Jackson County, TX

ZIP 77991

In ZIP 77991, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: La Salle Landing Water System has 1 contaminant at or over an EPA legal limit; 9 contaminants are above health goals, led by arsenic at 3,006× California’s Public Health Goal.
• Closer to Superfund sites than 53% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Formosa Plastics Corp Texas (68%), mostly ethylene oxide.
• Fine particles (PM2.5) average 7.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 219,618 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 77991

• Superfund sites nearbyC
• Factories and industrial sitesC
• Oil and gas wellsF
• Parks and nature nearbyC
• Air qualityB
• Drinking water qualityD to F
• Pesticide useF
• Neighborhood health statusD
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsA
• Radiation signalsB

Based on 1 census tract · compiled September 10, 2026 · how each grade works and its sources

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