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Laws & Regulations

EPA’s Response to the Petitions to Reconsider the Endangerment and Cause or Contribute Findings for Greenhouse Gases Under Section 202(a) of the Clean Air Act

View the individual sections of EPA's Response to the Petitions to Reconsider the Endangerment and Cause or Contribute Findings for Greenhouse Gases under Section 202(a) of the Clean Air Act.
UIC Permit and Aquifer Exemption for Willow Field, Payette County, Idaho

EPA's Class II-Disposal underground injection control permit for well DJS 2-14 at Willow Field in Payette County, Idaho.
EPA Approved Air Quality Regulations for Guam

EPA-approved air quality implementation plans (SIPs, FIPs, TIPs) in Guam.
Base Realignment and Closure Act Sites

This page provides information and links regarding the EPA's work on base realignment and closure (BRAC).
Current Membership of Human Studies Review Board

HSRB membership list
Proposed Renewable Fuel Standards for 2026 and 2027

EPA announces a proposed rule to establish required Renewable Fuel Standard volumes and percentage standards for 2026 and 2027, also to partially waive the 2025 cellulosic biofuel volume requirement and revise the associated percentage standard.
2020 Petition Requesting the Administrator Object to Title V Permit for Oxbow Calcining

This document is part of the Title V Petition Database.
Interpreting "Adjacent" for New Source Review and Title V Source Determinations in All Industries Other Than Oil and Gas

This document is part of the NSR and Title V Policy and Guidance Databases
Review of De minimis Emissions - Sanctions

This document may be of assistance in applying the New Source Review (NSR) air permitting regulations including the Prevention of Significant Deterioration (PSD) requirements.
Request For Guidance in Drafting a SIP Deficiency Notice For Michigan's Nonattainment New Source Review Program

This document may be of assistance in applying the New Source Review (NSR) air permitting regulations including the Prevention of Significant Deterioration (PSD) requirements. This document is part of the NSR Policy and Guidance Database.
Response to Request for Determination as to whether EPA's "Emission Offset" Policy (41 FR 55525) Applies to FEA's Strategic Petroleum Reserve Program

This document may be of assistance in applying the New Source Review (NSR) air permitting regulations including the Prevention of Significant Deterioration (PSD) requirements.
Emission Offset Exemptions for RRF's

This document may be of assistance in applying the New Source Review (NSR) air permitting regulations including the Prevention of Significant Deterioration (PSD) requirements. This document is part of the NSR Policy and Guidance Database.
Use of Banked ERC's as Both External Offsets and Reasonable Further Progress Reductions

permit
Evaluating Process Changes and the Impact on Emissions at Holcim's Ada, Oklahoma Plant

This document may be of assistance in applying the New Source Review (NSR) air permitting regulations including the Prevention of Significant Deterioration (PSD) requirements. This document is part of the NSR Policy and Guidance Database.
IPALCO's Proposed Patriot, Indiana Generating Station

This document may be of assistance in applying the New Source Review (NSR) air permitting regulations including the Prevention of Significant Deterioration (PSD) requirements. This document is part of the NSR Policy and Guidance Database.
Policy Determination on Limiting Potential to Emit for Koch Refining Company's Clean Fuels Project

This document may be of assistance in applying the New Source Review (NSR) air permitting regulations including the Prevention of Significant Deterioration (PSD) requirements. This document is part of the NSR Policy and Guidance Database.
Response to Letter Regarding the Louisiana Department of Environmental Protection's Position on the PSD Significant Emission Level for ODS at Existing Major Sources

This document may be of assistance in applying the New Source Review (NSR) air permitting regulations including the Prevention of Significant Deterioration (PSD) requirements. This document is part of the NSR Policy and Guidance Database.
Operational Guidance on Control Technology for New and Modified MWC's

This document may be of assistance in applying the New Source Review (NSR) air permitting regulations including the Prevention of Significant Deterioration (PSD) requirements. This document is part of the NSR Policy and Guidance Database.
Federal Enforceability of State's Existing Minor New Source Review (NSR) Programs

This document may be of assistance in applying the New Source Review (NSR) air permitting regulations including the Prevention of Significant Deterioration (PSD) requirements. This document is part of the NSR Policy and Guidance Database.
New York's SIP for NSR

This document may be of assistance in applying the New Source Review (NSR) air permitting regulations including the Prevention of Significant Deterioration (PSD) requirements. This document is part of the NSR Policy and Guidance Database.

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