The AQD Online Portal is used for new permit applications, renewals, and minor/non-minor modifications for:
This portal is also used for submitting asbestos notifications and revisions. Users must create an electronic signature account through Shared CROMERR Services (SCS) to access the AQD Online Portal.
The Dust and Miscellaneous Portal is used for:
First time users must create an account through the Dust and Miscellaneous Portal.
Annual background concentrations for major pollutants are available in this spreadsheet.
Information on Dust Sources, Control and Training and the regulations that apply to each.
The Emission Reduction Credit program creates a consistent method for sources to generate ERCs for future use in offsetting emissions in nonattainment areas throughout Maricopa County.
Learn more about air quality permits and the Permit Engineering division, including contacts and Planning Area maps.
Performance tests are conducted according to established procedures in order to quantify emissions and provide an objective means for determining compliance with established emission limits. See our Performance Testing page for more information.