Worcester County, MA

ZIP 01581

In ZIP 01581, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Westborough Water Department has 1 contaminant at or over an EPA legal limit; 16 contaminants are above health goals, led by arsenic at 2,889× California’s Public Health Goal.
• Nearest Superfund site: Hocomonco Pond, 0.3 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Isomedix Operations Inc. (46%), mostly ethylene oxide.
• Fine particles (PM2.5) average 6.5 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 01581

• Superfund sites nearbyD to F
• Factories and industrial sitesD
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityC to F
• Pesticide useC to F
• Neighborhood health statusA to C
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsD to F

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

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