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Air Toxics Emissions Reporting Frequently Asked Questions

Oregon DEQ created this resource to address commonly asked questions about the 2020 Air Toxics Emissions Inventory Reporting requirements. Although 2020 reporting is complete, these questions remain available for future reference. 

For questions regarding the Cleaner Air Oregon program, including emissions inventory and reporting information, please visit the Cleaner Air Oregon website.

Questions about the published Air Toxics Emissions Inventory reports and DEQ’s review

DEQ uses the 2020 ATEI data to track changes in air toxics emissions across the state and help evaluate air quality programs. In addition, the data is reported to the EPA as a part of the triennial National Emissions Inventory. A summary of how DEQ intends to use the data and data products is available on the Air Toxics Reporting Background web page. ​

​DEQ performs an ongoing review of all submitted ATEI reports. As of summer 2022, initial reviews are complete and individual reports are available online. If, upon further assessment, DEQ believes a report may be incomplete or inconsistent, someone from DEQ will contact the facility with questions or to request additional information. Per OAR 340-245-0040(3), DEQ may require the owner or operator of a source to submit an updated emissions inventory.​

While under review, DEQ may find it necessary to align misplaced information in the facility's submission, including refreshing the formulas or codes so they can be imported into our database. In some cases, the agency may add combustion emissions using the Combustion Emission F​actor Search Tool and Annual Report data if emission units and emissions were improperly omitted from the reporting form. In most instances where emissions calculations are affected, DEQ will contact the facility owner or operator. Contact DEQ at if you have questions.

The reports posted to the  AQ Permit Data Search page present the sum of all estimated emissions at the facility for each reported pollutant. Depending on the facility, the emissions may result from production activities, material usage or both. Unit level emissions are not provided. ​

Yes. A registered facility contact will be able to request a copy of their reviewed ATEI. Contact DEQ at for assistance. ​