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NSR


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…


What Coal Generators Should Know About the EPA’s Proposed ACE Rule

The Environmental Protection Agency’s (EPA’s) Affordable Clean Energy (ACE) rule is proposed to replace the 2015 Clean Power Plan—which the Supreme Court stayed in February 2016 and never went into…


Duke Energy to Shutter Three Coal Units, Resolve Drawn-Out Clean Air Act Lawsuit

Duke Energy has settled a 15-year-old lawsuit for allegedly violating the Clean Air Act when it made modifications at 13 coal-fired power units in North Carolina.  The Environmental Protection Agency’s…


NSR Settlement Requires New Pollution Controls for Four Corners Coal Plant

Several Arizona and New Mexico–based utilities will be required to install pollution controls at the coal-fired Four Corners Power Plant to curb sulfur dioxide (SO2) and nitrogen oxide (NOx) under…


THE BIG PICTURE: Emissions Enforcement