Los Angeles County, CA
ZIP 91750
In ZIP 91750, 7 of the 12 things we check have at least one part graded D or F.
- Drinking water: Santa Clarita Valley Water Agency has 2 contaminants at or over an EPA legal limit; 19 contaminants are above health goals, led by lithium at 2.3× the USGS health-based screening level.
- Nearest Superfund site: Jet Propulsion Laboratory (nasa), 9.3 miles away.
- Largest share of modeled toxic air from industry: Sterigenics-Ontario Facility (51%), mostly ethylene oxide.
- Fine particles (PM2.5) average 10.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
- About 250,208 kg of agricultural pesticides are applied in the county each year.
Grades for ZIP 91750
- Superfund sites nearbyA to D
- Factories and industrial sitesC to D
- Oil and gas wellsA to C
- Parks and nature nearbyA to C
- Air qualityB to F
- Drinking water qualityA to F
- Pesticide useB to C
- Neighborhood health statusA to C
- Past wildfire impactsC to F
- Past flood impactsA to C
- Noise levelsA to D
- Radiation signalsC to D
Based on 12 census tracts · compiled October 25, 2026 · how each grade works and its sources
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