Madison County, IA

ZIP 50261

In ZIP 50261, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Fox Creek Benefitted Wtr. District meets every EPA legal limit; 8 contaminants are above health goals, led by dibromochloromethane at 57× California’s Public Health Goal.
• Nearest Superfund site: Railroad Avenue Groundwater Contamination, 6.8 miles away.
• Largest share of modeled toxic air from industry: Quality Manufacturing Corp - Urbandale (61%), mostly chromium.
• Fine particles (PM2.5) average 6.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 180,228 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 50261

• Superfund sites nearbyA to D
• Factories and industrial sitesA to B
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA to B
• Drinking water qualityC to D
• Pesticide useF
• Neighborhood health statusA to B
• Past wildfire impactsA
• Past flood impactsC to F
• Noise levelsA
• Radiation signalsF

Based on 4 census tracts · compiled October 25, 2026 · how each grade works and its sources

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