Montgomery County, TX
ZIP 77303
In ZIP 77303, 7 of the 12 things we check have at least one part graded D or F.
- Drinking water: Peach Creek Plantation Water System meets every EPA legal limit; 7 contaminants are above health goals, led by lead at 32× California’s Public Health Goal.
- Nearest Superfund site: Conroe Creosoting Co., 2.8 miles away (2 within 10 miles).
- Largest share of modeled toxic air from industry: Huntsman Petrochemical LLC (69%), mostly ethylene oxide.
- Fine particles (PM2.5) average 7.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
- About 14,209 kg of agricultural pesticides are applied in the county each year.
Grades for ZIP 77303
- Superfund sites nearbyC to F
- Factories and industrial sitesC to F
- Oil and gas wellsC to D
- Parks and nature nearbyC to D
- Air qualityB to C
- Drinking water qualityB to F
- Pesticide useB to C
- Neighborhood health statusC to D
- Past wildfire impactsA
- Past flood impactsC
- Noise levelsA to F
Based on 8 census tracts · compiled September 10, 2026 · how each grade works and its sources
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