2019 State Area Designations Regulation

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This page last reviewed September 17, 2019

Proposed 2019 Amendments to Area Designations for State Ambient Air Quality Standards

Hearing Date(s)
Public Comments Received
Final Approval / OAL Action

OAL approved the rulemaking and filed with Secretary of State on April 16, 2020. The effective date is July 1, 2020.

Adopted Regulations and Materials Submitted to OAL

The Final Rulemaking package was submitted to OAL on March 23, 2020.  OAL will have until May 5, 2020, to make a final determination.

Updated Informative Digest
Final Statement of Reasons
Final Regulation Order
Hearing Action and Supplemental 15 Day Notices

Posted December 18, 2019

Resolution 19-30
Public Hearing Notice and Related Material

Posted October 22, 2019

Notice of Public Hearing  (Deadline to Submit Public Comments: December 9, 2019, or at the Public Hearing)
Staff Report: Initial Statement of Reasons (ISOR)
Appendix A: Proposed Regulation Order
Appendix B: Area Designation Criteria
Appendix C: Maps and Tables of Area Designations for State and National Ambient Air Quality Standards
Appendix D: Convention for Rounding Ambient Air Quality Data
Appendix E: Designation Values and Expected Peak Day Concentrations
Appendix F: Designation Value Tables
More Information

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