Air Quality Division

Emissions Inventories

Revised on: December 10, 2019 - 1:22pm

An emissions inventory is an accounting of all air pollutant emissions released into the atmosphere. This accounting forms the basis for air quality planning that occurs at county, state, and national levels. Emissions inventories are completed when creating state implementation plans (SIPs).

Facility Emission Inventory Reporting

Pursuant to Arizona Administrative Code (AAC)1, any source subject to a permit requirement must also complete and submit an annual Emissions Inventory Questionnaire to ADEQ. ADEQ requires that the annual inventory questionnaire contains the actual quantity of emissions from permitted emission points and fugitive emissions as provided in the permit. ADEQ assesses fees based on the actual emissions submitted in the emissions inventory for sources under ADEQ jurisdiction.2

 

Forms

For the 2018 reporting year, forms are due June 1, 2019.

If you did not operate at all in 2018, 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

Crushing & Screening, Concrete Batch and Hot-Mix Asphalt General Permits
Annual emissions inventory for ADEQ general permits in the rock products industry (crushing & screening, concrete batch and hot-mix asphalt) is calculated by ADEQ from compliance certification data submitted through myDEQ. The emissions inventory notification letters will contain your calculated emission totals if you have submitted the appropriate compliance certifications.

If you didn’t receive a pre-calculated emissions inventory from ADEQ, you are required to complete and submit the following minor source reporting form:

  • Minor Sources: Reporting Form (.xls) | Download >

Other Non-Title V Permits
ADEQ is moving towards online submission of all emissions inventory reports. SLEIS is currently being updated for minor source reporting, and ADEQ will begin accepting a limited number of minor source reports this year. 

* When using the PDF forms, 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

ADEQ will be holding air quality workshops throughout the state. The list will be updated as new workshops are scheduled | View Workshops List >

2019 Workshop Presentation | View/Download >

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.

2AAC R18-2-326 – AAC R18-2-326.1 — This inventory comprises those sources under state jurisdiction emitting 1 ton/year or more of any individual regulated air pollutant, or 2.5 tons/year or more of any combination of regulated air pollutants as defined in AAC R18-2-101.92.

3AAC R18-2-101.92