Air quality plans are comprehensive strategies designed to meet or maintain compliance with federal and state air quality standards.
The two most common types of plans are attainment plans and maintenance plans.
Development of these plans requires extensive collaboration and cooperation with other agencies within the region, and includes businesses, industry, and the public.
The SacMetro AQMD is in the process of preparing a Redesignation Substitution (RS) request. This request demonstrates that the Sacramento Federal Ozone Nonattainment Area (SFNA) has met EPA's requirements based on ambient air quality to be redesignated as attainment for the former 1979 1-hour National Ambient Air Quality Standard (NAAQS) of 124 parts per billion (ppb). A separate RS request will be prepared for the 1997 8-hour standard.
The region is classified as a severe nonattainment area for the 2008 NAAQS, SacMetro AQMD along with the air districts which comprise the Sacramento Federal Nonattainment Area (SFNA) are working on the development of a plan to demonstrate attainment of the 2008 8-hour NAAQS of 75 ppb.
In 2015, EPA promulgated a new 8-hour NAAQS of 70 ppb. In 2016, the California Air Resource Board recommended that the region be designated nonattainment in their report Recommended Area Designations for the 0.70 ppm Federal 8-Hour Standard. EPA is expected to make a final classification and determination by October 1, 2017 (based on 2014-2016 data).