San Diego County, CA

ZIP 91950

In ZIP 91950, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Sweetwater Authority has 1 contaminant at or over an EPA legal limit; 14 contaminants are above health goals, led by pfhxs at 1.9× California Notification Level.
• 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: General Dynamics (Nassco) (53%), mostly ethylbenzene.
• Fine particles (PM2.5) average 9.4 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 344,328 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 91950

• Superfund sites nearbyA
• Factories and industrial sitesD to F
• Oil and gas wellsC
• Parks and nature nearbyB to D
• Air qualityD to F
• Drinking water qualityF
• Pesticide useB to C
• Neighborhood health statusA to C
• Past wildfire impactsC
• Past flood impactsA to F
• Noise levelsA to D
• Radiation signalsC

Based on 17 census tracts · compiled October 25, 2026 · how each grade works and its sources

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