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United States

Reconsideration of Interpretation of Regulations that Determine Pollutants Covered by Clean Air Act Permitting Programs -- Final Rule

This document is part of the New Source Review Policy & Guidance Database.
Supplemental PSD Applicability Determination for Cyprus Casa Grande Corporation Copper Mining and Processing Facilities

This document is part of the New Source Review Policy & Guidance Database.
Offset Credit for G.M. Plant in Shreveport, LA

This document is part of the New Source Review Policy & Guidance Database.
Whirlpool Corporation in Fort Smith, Arkansas

This document is part of the New Source Review Policy & Guidance Database.
Permit Amendment for International Paper in Nacogdoches Co., Texas -- PSD-TX-766M1

This document is part of the New Source Review Policy & Guidance Database.
Opinion in U.S. vs. Louisiana-Pacific Corporation. D. Colo. -- Interpreting Certain PSD Regulations

This document is part of the New Source Review Policy & Guidance Database.
PSD Applicability Determination on Commenced Construction

This document is part of the New Source Review Policy & Guidance Database.
Emissions from Rocket Firing at Test Stands -- Fugitive or Point Source Emissions

This document is part of the New Source Review Policy & Guidance Database.
Rochester Public Utilities Silver Lake Plant -- Steam Line Modification

This document is part of the New Source Review Policy & Guidance Database.
Semiconductor Manufacturing GHG PSD Applicability -- Use of PAE and PAL's

This document is part of the New Source Review Policy & Guidance Database.
Site Specific Determination of Common Control at United Technologies Corporation, Columbus, GA

This document is part of the New Source Review Policy & Guidance Database.
Applicability of PSD to Watertown Power Plant in South Dakota -- Shut Down for 9 Years

This document is part of the New Source Review Policy & Guidance Database.
Wheeling-Pittsburgh Steel Corporation, Monessen Coke Battery No. 1 -- Evaluation of Corporation Proposed Rehabilitation and NSR Applicability Determination

This document is part of the New Source Review Policy & Guidance Database.
PSD Applicability -- Asphalt Concrete

This document is part of the New Source Review Policy & Guidance Database.
Current Class VI Projects under Review at EPA

Current Class VI Projects at EPA
Global Change Explorer

GCX is a collection of EPA research products (tools, data, and approaches) relevant to global change impact assessments and response planning for those impacts.
Meteorological Data - Weather Stations

Interactive US map providing links to data files of 1961-1990 daily and hourly meteorological data available for meteorological data collection stations across US States & Territories
Proposal to Reduce Ethylene Oxide Emissions from Commercial Sterilization Facilities

On April 11, 2023, the U.S. Environmental Protection Agency (EPA) announced a proposal to significantly reduce emissions ethylene oxide (EtO) from commercial sterilization facilities
Other Clean Water Act Test Methods: Chemical

Methods for analysis of chemical pollutants in wastewater. These methods are not approved under 40 CFR Part 136, but may be of interest to regulated entities, permitting authorities and the public.
Municipal Resources

This page serves as a guide to municipal resources such as funding, technical assistance, helpful webinars, and workshops for local governments.

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