Ozone air pollution season has begun.

Pima County, April 29, 2021 – As days grow longer and hotter in southern Arizona, levels of the air pollutant ground-level ozone begin to climb. Ozone pollution season begins in April and lasts through September. Fortunately, the air quality in Pima County is usually in the “good” or “moderate” range during this time period. There …

Ozone air pollution season has begun. Read More »