Pierce County, WA

ZIP 98328

In ZIP 98328, 3 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), 10.0 miles away.
• Largest share of modeled toxic air from industry: Westrock Tacoma Mill (26%), mostly formaldehyde.
• Fine particles (PM2.5) average 5.0 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 98328

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

Based on 5 census tracts · compiled September 10, 2026 · how each grade works and its sources

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