Healthy air helps us breathe easier, and we want to keep our beautiful blue skies clean for you, your family and people who visit the greater Tucson region. Our population exceeds 1 million, which means understanding the sources of air pollution and initiating proactive steps to curb it are important for maintaining and improving the air quality.
As the region’s federally designated transportation conformity and state-designated air quality planning organization, Pima Association of Governments develops and analyzes plans to ensure the region maintains healthy air. PAG is responsible for demonstrating that regional transportation activities do not adversely impact air quality.
Although air pollutants are emitted from commercial and industrial sources, a major contribution of human-caused air pollution in Pima County stems from motor vehicle use. PAG promotes vehicle travel reduction through its Travel Reduction Program and the use of alternatively fueled vehicles to reduce motor vehicle emissions. Land development patterns and meteorological conditions also can affect air quality.
PAG also conducts periodic inventories of greenhouse gas (GHG) emissions for the region.
Air quality reports:
- Regional Greenhouse Gas Emissions Inventory (2016-2021) – updated in 2023
- Ozone Status Report – updated in 2018
- Arizona I-10 Alternative Fuels Corridor Deployment Plan – created in 2020
- Regional Air Quality Monitoring and Information GIS Map
We are all responsible for what we do to reduce pollutants in our air. Read tips on actions you can take today to help keep our air healthy.