Minnehaha County, SD

ZIP 57020

In ZIP 57020, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Sioux Falls meets every EPA legal limit; 10 contaminants are above health goals, led by arsenic at 250× California’s Public Health Goal.
• Nearest Superfund site: Williams Pipe Line Co. Disposal Pit, 6.1 miles away.
• Largest share of modeled toxic air from industry: Diamond Mowers Inc. (81%), mostly chromium.
• Fine particles (PM2.5) average 6.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 292,411 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 57020

• Superfund sites nearbyA
• Factories and industrial sitesB to C
• Oil and gas wellsA
• Parks and nature nearbyD
• Air qualityA
• Drinking water qualityC to D
• Pesticide useF
• Neighborhood health statusB
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA
• Radiation signalsD

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

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