Laws & Regulations
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Volkswagen Light Duty Diesel Vehicle Violations for Model Years 2009-2016
This site provides information on EPA's issued notice of violation (NOV) of the Clean Air Act (CAA) to Volkswagen. The NOV alleges software that circumvents EPA emissions standards for certain air pollutants.
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Fiat Chrysler Automobile Diesel Vehicle Violations
Vehicle violations by Fiat Chrysler Automobiles to the Clean Air Act (CAA).
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Explosives Manufacturing Effluent Guidelines
Overview and documents for Explosives Manufacturing Effluent Guidelines (40 CFR Part 457).
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Metal Molding and Casting (Foundries) Effluent Guidelines
Overview and documents pertaining to Metal Molding and Casting (Foundries) Effluent Guidelines (40 CFR Part 464)
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Metal Products and Machinery Effluent Guidelines
Federal Register notices and support documents for Metal Products and Machinery Effluent Guidelines and Standards, 40 CFR Part 438
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Porcelain Enameling Effluent Guidelines
Overview and support documents for Porcelain Enameling Effluent Guidelines regulations, 40 CFR Part 466
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Leavenworth Asphalt Materials, LLC - Clean Water Act Public Notice
The EPA is providing notice of a proposed Administrative Penalty Assessment in the form of an Expedited Settlement Agreement (“ESA”) against Leavenworth Asphalt Materials, LLC for alleged violations at the Leavenworth, Kansas facility.
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Extension of the Reformulated Gasoline Program to the Phoenix, Arizona Moderate Ozone Non-attainment Area Additional Resources
EPA is issuing a final rule today to revise the reformulated gasoline (RFG) regulations to include the Phoenix, Arizona moderate ozone nonattainment area in the federal RFG Program.
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Extension of the Reformulated Gasoline Program to Maine’s Southern Counties
This final rule is based on a request from the Governor of the State of Maine for areas within the ozone transport region established under CAA section 184.
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Extension of the Reformulated Gasoline Program to the East St. Louis, Illinois Ozone Non-attainment Area
This Final Rule responds to the Governor of Illinois’ July 10, 2006, request to have the Illinois portion of the St. Louis, Illinois-Missouri ozone nonattainment area opt into the Federal RFG program.
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E15 Fuel Partial Waivers
Federal Registers and fact sheets on partial waiver for E15 for use in light-duty motor vehicles are gathered.
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Direct Final Rule: Modifications to Standards and Requirements for Reformulated and Conventional Gasoline Including Butane Blenders and Attest Engagements Additional Resources
Supporting documents on EPA's direct final rule on several modifications to the reformulated gasoline (RFG) and conventional gasoline regulations.
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EPA Documents for the Arizona Section 303(d) List of Impaired Waters
EPA partial approval and partial disapproval of Arizona’s 2020 List of Impaired Waters. EPA found Arizona’s decision not to list two waters was inconsistent with the provisions of Arizona’s water quality standards for methylmercury in fish tissue.
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Direct Final Rule Approving Relaxation of Summer Gasoline Volatility Standard for Grant Parish Area
EPA is taking direct final action to relax the federal volatility (RVP) standard applicable to summer gasoline supplied to the Grand Parish, Louisiana area from 7.8 pounds per square inch (psi) to 9.0 psi.
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Alternative Test Method for Olefins in Gasoline
This action proposes to allow for an additional alternative test method for olefins in gasoline, ASTM D6550-05. The allowance of this additional alternative test method will provide more flexibility to the regulated industry.
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Data
A landing page for EPA data resources. Discover data assets, understand data policy, and how EPA manages and governs data.
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Alternative Test Method for Olefins in Gasoline
This page summaries the final rule for Alternative Test Method for Olefins in Gasoline.
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Relaxation of Summer Gasoline Volatility Standard for Florida and the Raleigh-Durham-Chapel Hill Area (Triangle Area) and the Greensboro/Winston-Salem/High Point Area (Triad Area) in North Carolina
The EPA is taking final action to relax the federal volatility (RVP) standard applicable to summer gasoline supplied to three areas in Florida and the Triangle and Triad Areas in North Carolina from 7.8 pounds per square inch (psi) to 9.0 psi.
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District of Columbia SIP: Negative Declarations - VOC Source Categories
District of Columbia SIP - EPA Approved non -regulatory and quasi-regulatory material
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Relaxation of Summer Gasoline Volatility Standard for Jefferson and Shelby counties, Alabama (“the Birmingham area”) Final action
The EPA is taking final action to relax the federal volatility (RVP) standard applicable to gasoline supplied to the Birmingham area from 7.8 pounds per square inch (psi) to 9.0 psi during the summer ozone season.