Klamath County, OR

ZIP 97603

In ZIP 97603, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Shield Crest Condos meets every EPA legal limit; 2 contaminants are above health goals, led by lead at 330× California’s Public Health Goal.
• Nearest Superfund site: North Ridge Estates, 1.1 miles away.
• Largest share of modeled toxic air from industry: Collins Products LLC (50%), mostly formaldehyde.
• Fine particles (PM2.5) average 9.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 575,616 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 97603

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

Based on 12 census tracts · compiled September 10, 2026 · how each grade works and its sources

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