Laws & Regulations
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Manufacturer-Run In-Use Testing Program Data for Heavy-Duty Diesel Engines – Test Order Year 2017
This page provides manufacturer-run in-use testing program data from heavy-duty diesel engine manufacturers in compliance with 40 CFR 86 Subpart T for Test Year 2017.
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Light-duty Vehicle Greenhouse Gas Program Technical Amendments
EPA finalizes two technical corrections to the Light-duty Vehicle Greenhouse Gas (GHG) Emissions Standards Regulations.
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Regulations for Emissions from Marine Spark-Ignition Engines
EPA standards for exhaust and evaporative emissions reduce the environmental impact from marine spark-ignition engines and vessels.
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Heavy-Duty Highway Powertrain Family Naming Conventions
This page provides the engine family naming convention for heavy-duty powertrain families.
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EPA’s Marine Remanufacturing Program: Maintaining Compliance when Rebuilding Category 1 and 2 Marine Diesel Engines
EPA maintains a list of remanufacture systems, or “kits”, certified for use with Category 1 and 2 marine diesel engines according to the provisions of 40 CFR Part 1042, Subpart I, and is periodically updated.
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Reporting Templates for Light-Duty Greenhouse Gas (GHG) Standards
Manufacturers must submit greenhouse gas certification and reporting data through EV-CIS, formerly Verify, EPA’s engine and vehicle compliance information system.
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Heavy-Duty Highway Tractors and Vocational Vehicles: Family Naming Conventions
How to create Positions 5-12 of your Engine Family name for Complete Heavy-Duty Highway Vehicles (tractors and vocational vehicles >14,000 pounds GVWR).
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Information about Family Naming Conventions for Vehicles and Engines
Family naming conventions overview, find applicable model year code, determine your manufacturer code, and find you industry sector.
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Publicly Owned Treatment Works General Permit (POTW GP) for Massachusetts & New Hampshire
Documents, links & contacts for the Notice of Availability of the final National Pollutant Discharge Elimination System (NPDES) General Permits for the Discharge of Wastewater from Certain Publicly Owned Treatment Works Treatment Plants (POTW).
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Expired Remediation General Permits for Massachusetts & New Hampshire
Information and documents from expired Remediation General Permits for Massachusetts and New Hampshire.
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Regional Haze Rule Revisions Early Engagement Public Webinar
Learn about webinars covering the EPA's Regional Haze Rule Revision.
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Basics of SIP Requirements
SIP basics
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Interim Davis Bacon Act Guidance
wage and fringe benefits guidance for contractors and subcontractor
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Pesticide Active Ingredient Production Industry: National Emission Standards for Hazardous Air Pollutants (NESHAP)
This action promulgates national emission standards for hazardous air pollutants (NESHAP) for the pesticide active ingredient (PAI) production source category under section 112 of the Clean Air Act as amended (CAA or Act).
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Chromium Electroplating: National Emission Standards for Hazardous Air Pollutants
Includes rule history, Federal Register citations, and implementation information for 40 CFR 63 Subpart N.
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Sulfur Dioxide (SO2) Designations Round 3: South Carolina State Recommendation and EPA Response
South Carolina recommendation for Round 3 area designations and EPA's response.
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Sulfur Dioxide (SO2) Designations Round 3: Puerto Rico Recommendation and EPA Response
Puerto Rico recommendation for Round 3 area designations and EPA's response.
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Sulfur Dioxide (SO2) Designations Round 3: Maryland State Recommendation and EPA Response
Maryland recommendation for Round 3 area designations and EPA's response.
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Sulfur Dioxide (SO2) Designations Round 3: Louisiana State Recommendation and EPA Response
Louisiana recommendation for Round 3 area designations and EPA's response.
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Steam Electric Power Generating Effluent Guidelines - Rule Reconsideration
Overview and documents pertaining to reconsideration of the 2015 final rule for the Steam Electric Effluent Guidelines regulation (40 CFR Part 423).