Montgomery County, IA

ZIP 50864

In ZIP 50864, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: New Market Water Supply meets every EPA legal limit; 7 contaminants are above health goals, led by bromodichloromethane at 145× California’s Public Health Goal.
• Nearest Superfund site: PCE Former Dry Cleaner, 9.2 miles away.
• Largest share of modeled toxic air from industry: Green Plains Shenandoah LLC (47%), mostly acrolein.
• Fine particles (PM2.5) average 6.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 143,272 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 50864

• Superfund sites nearbyA to C
• Factories and industrial sitesA to D
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityB to C
• Pesticide useF
• Neighborhood health statusC to D
• Past wildfire impactsA
• Past flood impactsB to D
• Noise levelsA to D
• Radiation signalsF

Based on 6 census tracts · compiled October 25, 2026 · how each grade works and its sources

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