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2015 Ozone NAAQS State Implementation Plan


In 2015, U.S. Environmental Protection Agency (EPA) promulgated a new National Ambient Air Quality Standards (NAAQS) for Ozone at a maximum daily 8-hour average concentration of 0.070 parts per million (ppm). The Sacramento Federal Nonattainment Area (SFNA, map) exceeded the standard and based on the modeling forecast, the SFNA air districts have requested a classification to "Severe" with attainment deadline of August 3, 2033. The Sacramento Regional 2015 National Ambient Air Quality Standard 8-Hour Ozone Attainment and Reasonable Further Progress Plan (Plan) below addresses the Clean Air Act planning requirements associated with the "Severe" classification.

Plan Documents

The Plan includes the elements of ozone trends, emissions inventories, photochemical modeling, attainment demonstration, ozone transport, conformity (general and transportation), reasonable further Progress (RFP), weight of evidence, vehicle miles traveled (VMT) offset demonstration, reasonably available control measure (RACM) analysis, statewide control measures, and proposed state and local contingency measures. 

Sacramento Regional Attainment and RFP Plan

DocumentFile Format
​​Attainment and RFP Plan with Appendices 
-- Except the Spreadsheets


​Attainment and RFP Plan without Appendices and Spreadsheets
​Appendix A - Emissions Inventory​pdf
App A-1-1 Estimated Emissions Forecast Summary
​Appendix B - Photochemical Modeling​pdf
Appendix C - Current Control Measurespdf​
​Appendix D - Reasonably Available Control Measures Analysispdf​
​Appendix E - Contingency Measures​pdf
Appendix F - Weight of Evidence​pdf
App F-6-1-II Placer County Ozone data between 01/01/2015 and 09/21/2019
Appendix G - Vehicle Miles Traveled Offset Demonstration pdf​

​Public Hearing and Adoption Schedule

Sacramento Federal Nonattainment Area (SFNA) air districts will hold public hearings to consider adoption of the Plan. The Plan covers the SFNA, which comprises with Sacramento and Yolo counties, and portions of El Dorado, Placer, Solano, and Sutter counties. More details on the public hearing meetings are also available at each air district's website. The links are provided below.

​Air District

​Date, time, and location

Sacramento ​Metropolitan Air Quality Management District

Thursday, ​September 28, 2023, 9:00am

Sacramento County Board of Supervisors Chambers (Room 1450)

700 H Street, Sacramento, CA 95814

El Dorado Air Quality Management District

Tuesday, October 17, 2023, 9:00am

​330 Fair Lane, Building A, Placerville, CA 95667

Feather River Air Quality Management District

Monday, ​October 2, 2023, 4:00pm

541 Washington Avenue, Yuba City, CA 95991

Placer County​ Air Pollution Control District

​Thursday, October 12, 2023, 2:30pm

Placer County Administrative Center, the "Domes" Placer County Supervisor's Chambers

175 Fulweiler Avenue, Auburn, CA 95603

Yolo-Solano Air Quality Management District

​Wednesday, October 11, 2023, 9:00am

1947 Galileo Ct., Suite 103; Davis CA 95618 

​California Air Resources Board

Thursday, October 26, 2023, 11:00am

Byron Sher Auditorium, 2nd Floor

1001 I Street, Sacramento, California 95814

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