Imperial County, CA

ZIP 92231

In ZIP 92231, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Centinela State Prison meets every EPA legal limit; 9 contaminants are above health goals, led by lithium at 6.6× the USGS health-based screening level.
• Closer to Superfund sites than 55% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Spreckels Sugar Co Inc. (65%), mostly ammonia.
• Fine particles (PM2.5) average 8.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 2,702,670 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 92231

• Superfund sites nearbyA to C
• Factories and industrial sitesA to D
• Oil and gas wellsA
• Parks and nature nearbyA to C
• Air qualityD to F
• Drinking water qualityA to C
• Pesticide useF
• Neighborhood health statusA to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsB to D

Based on 11 census tracts · compiled October 25, 2026 · how each grade works and its sources

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