|

NAAQS


EPA Retains Soot Standards; Drastic PM Reductions Already Achieved, Industry Says
emissions-carbon-dioxide

In a significant but controversial final action, the Environmental Protection Agency (EPA) on Dec. 7 retained its existing National Ambient Air Quality Standards (NAAQS) for both fine and coarse particulate…


THE BIG PICTURE: EPA Regulatory Roundup

Over its 50-year history, several rules issued by the U.S. Environmental Protection Agency (EPA) have reshaped the power sector. But for at least a few modern rules, the road has…


Coal Plants May Get Scrubber Reprieve from Proposed EPA NAAQS Redesignations
emissions-carbon-dioxide

The Environmental Protection Agency (EPA) has moved to redesignate four new areas of Missouri, Nebraska, Ohio, and Texas as being in attainment of air quality standards for sulfur dioxide (SO2). …


EPA Reinterprets ‘Ambient Air,’ Further Tweaks New Source Review 

The Environmental Protection Agency (EPA) has finalized a change to a long-standing policy interpreting “ambient air”—a foundational concept under the Clean Air Act that applies to all types of air…


EPA to Retain Primary NAAQS for Sulfur Dioxide
environmental rule, U.S.,

The Environmental Protection Agency (EPA) will refrain from amending the National Ambient Air Quality Standards (NAAQS) for sulfur dioxide (SO2), retaining a 2010 rule, which it said adequately protects public…