Bergeson & Campbell, P.C.

Legal Lookout: EPA Staff Urges Changes in PM Standards

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Courtesy of Courtesy of Bergeson & Campbell, P.C.

Earlier this year, EPA staff scientists urged agency management to revise the current particulate matter (PM) standards for fine particles and the inhalable portion of coarse particles, based on evidence that suggests to EPA scientists that more protection is needed than is provided under current air standards.


The Clean Air Act (CAA) requires that EPA periodically review its National Ambient Air Quality Standards. EPA has established primary and secondary air standards under the CAA. Primary standards are those designed to protect public health with an adequate margin of safety. Secondary standards are designed to protect against so-called “welfare” effects, including ecological damage, visibility impairment (haze), and damage to materials.

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