St. Clair County, MI

ZIP 48039

In ZIP 48039, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: St. Clair Water And Sewer Authority meets every EPA legal limit; 9 contaminants are above health goals, led by lead at 102× 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: Sms Group Technical Services Warren Div (43%), mostly chromium compounds.
• Fine particles (PM2.5) average 7.4 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 106,588 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 48039

• Superfund sites nearbyA
• Factories and industrial sitesB
• Oil and gas wellsF
• Parks and nature nearbyC to D
• Air qualityB to C
• Drinking water qualityF
• Pesticide useD to F
• Neighborhood health statusD
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

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