Washoe County, NV

ZIP 89503

In ZIP 89503, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Truckee Meadows Water Authority has 3 contaminants at or over an EPA legal limit; 26 contaminants are above health goals, led by pfos at 7.6× 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: Tesla Gigafactory (99%), mostly cobalt compounds.
• Fine particles (PM2.5) average 9.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 11,722 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 89503

• Superfund sites nearbyA
• Factories and industrial sitesC to F
• Oil and gas wellsA
• Parks and nature nearbyB to F
• Air qualityD to F
• Drinking water qualityD to F
• Pesticide useB to D
• Neighborhood health statusB to D
• Past wildfire impactsD to F
• Past flood impactsB
• Noise levelsA to F
• Radiation signalsD

Based on 13 census tracts · compiled September 10, 2026 · how each grade works and its sources

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