Grundy County, IA

ZIP 50669

In ZIP 50669, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Reinbeck Water Supply meets every EPA legal limit; 7 contaminants are above health goals, led by lead at 34× California’s Public Health Goal.
• Nearest Superfund site: Waterloo Coal Gasification Plant, 7.5 miles away.
• Largest share of modeled toxic air from industry: Zinpro Corp (59%), mostly cobalt compounds.
• Fine particles (PM2.5) average 6.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 318,803 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 50669

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

Based on 4 census tracts · compiled September 10, 2026 · how each grade works and its sources

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