Los Angeles County, CA
ZIP 91355
In ZIP 91355, 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.
- 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: Lockheed Martin Aeronautics Co (55%), mostly chromium.
- Fine particles (PM2.5) average 8.7 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 91355
- Superfund sites nearbyA
- Factories and industrial sitesC to F
- Oil and gas wellsF
- Parks and nature nearbyA to C
- Air qualityB to F
- Drinking water qualityB to F
- Pesticide useB to C
- Neighborhood health statusA to B
- Past wildfire impactsD to F
- Past flood impactsA
- Noise levelsA to D
- Radiation signalsD to F
Based on 12 census tracts · compiled October 25, 2026 · how each grade works and its sources
Loading the full report, with every source…