By Andrew H. Perellis and Patrick D. Joyce

Supreme CourtIn a 5-4 ruling, the U.S. Supreme Court today ruled that the EPA acted unreasonably when it refused to consider the cost of implementing its Mercury and Air Toxics Standard (MATS).

The MATS rule, issued in 2012, established emissions limits from power plants for mercury, filterable particulate matter, and hydrogen chloride. 

Continue Reading Supreme Court: EPA Must Consider Cost Of Implementing Regulations

By Jeryl L. Olson, Eric E. Boyd, and Craig B. Simonsen

The U.S. Environmental Protection Agency (EPA) will hold two public hearings on its proposed updates to the national ambient air quality standards (NAAQS) for fine particle pollution. 

Concerning the primary standards for fine particles (generally referring to particles less than or equal to 2.5 micrometers (mm) in diameter (PM2.5))

Continue Reading EPA to Hold Public Hearings on Proposed Fine Particulate Matter Standard