Pierce County, WA

ZIP 98360

In ZIP 98360, 5 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), 1.7 miles away.
• Largest share of modeled toxic air from industry: Puget Sound Coatings (68%), mostly diisocyanates.
• Fine particles (PM2.5) average 6.7 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 98360

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

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

Loading the full report, with every source…