Walker County, TX
ZIP 77340
In ZIP 77340, 6 of the 12 things we check have at least one part graded D or F.
- Drinking water: City Of Huntsville has 1 contaminant at or over an EPA legal limit; 12 contaminants are above health goals, led by pfos at 5.2× California’s Public Health Goal.
- Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
- Largest share of modeled toxic air from industry: Huntsman Petrochemical LLC (60%), mostly ethylene oxide.
- Fine particles (PM2.5) average 8.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
- About 29,369 kg of agricultural pesticides are applied in the county each year.
Grades for ZIP 77340
- Superfund sites nearbyA
- Factories and industrial sitesB to F
- Oil and gas wellsC to D
- Parks and nature nearbyA to C
- Air qualityB to D
- Drinking water qualityA to D
- Pesticide useC to D
- Neighborhood health statusB to F
- Past wildfire impactsA
- Past flood impactsB to C
- Noise levelsA to B
Based on 8 census tracts · compiled October 25, 2026 · how each grade works and its sources
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