February 24, 2009.  A federal appeals court today ruled that Bush-era clean air standards were deficient, sending them back to the U.S. Environmental Protection Agency for corrective action. (more…)

In what could be the last major clean air policy decision of the Bush Administration, EPA is scheduled to publish its Advanced Notice of Proposed Rulemaking (ANPR) on the primary nitrogen dioxide (NO2) NAAQS in the Federal Register on January 16, 2009.  The ANPR could be signed as early as January 9, 2009. (more…)

EPA has published its first draft Integrated Science Assessment (ISA) for public review and comment.  The ISA is available online.   (more…)

Do you need a scorecard to keep track of the major milestones in the EPA’s reviews of the National Ambient Air Quality Standards (NAAQS) for the major pollutants?
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A draft report from the California Air Resources Board (CARB) has estimated that 14,000 to 24,000 premature deaths each year are attributable to fine particle air pollution (PM2.5). (more…)

The House Committee on Oversight and Government Reform chaired by Rep. Henry Waxman (D-CA) will hold an oversight hearing on May 20, 2008 to examine the Environmental Protection Agency’s (EPA) new ozone standards.

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In anticipation of the upcoming five-year review of the National Ambient Air Quality Standards (NAAQS) for particulate matter (PM), the U.S. EPA has appointed several new members to the Clean Air Scientific Advisory Committee (CASAC) and a number of additional consulting members to serve on the PM review panel.  (more…)

The U.S. Environmental Protection Agency has proposed to lower the National Ambient Air Quality Standards (NAAQS) for ozone, but not to the levels recommended by its independent scientific advisors.  In addition, the Agency is taking comment on the option of retaining the existing standard, leaving open the possibility that a final rule would leave the existing standard unchanged. (more…)

EPA’s Clean Air Scientific Advisory Committee (CASAC) has issued some strong advice to EPA Administrator Steve Johnson on the need to strengthen the air quality standards for ozone.  In a letter dated March 26, 2007, the scientists wrote:  

“Ozone Panel members were unanimous in recommending that the level of the current primary ozone standard should be lowered from 0.08 ppm to no greater than 0.070 ppm.” 

Further, the scientists emphasized the need to provide a margin of safety in standard-setting, as required by the Clean Air Act. 

Read the full letter providing comments on EPA’s final ozone Staff Paper online: 

http://www.epa.gov/sab/pdf/casac-07-002.pdf

The recommendations from the Clean Air Scientific Advisory Committee come on the heels of strong recommendations from the World Health Organization (WHO) to strengthen air quality guidelines for ozone.  The WHO report, issued in full on March 23, 2007, recommends an air quality guideline of 0.051 ppm ozone, 8-hour average, to protect against respiratory effects and premature deaths due to ozone.  See the full report online: 

http://www.euro.who.int/Document/E90038.pdf

A final EPA Staff Paper on the review of the National Ambient Air Quality Standards (NAAQS) for ozone air pollution concludes that the current standard is not protective of public health and must be strengthened.  (more…)