Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

JavaScript appears to be disabled on this computer. Please click here to see any active alerts.

Laws & Regulations

Replacement Units (Under the 2003 Rule)

Explanation of Replacement Units
Applicability Determination Regarding the Proposed Replacement and Reconfiguration of the High Pressure Section of Two Steam Turbines at Detroit Edison's Monroe Power 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. Some documents in
Leading with Green Infrastructure in Louisville

The Louisville Metropolitan Sewer District developed a plan including green and gray infrastructure to meet the requirements of their 2005 consent decree and 2009 amended version.
Current Status and Planned Updates of TRI Tools

A list of tools containing TRI data, indicating when they were last updated and when the next planned update will occur.
EPA's Response to Eastman Chemical Company's Request that EPA Reconsider Prior Source Determinations

This document is part of the NSR Policy and Guidance Database and the Ttile V Policy and Guidance Database
Availability of Emission Offset Credits from Cinergy's Noblesville 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.
Determining Baseline Emissions at Mississippi Power Company's Watson Electric 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.
BP American Production Company's Florida River Compression Facility Single Source Determination

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.
De minimis Values for NOx RACT

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.
Administrator's Decision on PSD Issue -- Review of New Source's Ability to Meet BACT

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.
Determining the Ambient Air Boundary for Potential Permit Application in Support of Alaska Industrial Development and Export Authority's Restart of Healy Clean Coal 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 Request For EPA-Region I's Determination on the Applicability of it's Regulations and the Clean Air Act Amendments of 1990 to the Montachusett Regional Recycling Facility

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. Some documents in
TSCA Section 5(a)(3)(C) Determination 505 for Premanufacture Number (PMN) P-20-0168

This document describes EPA's pre-manufacture notice review determination under amended TSCA for P-20-0168.
TSCA Section 5(a)(3)(C) Determination 508 for J-21-0004

This document describes EPA's Microbial Commercial Activity Notice (MCAN) review determination under amended TSCA for J-21-0004.
EPA to recognize $7.7 million grant to The Mississippi Band of Choctaw Indians for greenhouse gas (GHG) reduction measures

EPA News Release: EPA to recognize $7.7 million grant to The Mississippi Band of Choctaw Indians for greenhouse gas (GHG) reduction measures
- Release Date: October 30, 2024
TSCA Section 5(a)(3)(C) Determination for J-21-0012

This document describes EPA's Microbial Commercial Activity Notice (MCAN) review determination under amended TSCA for J-21-0012.
Regulatory and Guidance Information by Topic: Land and Cleanup

Regulatory information about land and cleanup topics, including aboveground storage tanks, brownfields, RCRA corrective action, superfund, and underground storage tanks (USTs).
Correspondence and Guides Regarding the Chesapeake Bay TMDL

Correspondence between EPA and the jurisdictions (Delaware, District of Columbia, Maryland, New York, Pennsylvania, Virginia and West Virginia) during the development of the Chesapeake Bay TMDL.
Chesapeake Bay Watershed Implementation Plans (WIPs)

This page provides an overview of Watershed Implementation Plans (WIP) and how they play an important role in restoring the Chesapeake Bay. The page also provides links to each jurisdiction's Phase I, II, and III WIP.
Washington County Lead District National Priorities List (NPL) Superfund Sites: Furnace Creek, Old Mines, Potosi and Richwoods; Washington County, Missouri – Fact Sheet, January 2023

Site Update: Lead Testing and Cleanup Opportunity