Marin County, CA
ZIP 94941
In ZIP 94941, 1 of the 12 things we check have at least one part graded D or F.
- Drinking water: Nps Ggnra meets every EPA legal limit; 6 contaminants are above health goals, led by bromodichloromethane at 149× California’s Public Health Goal.
- Nearest Superfund site: United Heckathorn Co., 7.0 miles away (2 within 10 miles).
- Largest share of modeled toxic air from industry: Bio-Rad Laboratories Inc (47%), mostly acrylamide.
- Fine particles (PM2.5) average 7.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
- About 3,141 kg of agricultural pesticides are applied in the county each year.
Grades for ZIP 94941
- Superfund sites nearbyA to C
- Factories and industrial sitesA to D
- Oil and gas wellsA
- Parks and nature nearbyA to B
- Air qualityA to C
- Drinking water qualityC
- Pesticide useA to B
- Neighborhood health statusA to C
- Past wildfire impactsA
- Past flood impactsA
- Noise levelsA to C
Based on 9 census tracts · compiled October 25, 2026 · how each grade works and its sources
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