Laws & Regulations
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Final Rule to Extend the Effective Date for Removal of Gasoline Volatility Waiver for Ohio and Nine Counties in South Dakota
Environmental Protection Agency is renewing the extension of the effective date of the removal of the 1-psi volatility waiver for gasoline-ethanol blends containing 10 percent ethanol in Ohio and nine counties in South Dakota.
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Comparison of Dredged Material to Reference Sediment under CWA Section 404(b)(1)
Comparison of Dredged Material to Reference Sediment: Summary
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Overview of the Transportation Equity Act for the 21st Century (TEA-21)
The Transportation Equity Act for the 21st Century (TEA-21) authorizes over $200 billion to improve the Nation's transportation infrastructure, enhance economic growth and protect the environment.
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Inland Testing Manual under CWA Section 404
The Inland Testing Manual is national guidance used for the evaluation of dredged material for inland disposal under the CWA to determine acceptability of material to be disposed.
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Exemptions to Permit Requirements under CWA Section 404
These exemptions pertain to "normal farming" and harvesting activities that are part of an established, ongoing farming or forestry operations.
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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