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Other State Implementation Plan (SIP) Revisions

The U.S. Environmental Protection Agency periodically reviews and establishes health-based national air quality standards (also referred to as NAAQS) for ozone, particulate matter, and other criteria air pollutants guided by the Clean Air Act. Federal Clean Air Act requires areas not in attainment of these standards to develop plans, known as State Implementation Plans (SIPs). SIPs are comprehensive plans that describe how an area will attain federal air quality standards. The main Air Quality Management Plan (AQMP) can be found here. Below is a list of other new and previously submitted SIPs/ SIP revisions developed to address various Clean Air Act requirements.

Coachella Valley Extreme Area Plan for 1997 Ozone Standard
The Coachella Valley is reclassified to an Extreme nonattainment area for the 1997 8-hour ozone standard, with an attainment date of June 15, 2024. A new Plan is developed to address the Extreme area requirements. 

South Coast PM2.5 Plan for 2006 PM2.5 Standard
The South Coast Air Basin (Basin) is a Serious nonattainment area for the 2006 24-Hour PM2.5 standard, with an attainment date of December 31, 2019. Based on ambient monitoring data from 2017-2019, the Basin did not attain the standard by the deadline. A revision to the State Implementation Plan is developed to address the new planning requirements.

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