Learn about the California Air Resources Board's regulation for criteria pollutant and toxics emissions reporting.
Updated 1/14/2022
The California Air Resources Board, or CARB, adopted a new regulation for criteria pollutant and toxics emissions reporting titled, “Regulation for the Reporting of Criteria Air Pollutants and Toxic Air Contaminants (CTR)."
For more information, please visit CARB’s CTR web page.
The CTR Regulation aims to:
- Require calendar year reporting of criteria and toxic pollutant emissions data from regulated air emissions sources; and
- Establish consistent statewide annual emissions inventory data.
Compliance with CTR reporting will be implemented through:
- The Data Update for the emissions inventory during the permit renewal process.
- Other non-emissions inventory CTR data requirements may be requested during the Data Update or via a separate request.
- Failure to provide required CTR information may be subject to enforcement action under the rule.
How is CTR reporting different from the Air District’s Data Update?
- Data Update forms for CTR are sent to impacted facilities in early January regardless of the facility’s permit expiration date.
- Reported data will represent the previous calendar year material usage/throughput, activity, and emissions. That means your reported data covers activity from January 1 to December 31.
- Information for all permitted devices/sources with a Permit to Operate will be required.
- The only exception would be any new device/source started up during the permit renewal process.
- Additional CTR data requirements may be collected during the Data Update or via a separate request.
Who is subject to CTR reporting?
Updated 1/14/2022
*A Priority Score is an Air District calculated number based on the estimated air toxics emitted at a facility.
Is my facility subject to Applicability 1 or 2 requirements, and what are the next steps?
How will I know if my facility is subject to Applicability 3 or 4?
- If your facility requires reporting under CTR, the Air District will notify you prior to your next permit renewal cycle.
- The Air District is designing a system to fully implement these new CTR requirements.
How do I return my completed forms?
- By email (preferred)
- Email all completed forms to
- Use subject line “CTR reporting for Facility ID/Plant #:XXXXX”
- Attach only PDF or image files (e.g., jpeg, jpg, png, tiff, bmp).
- Email plus attachments are limited to 35 MB in size
- By mail:
BAAQMD – Engineering Division
375 Beale Street, Suite 600
San Francisco, CA 94105