Air Quality Division

Emissions Inventories

Revised on: June 23, 2022 - 12:29pm

An emissions inventory is an accounting of all air pollutant emissions actually released into the atmosphere. This accounting forms the basis for air quality planning that occurs at county, state, and national levels. Pursuant to Arizona Administrative Code (AAC), any source subject to a permit requirement must also complete and submit an annual Emissions Inventory Questionnaire to ADEQ. 

Does my Facility need to report?

All Class I permit holders will be required to report, as will all 2021 permit holders that did not submit an annual emissions inventory report to ADEQ last year. Class II permit holders that did report last year may or may not be required to report again this year. ADEQ has notified all permit holders who are required to report their 2021 emissions via email. If you are unsure whether you are required to report your 2021 emissions, please download the reporting guide | Download >

For operations permitted under ADEQ's Air General Permits for Crushing and Screening, Hot Mix Asphalt, or Concrete Batch Plants only:

As of January 1, 2022, the annual compliance certification process will include the review and certification of an emissions inventory for the preceding year. No additional annual emissions inventory reporting is required once that process is complete. However, if you believe that the emissions inventory report included in the myDEQ compliance certification is inaccurate and you would prefer to submit a separate inventory report to supersede it, you are welcome to do so via email.

Your annual permit compliance certifications must be submitted in the myDEQ web portal each January | Log In to myDEQ > | How to Get a myDEQ Account >

Facility Emission Inventory Reporting

For the 2021 reporting year, applicable reporting forms (listed below) are due June 1, 2022. Facilities reporting with the minor source form can submit their inventory via email | Email >

Forms

  • If you did not operate for the entirety of 2021, complete the Non-Operational Form | Download >
  • Major/Title V Sources
    Major sources are required to report emissions using the State & Local Emissions Inventory System (SLEIS) | View >
  • Minor/Non-Title V Sources - Other
  • Minor Sources: Reporting Form (.xls) | Download >
  • Alternative PDF form for Minor Sources* | Download >

* When using the PDF form, you need only to report your operational data (i.e., activity levels, throughputs, hours of operation, etc.). ADEQ will use this information to compute your emission totals. ADEQ will contact you if additional information is needed.

Emissions Inventory Training

Help Videos

Workshops

2022 Minor Source Presentation | View/Download >
2022 Minor Source Workshop | Watch Video >
2022 Major Source Presentation | View/Download >
2022 Major Source Workshop | Watch Video >

Emission Factors

This document provides a list of the emission factors used in ADEQ’s annual emission inventory questionnaire. These emission factors can also be used to manually calculate emission totals | Download >

1Arizona Administration Code (AAC), Title 18, Chapter 2, Section 327 (R18-2-327) — ADEQ is responsible for preparing and submitting an emissions inventory report to the Enivronmental Protection Agency for sources and emission points prescribed in Code of Federal Regulations, Part 40, Section 51.322 (40 CFR 51.322), and for sources that require a permit under Arizona Revised Statute 49-426.