Perkins County, SD

ZIP 57640

In ZIP 57640, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Lemmon meets every EPA legal limit; 3 contaminants are above health goals, led by total haloacetic acids (haa5) at 1.3× Peer-Reviewed Research.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Fine particles (PM2.5) average 5.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 92,120 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 57640

• Superfund sites nearbyA
• Factories and industrial sitesC
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityB
• Pesticide useF
• Neighborhood health statusD
• Past wildfire impactsD
• Past flood impactsA
• Noise levelsA
• Radiation signalsF

Based on 1 census tract · compiled October 25, 2026 · how each grade works and its sources

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