Humboldt County, NV

ZIP 89445

In ZIP 89445, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Mcdermitt Water System has 1 contaminant at or over an EPA legal limit; 4 contaminants are above health goals, led by arsenic at 3,075× 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: Sierra Pacific Power Co North Valmy Station (96%), mostly chromium compounds.
• Fine particles (PM2.5) average 6.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 18,694 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 89445

• Superfund sites nearbyA
• Factories and industrial sitesA to B
• Oil and gas wellsA
• Parks and nature nearbyB to D
• Air qualityA
• Drinking water qualityB to F
• Pesticide useF
• Neighborhood health statusB to D
• Past wildfire impactsD to F
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsD to F

Based on 6 census tracts · compiled September 10, 2026 · how each grade works and its sources

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