The Maricopa County Air Quality Department (MCAQD) Emissions Inventory (EI) Unit collects, reviews, stores, and manages air pollution emissions data for stationary sources in Maricopa County. The EI Unit also collects emission fees from Title V facilities and provides data to county, state, and federal agencies. An emissions inventory shows annual air pollutant emissions for one specific business location. An emissions inventory may be requested for any facility operating under a permit issued by MCAQD.
Annual emissions inventory reports serve several purposes:
They help determine a facility's compliance with its air quality permit as well as Maricopa County rules and regulations.
They help identify pollutant sources that may need new or additional controls, providing a basis for improved air pollution control strategies.
They provide a means of assessing progress in achieving reductions from existing controls.
They provide the basis for determining annual emission fees for Title V facilities.
Inventory data are used as input for air quality modeling to demonstrate attainment of national ambient air quality standards (NAAQS).
2021 Emission Inventory Report
The AQD Online Portal (IMPACT) is the Maricopa County Air Quality Department's (MCAQD) online inventory, monitoring, permitting, and compliance tracking data system. The portal currently supports Title V permits, Non-Title V permits, General permits, Asbestos NESHAP notifications and revisions, emissions inventory, and performance testing. The portal allows users to submit and track applications, reports, notifications, and documents electronically to MCAQD.
All 2021 annual EI reports must be completed using the AQD Online Portal (IMPACT). Paper forms will not be accepted.
The 2021 annual emissions inventory reports will be due on April 30, 2022 at 11:59 p.m. Note: MCAQD staff will be available to answer questions by phone or email until 5:00 p.m. on April 29, 2022. Any phone calls received after this time will be returned the following business day.