General Information

Air District Rule Development is generally governed by Chapter 6.5 of Part 3 of Division 26 of the California Health & Safety Code (Section 40725-40731). All Regulations and Rules adopted by the Air District are required to undergo a public notice of no less than 30 days (Health & Safety Code 40725), a public hearing (Health & Safety Code 40726) and require certain findings to be made prior to adoption (Health & Safety Code 40727). Special analysis are required in certain situations (Health & Safety Code 40727.2-40728.5). Other state and federal laws may require specific additional findings and/or actions to be taken (For example: 40 CFR 51 Appendix V contains completeness criteria for State Implementation Plan submissions). Plan development requirements vary dependent upon the type of plan and the underlying Federal or State planning requirement (For example 42 U.S.C. 7511a(c)(2) contains provisions regarding Reasonable Further Progress Plans)

A Rule Development Timeline has been developed to show the progression through a standard rule development process.

MDAQMD Rule Development Calendar has been developed to comply with the provisions of Health & Safety Code 40923(a) and to provide an overview of potential upcoming rule development in. 

California Environmental Quality Act (CEQA)

CEQA applies to projects undertaken, funded, or permitted by a public agency.  The MDAQMD reviews projects for air quality impacts to help prevent significant environmental damage.  For more information, please see the MDAQMD CEQA Guidelines Policy, or visit the California Land Use and Climate Innovation website.  CEQA documents for projects within the MDAQMD jurisdiction can be submitted to projectview@mdaqmd.ca.gov.

Rule Development

Please see the Governing Board Meeting Agenda for participation information.

Proposed Rule Actions

Proposed Amendment of Rule 1304 - The proposed amendment adds a sunset clause to MDAQMD District Rule 1304 – New Source Review Emission Calculations.  The clause applies to a provision that, under limited circumstances, allowed certain existing major facilities to use previously established offset potential-to-emit in a subsequent New Source Review action.  The sunset clause implements the terms of a negotiated settlement related to litigation challenging actions by the U.S. Environmental Protection Agency concerning MDAQMD’s New Source Review rules.  This action is proposed for the March 23, 2026 Governing Board Meeting.  Draft Staff Report

Proposed Amendment of Rule 218 - Stack Monitoring:  The proposed amendments will update outdated rule language and improve stringency and clarity by expanding applicability and record keeping requirements. This action is proposed for the March 23, 2026 Governing Board Meeting. Draft Staff Report

Recent Rule Actions

For more detail, or for actions not listed here, please see the approved Governing Board Meeting Minutes.

February 23, 2026

• SIP Cleanup - SCAQMD Rule 1145 - Plastic, Rubber, and Glass Coatings (1992)

August 25, 2025

• SIP Cleanup - RCAPCD Rule 56 - Scavenger Plants (1972)

June 09, 2025 

• Amendment - Regulation III - Fees: 301, 302, and 303

April 28, 2025

• SIP Cleanup - Rescission of SCAQMD Rules 1102 - Petroleum Solvent Dry Cleaners, and 1102.1 - Perchloroethylene Dry Cleaning Systems

March 24, 2025

• SIP Cleanup - Rescission of SCAQMD Rule 109 - Recordkeeping for Volatile Organic Compound Emissions
• SIP Cleanup - Rescission of SCAQMD Rule 1120 - Asphalt Pavement Heaters

February 24, 2025

• SIP Cleanup - Rescission of South Coast Air Quality Management District Rule 1141.1 - Coatings and Ink Manufacturing
• SIP Cleanup - Rescission of South Coast Air Quality Management District Rule 1164 - Semiconductor Manufacturing

January 27, 2025

• Rule 900 - Standards of Performance for New Stationary Sources (NSPS) - Amended 

Free viewers are required for some of the attached documents.
They can be downloaded by clicking on the icons below.

Acrobat Reader Windows Media Player Word Viewer Excel Viewer PowerPoint Viewer