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Massachusetts, United States

Hopedale · Air quality

Thursday, Oct 29 · America/New York

Hopedale air quality

US air quality index

32

Good

US EPA scale

  1. Good0–50Current category
  2. Moderate51–100
  3. Unhealthy for sensitive groups101–150
  4. Unhealthy151–200
  5. Very unhealthy201–300
  6. Hazardous301–500+

A higher US AQI indicates more air pollution and greater health concern. Categories and pollutant concentration units are different measures.

Understand the EPA scale

All pollutants

PM1
6 µg/m³
PM2.5
3.8 µg/m³
PM10
13 µg/m³
Ozone
39.2 µg/m³
Nitrogen dioxide
6.7 µg/m³
Sulfur dioxide
1 µg/m³
Carbon monoxide
142 µg/m³
European AQI (separate scale)
1