Pierce County, WA

ZIP 98338

In ZIP 98338, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Southwood has 1 contaminant at or over an EPA legal limit; 11 contaminants are above health goals, led by pfos at 5× California’s Public Health Goal.
• Nearest Superfund site: Hidden Valley Landfill (thun Field), 1.6 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Puget Sound Coatings (84%), mostly diisocyanates.
• Fine particles (PM2.5) average 6.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 18,075 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 98338

• Superfund sites nearbyC to F
• Factories and industrial sitesB to C
• Oil and gas wellsA to D
• Parks and nature nearbyB to F
• Air qualityA
• Drinking water qualityB to F
• Pesticide useB to D
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to C
• Radiation signalsB

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

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