Warren County, IA

ZIP 50166

In ZIP 50166, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Milo Public Water Supply meets every EPA legal limit; 8 contaminants are above health goals, led by bromodichloromethane at 221× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Quality Manufacturing Corp - Urbandale (68%), mostly chromium.
• Fine particles (PM2.5) average 6.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 180,173 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 50166

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

Based on 3 census tracts · compiled October 25, 2026 · how each grade works and its sources

Loading the full report, with every source…