Laws & Regulations
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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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Proposed CSAPR Close-Out
This page includes information on the determination regarding Good Neighbor Obligations for the 2008 Ozone National Ambient Air Quality Standard.
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Cross-State Air Pollution Revisions Rules
Revisions and adjustments made to the Cross-State Air Pollution Rule
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NOx Ozone Season Group 3 Trading Program under the Revised Cross-State Air Pollution Rule (CSAPR) Update
Revised CSAPR Update 2021 dates
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Cross-State Air Pollution Rule (CSAPR) State Budgets, Variability Limits, and Assurance Provisions
These updated tables incorporate all adjustments finalized in the Supplemental Notice of Final Rulemaking (December 2011), the February Revisions Rule (February 7, 2012), and the June Revisions Rule (June 5, 2012) for the CSAPR for SO2, NOx and Ozone
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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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Cross-State Air Pollution Final and Proposed Rules
Final and Proposed rules for the Cross-State Air Pollution rule including regulatory actions and supporting documentation.
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Potential GNP EGU Allowance Auction Rule
EPA is considering a proposed rulemaking that would add an allowance auction mechanism for power plants to the CSAPR NOX Ozone Season Group 3 trading program under the Good Neighbor Plan (GNP) for the 2015 Ozone NAAQS.
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States that are Affected by the Cross-State Air Pollution Rule (CSAPR)
This table contains information regarding different states' emissions requirements for the Cross-State Air Pollution Rule.
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EPA Authorizes Red Lake Nation to Set Water Quality Standards at Reservation in Minnesota
APPROVAL OF THE Red Lake Band of Chippewa Indians
APPLICATION FOR TREATMENT IN A SIMILAR MANNER AS A STATE FOR THE CLEAN WATER ACT SECTIONS 303(c) WATER QUALITY STANDARDS AND 401 CERTIFICATION PROGRAMS -
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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Summary of Grants Pass Carbon Monoxide (CO) 2nd 10-year Limited Maintenance Plan
Summary of Grants Pass Carbon Monoxide (CO) 2nd 10-year Limited Maintenance Plan under the Oregon air quality State Implementation Plan (SIP).
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Summary of Lakeview PM-10 Maintenance Plan
Summary of Lakeview PM-10 Maintenance Plan under the Oregon air quality State Implementation Plan (SIP).
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EPA Approved Regulations in the Swinomish TIP
EPA-approved regulations that have been incorporated by reference into the Swinomish air quality Tribal Implementation Plan (TIP) in Washington.
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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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2013 SO2 Allowance Auction
Learn the results of EPA's 2013 Acid Rain Program sulfur dioxide (SO2) allowance auction results.