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Welcome to the Pima County Department of Environmental Quality Air Info Now web site, dedicated to providing current air quality information for the metropolitan Tucson area.  This website was developed with a grant from U.S. EPA and with assistance from The University of Arizona, The American Lung Association and Pima Association of Governments.  Here you will find information on air pollutants, their health effects, activities to help understand air pollution along with historic and current monitoring data.

This page provides links to these areas and also displays a quick snapshot of current air quality conditions. The updating photos show the current visibility from the rooftop of the County's downtown administration building. In the table below are air quality index (AQI) values, descriptors and applicable cautionary statements for the most currently polled pollution data.
 

Air Quality Index Values
For the Most Current Polled Data

( hour ending at 20:00 on 4/23/2014) 

Pollutant Highest Air Quality Index (AQI) Value Monitoring Site Air Quality Index (AQI) Category Health Effects Statement
Carbon Monoxide 2 22nd St. & Alvernon / 22nd St. & Craycroft Good None
Ozone 48 Green Valley / Saguaro Park East Good None
PM10 31 Near Grant & First Avenue Good None
PM2.5 42 Near Grant & First Avenue Good None
The highest average wind speed = 10.2mph blowing from the northwest at 330° at the Fairgrounds site. The highest average temperature was 75.8°F at the Rose Elementary site.

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