Worcester County, MA

ZIP 01603

In ZIP 01603, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Aquarion Water Company, Millbury has 1 contaminant at or over an EPA legal limit; 9 contaminants are above health goals, led by arsenic at 646× 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: Isomedix Operations Inc. (47%), mostly ethylene oxide.
• Fine particles (PM2.5) average 6.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 90,069 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 01603

• Superfund sites nearbyA
• Factories and industrial sitesC
• Oil and gas wellsA
• Parks and nature nearbyC to F
• Air qualityA to B
• Drinking water qualityC to F
• Pesticide useC to F
• Neighborhood health statusC to D
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsF

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

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