Chambers County, TX

ZIP 77523

In ZIP 77523, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Tower Terrace meets every EPA legal limit; 8 contaminants are above health goals, led by bromodichloromethane at 334× California’s Public Health Goal.
• Nearest Superfund site: Patrick Bayou, 9.1 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Equistar Chemicals Bayport Chemicals Plant (41%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 69,664 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 77523

• Superfund sites nearbyA to C
• Factories and industrial sitesF
• Oil and gas wellsF
• Parks and nature nearbyC to D
• Air qualityC to D
• Drinking water qualityA to F
• Pesticide useB to F
• Neighborhood health statusB to C
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to B
• Radiation signalsA

Based on 4 census tracts · compiled October 25, 2026 · how each grade works and its sources

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