Energy & environment · 19/05/2010

EPA Finalizes Determination for California's Coso Junction Nonattainment Area

The US Environmental Protection Agency (EPA) has finalized its determination that the Coso Junction Nonattainment Area (CJNA) in California has met the 24-hour National Ambient Air Quality Standard (NAAQS) for particulate matter with a diameter of 10 micrometers (PM-10). This decision is based on quality-assured air quality monitoring data from 2006-2008, and preliminary data for 2010 shows the CJNA continues to meet the standard.