St. Clair County, MI

ZIP 48074

In ZIP 48074, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Port Huron, City Of meets every EPA legal limit; 3 contaminants are above health goals, led by pfos at 2.6× 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: Michigan Metal Coatings (41%), mostly chromium.
• Fine particles (PM2.5) average 7.0 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 48074

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

Based on 3 census tracts · compiled October 25, 2026 · how each grade works and its sources

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