San Luis Obispo County, CA

ZIP 93449

In ZIP 93449, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: City Of Grover Beach Public Works Dept has 2 contaminants at or over an EPA legal limit; 13 contaminants are above health goals, led by pfoa at 643× California’s Public Health Goal.
• 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: Phillips 66 Co-Santa Maria Refinery (99%), mostly hydrogen sulfide.
• Fine particles (PM2.5) average 7.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 901,427 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 93449

• Superfund sites nearbyA
• Factories and industrial sitesB to C
• Oil and gas wellsA to D
• Parks and nature nearbyB
• Air qualityA to C
• Drinking water qualityB to F
• Pesticide useD
• Neighborhood health statusB to D
• Past wildfire impactsC
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsD to F

Based on 5 census tracts · compiled October 25, 2026 · how each grade works and its sources

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