San Francisco County, CA

ZIP 94121

In ZIP 94121, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Presidio Of San Francisco meets every EPA legal limit; 12 contaminants are above health goals, led by pfoa at 357× California’s Public Health Goal.
• Nearest Superfund site: Hunters Point Naval Shipyard, 6.7 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Bio-Rad Laboratories Inc (49%), mostly acrylamide.
• Fine particles (PM2.5) average 8.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 21 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 94121

• Superfund sites nearbyA to D
• Factories and industrial sitesD to F
• Oil and gas wellsA
• Parks and nature nearbyA to C
• Air qualityD to F
• Drinking water qualityC
• Pesticide useA
• Neighborhood health statusA to C
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to C
• Radiation signalsA to B

Based on 14 census tracts · compiled October 25, 2026 · how each grade works and its sources

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