Laws & Regulations
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Compensatory Mitigation for Losses of Aquatic Resources under CWA Section 404 (Final Rule)
These regulations are designed to improve the effectiveness of compensatory mitigation to replace lost aquatic resource functions and area, and increase the efficiency and predictability of the mitigation project review process.
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Memorandum: Individual Permit Flexibility for Small Landowners under CWA Section 404
This policy clarifies permit flexibility afforded to small landowners under Section 404 of the Clean Water Act
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Memorandum: Appropriate Level of Analysis Required for Evaluating Compliance with the CWA Section 404(b)(1) Guidelines Alternatives Requirements
Memorandum to clarify the appropriate level of analysis required for evaluating compliance with the Clean Water Act Section 404(b)(1) Guidelines' requirements for consideration of alternatives. 40 CFR 230.10(a)
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1979 "Civiletti" Memorandum under CWA Section 404(f)
US Attorney General opinion on ultimate administrative authority under Section 404 to determine the reach of navigable waters and the meaning of Clean Water Act Section 404(f).
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Frequent Questions on Removal of Obsolete Dams
The Applicability of EPA Regulations and Funding to the Removal of Obsolete Dams: Frequently Asked Questions
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Overview of CWA Section 404: Regulatory Authority Factsheet
Section 404 of the Clean Water Act (CWA) establishes a program to regulate the discharge of dredged or fill material into waters of the United States, including wetlands.
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Clean Water Act Section 403: Ocean Discharge Criteria
Clean Water Act Section 403 Ocean Discharge Criteria
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Memorandum for the Field: Special Emphasis Given to Coral Reef Protection under the Clean Water Act, Marine Protection, Research, and Sanctuaries Act, Rivers and Harbors Act, and Federal Project Authorities
Special Emphasis Given to Coral Reef Protection under the Clean Water Act, Marine Protection, Research, and Sanctuaries Act, Rivers and Harbors Act, and Federal Project Authorities
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Post-IRA 2022 Reference Case
This area provides information and documentation on EPA’s power sector modeling platform v6, including the associated input data and modeling assumptions, outputs, and documentation.
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EPA's Power Sector Modeling Platform v6 using IPM Summer 2021 Reference Case
This area provides information and documentation on EPA’s power sector modeling platform v6, including the associated input data and modeling assumptions, outputs, and documentation.
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Exporting United States Vehicles or Engines
Information about the requirements for exporting a United States-version vehicle or engine to another country.
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2023 Reference Case
This area provides information and documentation on EPA’s power sector modeling platform v6, including the associated input data and modeling assumptions, outputs, and documentation.
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Draft Guidance on Plantwide Applicability Limitation Provisions Under the New Source Review Regulations
In this draft guidance, EPA addresses specific concerns raised by stakeholders regarding the use of plantwide applicability limitations (PALs) in the New Source Review permitting program.
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Programs & Progress
Learn about the progress made through EPA's Clean Air Markets Programs and find links to progress reports, emissions trends, and additional resources.
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Addition of 1-BP (nPB) to the Clean Air Act List of Hazardous Air Pollutants
Fact sheet and pre-publication version of the notice to grant petitions to add n-propyl bromide to the list of hazardous air pollutants
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GD 17 - "Normal Load" for Performance Specification 2
GD 17 - "Normal Load" for Performance Specification 2
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1997 Ozone National Ambient Air Quality Standards (NAAQS) Nonattainment Actions
Read about the relevant nonattainment actions pertaining to the implementation of the 1997 Ozone NAAQS. Find the text of the rules, fact sheets, docket folders, and supporting documents.
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Information from the Border Center about Requirements for Importers and Exporters of Vehicles, Engines and Fuels
Information from the Border Center about Requirements for Importers and Exporters of Vehicles, Engines and Fuels.
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1997 Ozone National Ambient Air Quality Standards (NAAQS) Infrastructure Actions
Read about the EPA's infrastructure actions for the 1997 Ozone NAAQS. These actions are regarding states' failure to submit SIPs addressing various parts of the standards. Here you can read the federal register notices, fact sheets, and the docket folder.
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2008 Ozone National Ambient Air Quality Standards (NAAQS) Infrastructure Actions
Read about the EPA's infrastructure actions for the 2008 Ozone NAAQS. These actions are regarding states' failure to submit SIPs addressing various parts of the standards. Here you can read the federal register notices, fact sheets, and the docket folder.