California Air Resources Board

Current Regulatory documents for the Proposed CTR Amendments (2/9/22)

2020 Amendments Adopted, with Modifications 

On November 19, 2020, CARB adopted amendments to the proposed Regulation for the Reporting of Criteria Air Pollutants and Toxic Air Contaminants (CTR) and to the Air Toxics “Hot Spots” Emission Inventory Criteria and Guidelines (EICG) Regulation. However, based on public comment received, the Board directed CARB staff to consider additional modifications to the regulations prior to finalizing the revisions. Staff will incorporate any revisions through a public "15-day" revisions process, including a workshop.

Additional materials, including prior workshop presentations are available on our Meetings & Workshops page.

2018 Regulation Approved: Regulation Text and Rulemaking Documents

The final approved 2018 CTR regulation is now available. CTR is effective on January 1, 2020, with the first annual data reports due to local air districts by May 1, 2020, following air district "business as usual" reporting unless the district requires submission on a different schedule.

For any questions, contact ctr-report@arb.ca.gov.

CTR Workshop and Rulemaking Comments Received

This page includes comments received as part of CARB's development of the Regulation for the Reporting of Criteria Air Pollutants and Toxic Air Contaminants, or CTR. 

Note that comments received are available to the public and posted on CARB webpages.

2020 Rulemaking - Comments Received on Proposed CTR Amendments

Questions and comments received during the 2020 rulemaking process for amendments to CTR.

• February 11, 2021: Comments received during the EICG-CTR joint webinar to discuss proposed 15-day modifications
• September 30, 2020: Comments received during the EICG-CTR joint webinar

Informal Comments* Submitted Following Public Workshops held during February 2020

* Informal Comments are not included or submitted as part of the formal rulemaking docket for the regulation, but are considered and evaluated in developing the proposed amendments to the regulation. 

2018 Rulemaking Archive - Comments Received

Comments received during the 2018-2019 CTR rulemaking process for the original regulation.

Formal Comments Submitted on the 2018 Original Proposal, and the First and Second Proposed Modifications

"Informal" Comments Submitted Following Proposed 15-Day Changes Workshops, March 2019

Following the CARB Board meeting, staff was directed to revise the regulation under a 15-day revisions process. To seek input on the proposed updates, staff held a series of workshops during March 2019, sharing and summarizing the updated text, and requesting comments on the revisions by March 29, 2019. The informal comments (i.e., not included in formal rulemaking package) received to-date are provided below.

Formal 45-Day Comments Submitted Prior to Board Meeting

Informal Comments Submitted Prior to CARB Board Meeting, December 2018

The following "informal" comments were submitted during the regulation development process, prior to the CARB Board meeting during December 2018.

During 2019, CARB staff performed an initial assessment of facilities that would potentially be subject to the emissions data reporting requirements under the proposed Criteria and Toxics Reporting (CTR) Regulation. The preliminary draft list includes facilities subject to reporting due to their greenhouse gas, criteria pollutant, or toxic air contaminant emissions.

Update: 7/14/22

We are currently in the process of compiling data to provide the most accurate information to the public prior to release. 

Areas of the United States that are designated as Nonattainment for one or more National Ambient Air Quality Standards are required under the federal Clean Air Act to develop plans meeting specific requirements depending on the severity of the pollution problem.  Under State law, the California Air Resources Board has the responsibility to develop SIP strategies for cars, trucks and other mobile sources, as well as consumer products; while local air districts are primarily responsible for controlling emissions from stationary sources.

Plans and corresponding documents developed by CARB for statewide efforts include the following:

• 2026 Extreme Ozone SIP Revision
• SIPs for the 9 ug/m3 PM2.5 Standard
• State SIP Strategy (2022, 2016, 2012, 2011, 2007, 2003, 1994)
• Mobile Source Strategy (2025, 2020, 2016)
• Statewide SIP Emissions Inventories
• Clean Fuels for Fleets SIP Certification
• Smog Check Performance Standard Modeling & Program Certification
• 2018 Updates to the California State Implementation Plan
• Infrastructure SIP
• Regional Haze
• California-Mexico Border Activities
• Statewide Windblown Dust
• California Smog Check Contingency Measure

CARB Regulatory submittals into the California SIP:

• Waiver and Authorizations
• Statewide Regulations

Areas of the State that are designated as Nonattainment for one or more National Ambient Air Quality Standards are required under the federal Clean Air Act to develop plans meeting specific requirements depending on the severity of the pollution problem. Attainment plans and and corresponding documents are available on CARB's website for the following areas:

• Butte County
• Coachella Valley
• Eastern Kern County
• Great Basin (includes Owens Valley, Coso Junction, Mono Basin, and Mammoth Lakes nonattainment areas)
• Imperial County
• Mariposa County
• Northern Sierra
• Sacramento Region (El Dorado AQMD, Feather River AQMD, Placer County APCD, Sacramento Metropolitan AQMD, and Yolo-Solano AQMD)
• San Diego County
• San Francisco Bay Area
• San Joaquin Valley
• Santa Barbara
• South Coast 
• Ventura County
• Western Mojave Desert (Antelope Valley AQMD and Mojave Desert AQMD)

Certain areas do not have plans available electronically. For information on plans for other areas, contact CARB staff.

If you do not know which of California's 35 local air districts applies to your situation, please go here.