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Maryland, United States

Reisterstown · Air quality

Tuesday, Nov 3 · America/New York

Reisterstown air quality

US air quality index

42

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
9 µg/m³
PM2.5
6.1 µg/m³
PM10
14 µg/m³
Ozone
37.5 µg/m³
Nitrogen dioxide
10.3 µg/m³
Sulfur dioxide
2 µg/m³
Carbon monoxide
185 µg/m³
European AQI (separate scale)
1