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    PDEQ Logo 
    Jan 17, 2020 - The Pima County Board of Supervisors (PC-BOS) as the governing body for the Pima County Air Quality Control District adopts rules for Pima County Code (PCC). The Pima County Air Quality Control District operates within the Pima County Department of Environmental Quality (PDEQ). PDEQ periodically proposes updates to PCC by and through the rulemaking process set forth by the PC-BOS. The intention of this rulemaking was to conform to the Code of Federal Regulations (CFR) in an effort to achieve consistency and accuracy in Title 17 of the PCC. PDEQ added new and updated incorporations by reference of the following federal regulations: Acid Rain, National Emission Standards for Hazardous Air Pollutants (NESHAP), New Source Performance Standards (NSPS), and other parts of Title 40 CFR. The federal regulations for Acid Rain, NESHAP, and the NSPS in effect July 1, 2019 were incorporated. The intention in updating the incorporations by reference is to continue the Pima County Air Quality Control District’s delegated authority from EPA to implement and enforce the Acid Rain, NESHAP, and NSPS programs in Pima County. 
    PDEQ Logo 
    Nov 13, 2019 - The Pima County Board of Supervisors (BOS) as the governing body for the Pima County Air Quality Control District adopts ordinances which are codified in the Pima County Code (PCC). The Pima County Air Quality Control District operates within the Pima County Department of Environmental Quality (PDEQ). PDEQ periodically proposes updates to PCC through the BOS. PDEQ is proposing updating incorporations by reference for the following federal regulations: Acid Rain, National Emission Standards for Hazardous Air Pollutants (NESHAP), New Source Performance Standards (NSPS), and other parts of Title 40 Code of Federal Regulations (CFR). The federal regulations would be incorporated as of July 1, 2019. PDEQ's intention is to continue its delegated authority from EPA to implement and enforce these programs in Pima County. In addition, PDEQ is updating the definition of Volatile Organic Compounds (VOC) in Section 17.04.340 to conform to federal regulations. The expedited rule text and other related information is available at the PDEQ office, on the Pima County Homepage, and on the PDEQ website, or you may request a copy by contacting our department. 
    Smoke from San Xavier Co-Op Farm Fire 
    Oct 02, 2019 - The Pima County Department of Environmental Quality (PDEQ) is issuing an air pollution health watch due to fire smoke and the potential for elevated levels of particulate matter in certain areas of town, particularly west and southwest of Tucson.  
    PDEQ Logo 
    Oct 01, 2019 - The 2019 ground-level ozone season in Pima County has ended with one day exceeding the U.S. Environmental Protection Agency's health standard.