Toxic air contaminants: Gap analysis and reporting

Overview

In June 2022, House Bill 22-1244: The Public Protections From Toxic Air Contaminants Act was signed into state law. This law required several changes to how air toxics emissions are reported in Colorado:

1. Certain sources began annually reporting their air toxic emissions to the division beginning with calendar year 2023 emissions.
2. In October 2024, the Air Pollution Control Division submitted a final gap analysis report to the Air Quality Control Commission that identified gaps in air toxic reporting.
3. In April 2025, the commission adopted changes to the state’s annual emission reporting program in Regulations 3 and 7.  The changes increase transparency, streamline reporting, and require more frequent reporting from a larger number of sources. This will enhance the state’s understanding of air pollution and help inform upcoming actions to address air toxics.

Additional data on reported air toxic emissions and information regarding how to report air toxics emissions in Colorado is available on the toxic air contaminants reporting website.

Public meetings opportunities

As of June 2025, the division does not have more upcoming meetings related to reporting of priority air toxics. The division anticipates holding meetings in the future to evaluate how this emission reporting can be further streamlined with other reporting requirements such as Air Pollutant Emission Notices (APEN).

The division will publish any future public participation opportunities related to the potential changes in air toxics emission reporting on this web page as they become available.

Contact us

Questions? Contact: cdphe_apcd_airtoxics@state.co.us

Use the subject line: Air Toxics Reporting.