- 1Good
- 2Moderate
- 3Mildly Unhealthy
- 4Unhealthy
- 5Very Unhealthy
- 6Hazardous
56
Pittsburgh, PA
- O3: 20 (Good)
- PM2.5: 56 (Moderate)
Last updated: 5 EST
Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
- San Diego Mesa and Inland Valley, CA 52
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