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California, United States

Hilmar-Irwin · Air quality

Sunday, Oct 25 · America/Los Angeles

Hilmar-Irwin air quality

US air quality index

44

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
13 µg/m³
PM2.5
5.4 µg/m³
PM10
15 µg/m³
Ozone
6.6 µg/m³
Nitrogen dioxide
20 µg/m³
Sulfur dioxide
1 µg/m³
Carbon monoxide
229 µg/m³
European AQI (separate scale)
2