Science & Technology
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Known Issues, Data Notes, and Revisions
Detailed List of Corrections to eGRID data
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Technical Resources
Page contains the technical resources associated with eGRID.
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Overview of the Clean Air Act and Air Pollution
The Clean Air Act (CAA) has helped with air pollution and you can find information on the progress made, how the law works and challenges to overcome.
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Cross-State Air Pollution
The Cross-State Air Pollution Rule (CSAPR), requires states to significantly improve air quality by reducing power plant emissions that contribute to ozone and/or fine particle pollution in other states.
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Analysis of the Final MATS Risk and Technology Review (RTR)
IPM analyses of the Proposed MATS Risk and Technology Review (RTR)
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Results using Pre-IRA 2022 Reference Case
Download EPA's IPM v6 including documentation, overview, System Summary Report, .DAT, .RPE, .RPT files, Gas Report, State Level Emissions, Generation and Heat Input Summary.
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Supporting Documentation of the 2015 Ozone NAAQS Actions
IPM analyses of the Good Neighbor Plan.
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Results using 2023 Reference Case
Download EPA's IPM v6 including documentation, overview, System Summary Report, .DAT, .RPE, .RPT files, Gas Report, State Level Emissions, Generation and Heat Input Summary.
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SF6 Leak Monitoring Webcast
Overview of leak monitoring systems to identify SF6 emissions from high voltage electrical equipment.
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SF6 Gas Inventory Webcast
Overview of managing SF6 gas inventories.
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eGRID2018 Notes
Describes the data corrections made in eGRID2018v2.
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Petitions for Reconsideration Received for the CSAPR Update
EPA has received petitions for reconsideration of the Cross-State Air Pollution Rule Update for the 2008 Ozone NAAQS from the following stakeholders.
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Responses to 40 CFR Part 75 Petitions - 2015
Find responses to petitions submitted by affected units subject to 40 CFR Part 75 in 2015.
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Responses to 40 CFR Part 75 Petitions - 2010
Find responses to petitions submitted by affected units subject to 40 CFR Part 75 in 2010.
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Virtual and Field Audit Resources
The Continuous Emissions Monitoring System (CEMS) Field Audit Manual details recommended procedures for conducting a field audit of a Part 75 monitoring system. Included are tools can use to prepare for an audit.
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Responses to 40 CFR Part 75 Petitions - 2007
Find responses to petitions submitted by affected units subject to 40 CFR Part 75 in 2007.
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Power Plants and Neighboring Communities Graphs
Graphs that display the relationship between power plants and the surrounding communities
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Part 75 Testing Notifications and Reports
Provides information on submitting notifications to EPA and states under Part 75 regulations. https://www.epa.gov/node/277573/edit#edit-group-javascript
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CHP's Role in Decarbonization
Learn about CHP benefits, including increased efficiency, reduced emissions of greenhouse gases and other air pollutants, energy cost savings, and enhanced energy reliability.
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Resources Supporting ISA Development
These related resources support the development and decision making of the ISAs.