Los Angeles County, CA

ZIP 91387

In ZIP 91387, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Santa Clarita Valley W.a.-Pinetree Div. has 2 contaminants at or over an EPA legal limit; 12 contaminants are above health goals, led by pfhxs at 1.5× California Notification Level.
• Nearest Superfund site: Jet Propulsion Laboratory (nasa), 9.3 miles away.
• Largest share of modeled toxic air from industry: Sterigenics US LLC La 50Th (21%), mostly ethylene oxide.
• Fine particles (PM2.5) average 9.0 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 91387

• Superfund sites nearbyA to D
• Factories and industrial sitesA to C
• Oil and gas wellsA to F
• Parks and nature nearbyA to C
• Air qualityA to F
• Drinking water qualityA to F
• Pesticide useB
• Neighborhood health statusA to C
• Past wildfire impactsF
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsC to D

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

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