Kennebec County, ME

ZIP 04330

In ZIP 04330, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Hallowell Water District meets every EPA legal limit; 7 contaminants are above health goals, led by arsenic at 250× California’s Public Health Goal.
• Nearest Superfund site: O'connor Co., 10.0 miles away.
• Largest share of modeled toxic air from industry: Sappi N.A. Inc. - Somerset Operations (91%), mostly formaldehyde.
• Fine particles (PM2.5) average 4.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 22,401 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 04330

• Superfund sites nearbyA
• Factories and industrial sitesA to C
• Oil and gas wellsA
• Parks and nature nearbyB to D
• Air qualityA
• Drinking water qualityC
• Pesticide useC to D
• Neighborhood health statusC to F
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsB to C

Based on 7 census tracts · compiled October 25, 2026 · how each grade works and its sources

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