AIR POLLUTION
CONTROL DISTRICT

Imperial County Logo

OZONE (O3)

On May 4, 2016 the US EPA published a final ruling indicating that Imperial County failed to meet attainment of the 2008 8-Hr Ozone standard by July 20, 2015 and therefore was reclassified to “Moderate” non-attainment. The reclassification triggered the development and submittal of a 2008 8-Hr Ozone SIP and RACT SIP by January 1, 2017. After a long and cooperative effort between the US EPA, the California Air Resources Board and the Imperial County Air Pollution Control District the Imperial County Air Pollution Control District Board of Directors adopted the 2017 Imperial County 2008 8-Hr Ozone State Implementation Plan (2007 Ozone SIP) which scientifically demonstrated that Imperial County attained the 2008 8-Hr Ozone Standard “but for” emissions from Mexico. This is also known as a “179B demonstration”.

Final 2017 Imperial County 2008 8-Hr Ozone SIP
Includes a certified RACT SIP analysis

To view the 2017 Ozone SIP as approved by CARB please click here
Look under Imperial County

Return to State Implementations Plans