Black Hawk County, IA

ZIP 50648

In ZIP 50648, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Hazleton Water Supply meets every EPA legal limit; 5 contaminants are above health goals, led by lead at 31× California’s Public Health Goal.
• Nearest Superfund site: Waterloo Coal Gasification Plant, 5.1 miles away.
• Largest share of modeled toxic air from industry: Henderson Products Inc (27%), mostly chromium.
• Fine particles (PM2.5) average 6.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 309,050 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 50648

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

Based on 5 census tracts · compiled September 10, 2026 · how each grade works and its sources

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