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IPM Analysis of the Final Mercury and Air Toxics Standards (MATS)

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On December 16, 2011, EPA signed a Notice of Final Rulemaking for the Mercury and Air Toxics Standards (MATS). EPA analyzed the impact of MATS on the U.S. electric power sector using version 4.10_MATS of the Integrated Planning Model (IPM). From this page you can download documentation for IPM v4.10_MATS, the "NEEDS" database of electric generation unit records used in the modeling, and the IPM run results files.

IPM Analysis of the proposed Toxics Rule on the U.S. electric power sector.

Documentation: Updates to EPA Base Case v4.10_MATS

EPA Base Case v4.10_MATS is the IPM version that EPA used to analyze the Final MATS. To learn more about the v4.10_MATS assumptions, see the link below. EPA Base Case v4.10_MATS builds on the last major update to the IPM model, EPA Base Case v4.10, as well as two subsequent updates: Updates to EPA Base Case v410_PTox and Updates to EPA Base Case v4.10_FTransport.

Please note that the documentation for v4.10_MATS (presenting new modeling capabilities and updated input assumptions) supplements the more comprehensive documentation of EPA's IPM Base Case v4.10 and the two updates to that document noted above.

National Electric Energy Data System (NEEDS) v4.10_MATS

The National Electric Energy Data System or "NEEDS" database contains the generation unit records used to construct the "model" plants that represent existing and planned/committed units in EPA modeling applications of IPM. NEEDS includes basic geographic, operating, air emissions, and other data on these generating units. The following link provides access to the updated version of NEEDS used in modeling the proposed Toxics Rule.

IPM Results: IPM Run Files

Download IPM run files for the MATS analysis using the links in the table below. Click on the IPM run name in the first column of the table below to download a file. The files are posted in one of two formats, a zipped archive or an excel spreadsheet, and contain the following:

IPM Run Files

IPM Run Name

IPM Run Description

MATS Base Case

Base case model run, including the national Title IV SO2 cap-and-trade program; NOX SIP Call regional ozone season cap-and-trade program; Cross-State Air Pollution Rule (CSAPR) as finalized in July 2011; and settlements and state rules through December 2010 impacting SO2, NOx, directly emitted PM and CO2. This run represents conditions without MATS. (Zip 7 MB)

MATS Policy Case

This run models the MATS described in the preamble. (Zip 7 MB)

Notice of Final Rulemaking for MATS

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