On this page: When are reports due? | Who must report? | How do I report? | Which air toxics must be reported? | Is there a fee on my reported emissions? | How do these reports differ from Air Pollutant Emission Notice (APEN) reporting? | Where can I find upcoming or previous presentations to assist reporters? | Technical assistance for small businesses
Air toxics reporting overview
When are reports due?
The first annual air toxics reports are due by June 30, 2024. These reports would include calendar year 2023 emissions. Subsequent reports are due on an annual basis on June 30 each year and include data on the previous calendar year.
Who must report?
All sources required to obtain an operating permit and synthetic minor sources are required to report annual facility-wide air toxics emissions.
If a facility changes ownership or control of the facility during the reporting year, the owner or operator as of June 30, 2024 is responsible for submitting the report. If a facility did not operate in the reporting year, it must verify the facility operating status in the provided reporting template. CDPHE will calculate zero emissions for facilities that did not operate at any point during the reporting year.
A draft list of facilities required to report calendar year 2023 TAC emissions can be accessed here: (spreadsheet or .pdf version 8/31/2023).
How do I report?
CDPHE will provide an electronic submission process. Additional guidance and any relevant reporting templates will be posted on this website once they are finalized.
Which air toxics must be reported?
A full list of all air toxics that must be reported are available on our Toxic air contaminants page.
Is there a fee on my reported emissions?
For the initial reports due June 30, 2024 no fee is required as part of the report submission. Any fees in future years would be dependent on rulemaking action from the Air Quality Control Commission (AQCC).
How do these reports differ from Air Pollutant Emission Notice (APEN) reporting?
This annual report does not replace APEN reporting requirements. Toxic air contaminant (TAC) reporting does not exempt reporting of smaller quantities of TAC that are below the reporting thresholds for APEN. While the Air Pollution Control Division will use APEN data to draft facility-wide TAC estimates for certification and review, facilities should still follow APEN requirements.
Where can I find upcoming or previous presentations to assist reporters?
For announcements of upcoming meetings related to reporting, visit public participation opportunities related to air toxics and air quality.
For recordings of historical presentations, visit the Air Pollution Control Division's overview of HB22-1244 webpage.
Technical assistance for small businesses
The Air Pollution Control Division provides free technical assistance to small businesses impacted by the air toxic reporting requirements. Businesses with fewer than 100 employees are eligible. For more information, visit the Small Business Assistance Program webpage or email cdphe_apcd_sbap@state.co.us.