PDEQ issues air quality operating permits to facilities known as Stationary Sources which may be any building, structure or installation subject to regulation which emits or may emit air pollution. These facilities must comply with the conditions in their operating permits to limit air pollution. The tab below for Stationary Sources includes information regarding Operating Permits and Compliance Guidance for these sources. Other sources of air pollution include Fugitive Dust, Asbestos and Open Burning, which are also regulated by PDEQ. Air quality regulations lay out the requirements and process for the application and issuance of an air quality permit.
PDEQ maintains a searchable database of stationary sources within Pima County. This database also contains links to pertinent air quality permitting documents for each permit.
Information on permitting and compliance guidance for stationary sources can be found in the sections below.
Air quality operating permits include a listing of all air pollution regulatory requirements that apply to the source. The program clarifies the air pollution control obligations of facilities by compiling in one document all of a source's compliance requirements. The intent is that by including all applicable requirements in one permit it will be easier for the source owner, the regulatory agency, and the public to determine if the source is in compliance.
Stationary sources with air quality operating permits typically have testing and reporting requirements written into their permits, or have these requirements as a result of an applicable industry-based standard contained in 40 CFR Part 60 (New Source Performance Standards - NSPS) or Part 63 (National Emissions Standards for Hazardous Air Pollutants - NESHAP). More information on Compliance Guidance for Stationary Sources includes:
PDEQ administers their asbestos program having adopted by reference in Pima County Code the Asbestos NESHAP (National Emissions Standards for Hazardous Air Pollutants). The program's intent is to minimize the release of asbestos-containing material. The regulations require the owner of the building and/or the operator to notify PDEQ before any demolition, or before renovations of buildings that contain a certain threshold amount of asbestos or asbestos containing materials. Additionally, specific work practices are to be followed during demolitions and renovations.
More information on Asbestos NESHAP includes:
Particulate matter is a generic term used to describe a complex group of air pollutants that vary in size and composition, depending upon the location and time of its source. The PM mixture of fine airborne solid particles and liquid droplets (aerosols) include components of nitrates, sulfates, elemental carbon, organic carbon compounds, acid aerosols, trace metals, and geological material. Some aerosols are formed in the atmosphere from gaseous combustion by-products such as volatile organic compounds (VOCs), oxides of sulfur (SOx) and nitrogen oxides (NOx). The size of PM can vary from coarse wind blown dust particles to fine particles directly emitted or formed from chemical reactions occurring in the atmosphere. PM10 comprises particles with an aerodynamic diameter less than or equal to a nominal 10 microns. PM2.5 comprises particles with an aerodynamic diameter less than or equal to a nominal 2.5 microns.
Ground level ozone forms near Earth's surface when the ultraviolet light in sunlight triggers a chemical reaction with "precursor pollutants" emitted by cars, power plants, and industrial sources. These precursor pollutants consist of nitrogen oxides (NOx) and volatile organic hydrocarbons (VOC). Ozone near ground level is a harmful pollutant. Ozone levels are carefully monitored during the summer months when the weather conditions are perfect for it to form. Sunshine, hot temperatures, and high emissions of NOx and VOC pollutants lead to high levels of ozone.
PDEQ issues advisories when the Tucson/eastern Pima County area is experiencing poor air quality. More information on Air Quality Advisories is available.
33 N. Stone Ave., Suite 700
Tucson, AZ 85701
Phone: (520) 724-7400
Fax: (520) 838-7432