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EnviroTech :: Environment

EPA Proposes Tougher Air Quality Standards for Ground-Level Ozone

10:44 AM MDT | August 1, 2007 | Chemical Week Editorial Staff

EPA has proposed tightening national ambient air quality standards for ground-level ozone from 0.12 parts per million (ppm), to 0.070 ppm-0.075 ppm. EPA says it will also consider changing the eight-hour standard for ozone, a key component of smog, within a range of the current 0.08 ppm, to 0.06 ppm. The proposed changes are open for public comment for 90 days. The agency must make a final decision on the standard by its court-ordered February 2008 deadline. EPA is required to revisit air quality rules every five years to decide if changes are needed to better...

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