Montgomery County, TX

ZIP 77386

In ZIP 77386, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Montgomery County Mud 127 meets every EPA legal limit; 7 contaminants are above health goals, led by bromodichloromethane at 120× 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 (40%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.1 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 77386

• Superfund sites nearbyA
• Factories and industrial sitesF
• Oil and gas wellsD
• Parks and nature nearbyC to D
• Air qualityD
• Drinking water qualityA to C
• Pesticide useA to C
• Neighborhood health statusA to D
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsA

Based on 10 census tracts · compiled October 25, 2026 · how each grade works and its sources

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