromium compounds.
• Fine particles (PM2.5) average 5.4 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 57779

• Superfund sites nearbyA to C
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityA
• Drinking water qualityC to D
• Pesticide useD to F
• Neighborhood health statusC to D
• Past wildfire impactsA to D
• Past flood impactsA
• Noise levelsA
• Radiation signalsD to F

Based on 3 census tracts · compiled September 10, 2026 · how each grade works and its sources

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