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Historical Multi-Pollutant Analyses

Information provided for informational purposes only Unless otherwise noted, the data presented throughout this Web site reflect EPA’s 2003 modeling and analysis of the Clear Skies Act of 2003. Clear Skies legislation was intended to create a mandatory program that would dramatically reduce power plant emissions of sulfur dioxide (SO2), nitrogen oxides (NOx), and mercury by setting a national cap on each pollutant. The Clear Skies bill was proposed in response to a growing need for an emission reduction plan that will protect human health and the environment while providing regulatory certainty to the industry. The proposed legislation for air regulation never moved out of the Senate Environment and Public Works committee in 2005 and was therefore never enacted.

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Various multi-pollutant proposals designed to reduce emissions from the power sector have been introduced in the Senate this decade. EPA agreed to perform detailed analyses for these legislative proposals starting in 2003 in response to Senate requests. That information, along with analysis of EPA's regulatory approach to reducing emissions from the power sector, is provided on this web site. These analyses are based on air quality, health benefits, and power sector modeling projections and estimates through 2025. EPA uses the Integrated Planning Model (IPM) to analyze the impact of air emissions policies on the U.S. electric power sector.

October 2005 EPA Multi-Pollutant Analyses

The following analyses were performed using IPM prior to EPA's last comprehensive update to the model. For documentation on EPA's use of the IPM model for the analyses listed below, please visit Past EPA Modeling Applications Using The Integrated Planning Model.

The following legislative proposals were modeled:

  1. Clean Air Planning Act (Carper, S.843 in 108th Congress)
  2. Clean Power Act (Jeffords, S.150 in 109th Congress)
  3. Clear Skies Act of 2005 (Inhofe, S.131 in 109th Congress)
  4. Clear Skies Act of 2003 (Inhofe/Voinovich at the Administration's request, S.485 in 108th Congress)
  5. Clear Skies Manager's Mark (of S.131 above)

In addition, EPA modeled three federal regulations finalized in 2005 as a sixth analysis:

News release about EPA Administrator Steve Johnson's release of the analyses


Summaries of the Analyses:


The six analyses and additional supporting materials are presented here:

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Natural Gas Price Sensitivity Analysis


Power Sector Modeling Supporting Materials1


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Air Quality Modeling Supporting Materials


Excel Viewer

Benefits Modeling Supporting Materials


Carbon Dioxide Provisions of S. 843 Analysis Supporting Materials


2002 EPA Multi-Pollutant Analyses


1 For simplification: The Clean Power Act (Jeffords, S.150 in 109th) = "Jeffords", The Clean Air Planning Act (Carper, S.843 in 108th) = "Carper", The Clear Skies Act of 2005 (Inhofe, S.131 in 109th) = "CSA 2005: Inhofe", The Clear Skies Act of 2003 (Inhofe, S.485 in 108th) = "CSA 2003", The Clear Skies Act of 2005 (Manager's Mark of S.131 in 109th) = "CSA 2005: MM", The Clean Air Interstate Rule, The Clear Air Mercury Rule, and The Clean Air Visibility Rule (2005) = "CAIR/CAMR/CAVR."

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