Laws & Regulations
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Steam Electric Power Generating Effluent Guidelines - Postponement of Certain Compliance Dates
2017 final rule postponing compliance dates in the Effluent Guidelines for the Steam Electric Power Generating Category (40 CFR Part 423)
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Steam Electric Power Generating Effluent Guidelines - 2015 Final Rule Documents
Fact sheet and support documents for the 2015 Final Steam Electric Effluent Guidelines rule
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Steam Electric Power Generating Effluent Guidelines - Consultation Documents
Summaries of EPA consultations on the Steam Electric Effluent Guidelines proposed rule (2013) with Indian Tribes and consultations pursuant to the Unfunded Mandates Reform Act and Executive Order 13132 on federalism
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Documents Associated With the PFAS Advance Notice of Proposed Rulemaking
This page contains documents related to the PFAS rulemaking for the OCPSF category.
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Steam Electric Power Generating Effluent Guidelines Background Documents
Background documents related to Steam Electric Power Generating Effluent Guidelines (40 CFR Part 423)
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Steam Electric Power Generating Effluent Guidelines Documents Related to 1978 and 1980 Amendments
Documents for the 1978 & 1980 amendments to the Steam Electric Power Generating Effluent Guidelines (40 CFR Part 423)
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Steam Electric Power Generating Effluent Guidelines Documents Related to 1982 Amendment
Documents for the 1982 amendments to the Steam Electric Power Generating Effluent Guidelines and Standards (40 CFR Part 423)
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Steam Electric Power Generating Effluent Guidelines Documents Related to 1977 Amendment
Documents related to the 1977 amendment to the Steam Electric Power Generating Effluent Guidelines (40 CFR Part 423)
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Steam Electric Power Generating Effluent Guidelines Documents Related to 1974 Initial Rulemaking
Documents supporting the 1974 initial rulemaking for Steam Electric Power Generating Effluent Guidelines (40 CFR Part 423)
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Airport Deicing Effluent Guidelines Documents
Documents related to Airport Deicing Effluent Guidelines
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Policy and Technical Guidance
EPA provides information on voluntary mobile source emission reduction policies when innovative strategies are used to reduce air pollution from cars, trucks and other transportation sources.
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April 2022 Alternative RFS Compliance Demonstration Approach for Certain Small Refineries
EPA denies petitions from small refinery exemptions and provides an alternative approach to demonstrate compliance.
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April 2022 Denial of Petitions for RFS Small Refinery Exemptions
EPA denies all pending small refinery exemptions (SRE) petitions under the Renewable Fuel Standard (RFS) program.
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Description and History of the MOBILE Highway Vehicle Emission Factor Model
MOBILE is an EPA model for estimating pollution from highway vehicles. It has been superseded by the Motor Vehicle Emission Simulator (MOVES). MOBILE calculates emissions of hydrocarbons (HC), oxides of nitrogen (NOx) and carbon monoxide (CO).
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Statement on 2.0-Liter Diesel Vehicles
Volkswagen submits initial proposal for addressing defeat devices in its 2.0 liter diesel vehicles.
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VW DERA Option for Tribes Supporting Documents
VW Settlement DERA options fact sheets for tribes
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Certification Materials for Marine SI Engines/Equipment
Use these tutorials as part of certification for nonroad spark-ignition engines.
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Certification Materials for Nonroad Spark-Ignition (NRSI) Evaporative Components/Equipment
Use these files for nonroad evaporative certification in EV-CIS.
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Report Forms and Guidance for Defects and Recalls under 40 CFR Part 85, Subparts S and T
Forms and step-by-step guidance as part of the compliance reporting process for defects and recalls under 40 CFR Part 85, subparts S and T.
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Certification Materials for Small Nonroad Spark-Ignition (NRSI) Engines/Equipment
Use this template for small SI certification in EV-CIS.