Tulare County, CA

ZIP 93258

In ZIP 93258, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Porterville, City Of meets every EPA legal limit; 15 contaminants are above health goals, led by pfos at 3.4× California’s Public Health Goal.
• Nearest Superfund site: Beckman Instruments (porterville Plant), 3.3 miles away.
• Largest share of modeled toxic air from industry: Gfp Ethanol LLC Dba Calgren Renewable Fuels (97%), mostly acrolein.
• Fine particles (PM2.5) average 11.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 5,378,638 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 93258

• Superfund sites nearbyA
• Factories and industrial sitesA
• Oil and gas wellsF
• Parks and nature nearbyC
• Air qualityF
• Drinking water qualityB to C
• Pesticide useF
• Neighborhood health statusC
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA
• Radiation signalsD

Based on 1 census tract · compiled October 25, 2026 · how each grade works and its sources

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