Clean Power Plan Resources

EPA’s Final Standards of Performance Greenhouse Gas Emissions from New, Modified & Reconstructed Electric Generating Units Under section 111(b) of the Clean Air Act

On Aug. 3, 2015, the Environmental Protection Agency (EPA) issued its final rule to regulate greenhouse gas emissions (GHG) from new, modified, and reconstructed electric generating units (EGUs) under Section 111(b) of the Clean Air Act. Specifically, the final rule sets “standards for emissions of carbon dioxide (CO2) for newly constructed, modified, and reconstructed affected fossil fuel-fired…EGUs.” The rule will become effective 60 days after its publication in the Federal Register, which is expected to occur no later than Sept. 4, 2015.

The final rule defines a new source as “any newly constructed fossil fuel-fired power plant that commenced construction on or after Jan. 8, 2014. It defines a modification as “any physical or operational change to an existing source that increases the source’s maximum achievable hourly rate of air pollutant emissions.” The standard for modified sources applies to any units that modify on or after Jan. 18, 2014.

A reconstructed source is defined as “a unit that replaces components to such an extent that the capital cost of the new components exceeds 50 percent of the capital cost of an entirely new comparable facility.” The standard for reconstructed sources would apply to any unit that is reconstructed on or after January 18, 2014.

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EPA’s Final Greenhouse Gas Emissions for Existing Electric Generating Units Under section 111(d) of the Clean Air Act

On June 25, 2013, President Obama issued a memorandum directing the U.S. Environmental Protection Agency (EPA) administrator to issue proposed “standards, regulations, or guidelines, as appropriate that address carbon pollution from modified, reconstructed, and existing power plants…” Regulating carbon dioxide (CO2) from power plants is a central component of the Obama Administration’s efforts to address climate change.

Following the President’s directive, on June 2, 2014, EPA proposed emissions guidelines for CO2 emissions from existing fossil fuel-fired power plants. On Aug. 3, 2015, EPA finalized its greenhouse gas emission guidelines for existing electric generating units (EGUs) under section 111(d) of the Clean Air Act (CAA)-the Clean Power Plan (CPP). The agency asserts that the final emission guidelines (or final rule) will reduce CO2 emissions by 32 percent from 2005 levels by 2030, a steeper decline than the 30 percent cut envisioned by the proposed rule, due largely to a greater decline in coal use and greater use of renewables.

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View the press release on the rule

Clean air news

America’s Generation Capacity, 2016 Update, March 2016

America’s Generation Capacity, 2015 Update, April 2015

Markets Matter: Expect a Bumpy Ride on the Road to Reduced CO2 Emissions, May 2014

Meeting the Challenge: Public Power's Commitment to Reducing Greenhouse Gases

Electricity Markets Not Ready to Fight Climate Change, Public Power Chat, May 19, 2014

Court upholds EPA on cross-state pollution, Public Power Daily, July 25, 2013

Appeals court affirms dismissal of New Source Review case, Public Power Daily, July 24, 2013

Obama directs EPA to issue carbon standards for new an dexisting power plans as part of climate change plan, Public Power Daily, June 26, 2013

APPA supports some parts of Obama's climate change plan, but has concerns about other aspects, Public Power Dailiy, June 26, 2013

APPA moves to support EPA in challenge to RICE emissions standards, Public Power Daily, May 13, 2013

Downwind states sue EPA over approval of Kentucky, Tennessee ozone plans, Public Power Daily, May 8, 2013

White paper looks at process for regulating carbon emissions from existing plants, Public Power Daily, April 26, 2013

EPA faces possible suit to force issuance of greenhouse gas standards for power plants, Public Power Daily, April 19, 2013

Under Clean Air Act, EPA can contest construction project before it is completed, court holds, Public Power Daily, April 2, 2013

Utilities, others ask Supreme Court to review EPA's authority on greenhouse gases, Public Power Daily, April 1, 2013

EIA: SO2 and NOx emissions last year were at lowest levels since 1990, Public Power Daily, Feb. 28, 2013

Other news

View revised EPA inspector's notebook section on SPCC at



For information about environmental issues, APPA members may contact Carolyn Slaughter, Director, Environmental Policy.

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