Jefferson County, TX
ZIP 77640
In ZIP 77640, 7 of the 12 things we check have at least one part graded D or F.
- Drinking water: West Jefferson County Mwd meets every EPA legal limit; 8 contaminants are above health goals, led by bromodichloromethane at 116× California’s Public Health Goal.
- Nearest Superfund site: Star Lake Canal, 6.3 miles away (3 within 10 miles).
- Largest share of modeled toxic air from industry: Huntsman Petrochemical LLC Port Neches Facility (94%), mostly ethylene oxide.
- Fine particles (PM2.5) average 8.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
- About 85,013 kg of agricultural pesticides are applied in the county each year.
Grades for ZIP 77640
- Superfund sites nearbyA to D
- Factories and industrial sitesF
- Oil and gas wellsD to F
- Parks and nature nearbyC to D
- Air qualityB to D
- Drinking water qualityB to C
- Pesticide useC to F
- Neighborhood health statusC to F
- Past wildfire impactsA
- Past flood impactsB
- Noise levelsA to C
- Radiation signalsA to B
Based on 11 census tracts · compiled October 25, 2026 · how each grade works and its sources
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