According to Bloomberg Environment (subscription required), EPA’s Clean Air Science Advisory Committee cannot reach agreement whether to recommend that the NAAQS for PM2.5 be lowered. Even after two years, I guess I had not realized the extent to which the scientists relied on by this administration are willing to ignore what used to be generally known as the “scientific consensus.”
Tag Archives: PM2.5
Last month, I noted that EPA’s Office of Air Quality Planning and Standards had released a draft reassessment of the particulate matter NAAQS. In a bold moment of speculation, I indicated that it would be difficult for EPA to avoid lowering the PM2.5 NAAQS to between 8.0 and 10.0 micrograms/cubic meter. Following issuance of the draft, and in order to ensure that EPA does not ignore the emerging scientific consensus,… More
EPA’s Office of Air Quality Planning and Standards has released a draft of its reassessment of the adequacy of the current national ambient air quality standard for particulate matter. Here’s the primary takeaway concerning PM2.5:
The risk assessment estimates that the current primary PM2.5 standards could allow a substantial number of PM2.5-associated deaths in the U.S.
When taken together, we reach the preliminary conclusion that the available scientific evidence,… More
EPA’s Latest Particulate Review Shows Impacts Below the Current NAAQS. How Will Trump Avoid Doing Something About It?
Last week, EPA posted its draft Integrated Science Assessment for Particulate Matter. It’s the foundational document for EPA’s periodic review of its National Ambient Air Quality Standard for PM. The current standard for PM2.5, promulgated in 2012, is 12 ug/m3.
Section 109 of the Clean Air Act requires the Administrator to set the NAAQS “requisite to protect the public health” with “an adequate margin of safety.”
The new ISA states that:
Evidence from U.S.… More
As regular readers know, the tension between guidance and regulation is one of my favorite topics. My view is that, in general, guidance is too often used simply to avoid notice and comment rulemaking and that, once issued, it is treated by those implementing it in the agency street-level bureaucracy as though it were a rule. Nonetheless, guidance is sometimes appropriate. The recent decision in Sierra Club v.… More
On Friday, the Court of Appeals for the District of Columbia Circuit rejected EPA’s approach to implementation of the PM2.5 NAAQS. The fine particulate NAAQS was first published in 1997, and EPA issued implementation rules in 2007 and 2008. Those rules specified that EPA Subpart 1 of Part D of title I of the CAA – the general implementation provisions – rather than Subpart 4, which applies specifically to PM10. … More
1. Because, in 2009, the District of Columbia Court of Appeals rejected EPA’s prior effort to keep the PM2.5 standard at 15 ug/m3.
The batting average of the Bush administration EPA in appeals of its regulatory proposals may now have dropped below the proverbial Mendoza line. This week, the Court of Appeals for the District of Columbia remanded a substantial part of EPA’s particulate rule. That the Bush administration could achieve results where the Mendoza line is even a close metaphor is a testament to just how low its stock has fallen in the courts.… More