Ada County, ID

ZIP 83704

In ZIP 83704, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Meridian Water Dept has 1 contaminant at or over an EPA legal limit; 19 contaminants are above health goals, led by pfos at 3× 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: Marathon Pipe Line LLC Boise (Station) Id (61%), mostly benzene.
• Fine particles (PM2.5) average 8.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 84,470 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 83704

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

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

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