Laws & Regulations

NPDES Permit for Whidbey Island Naval Air Station Ault Field Wastewater Treatment Plant in Washington

EPA's NPDES wastewater permit for the Whidbey Island Naval Air Station Ault Field wastewater treatment plant in Oak Harbor, Washington.

Conformity Adequacy Review: Region 5

Resources are for air quality and transportation government and community leaders. Information on the conformity SIP adequacy/inadequacy of state implementation plans (SIPs) in EPA Region 5 (IL, IN, MI, OH, WI) is provided here.

Vehicle Emissions Inspection and Maintenance (I/M): General Information and Regulations

Access to inspection and maintenance information (I/M) and on-board diagnostic (OBD) analysis.

Transportation Conformity: Chronological List of Rulemakings

State and Local Transportation Resources are for air quality and transportation government and community leaders. Conformity rulemakings published before July 1, 2004 are included here.

Conformity Adequacy Review: Region 1

Resources are for air quality and transportation government and community leaders. Information on the adequacy/inadequacy of state implementation plans (SIPs) in EPA Region 1 (CT, ME, MA, NH, RI, VT) is provided here.

Conformity Adequacy Review: Region 3

Resources are for air quality and transportation government and community leaders. Information on the adequacy/inadequacy of state implementation plans (SIPs) in EPA Region 3 (DE, DC, MD, PA, VA, WV) is provided here.

NACEPT Assumable Waters Subcommittee Final Report (May 10, 2017)

Transmittal memo to Administrator Pruitt of of the Subcommittee's recommendations.

Hazardous Substance Designations and Release Notifications

Provides an overview and information on CERCLA Section 103 release notification.

Frequent Questions about the Implementation Study of R2 and e-Stewards Certification Programs

Frequent Questions about the Implementation Study of R2 & e-Stewards® Certification Programs

Sustainable Materials Management (SMM) Electronics Challenge: Recognition and Awards

Information on EPA's SMM Electronic Challenge award winners and participants.

Rounds 1 and 2 Datasets for the Unregulated Contaminant Monitoring Program Managed by State Drinking Water Programs

This page contains data about Unregulated Contaminant Monitoring from State drinking water programs

Hazardous Waste Electronic Manifest System Advisory Board Virtual Meeting: September 23-25, 2025

This page is for the September 2024 e-manifest advisory board meeting.

Inert Reassessment Document for Polybutanes - CAS No. 9003-29-6

Polybutanes are used as lubricating-oil additives, polymer modifiers, and viscosity index improvers.

Inert Ingredients - Reassessment Decision Documents: P

Find completed inert ingredient tolerance reassessment decision documents starting with P

Inert Ingredients - Reassessment Decision Documents: G

Find completed inert ingredient tolerance reassessment decision documents starting with G.

Inert Ingredients - Reassessment Decision Documents: E

Find completed inert ingredient tolerance reassessment decision documents starting with E.

Cumulative Risk Assessment Under the Toxic Substances Control Act

Fenceline Screening Methodology

Copperhead Gas Plant

MRV Plan and Decision documents for the Copperhead Gas Plant, reporting under Subpart RR to GHGRP

EPA, state and local leaders celebrate Brownfields Grant for redevelopment in Brunswick, Darien and Statesboro 

Release Date: August 21, 2025

CA0000018: Vessel Testing a Pilot OceanWell off the Coast of California in Federal Waters

Documents related to proposed NPDES Permit for Vessel Testing a Pilot OceanWell located off the coast of California in federal waters. The permit proposes to authorize freshwater and brine intermittent discharges from a desalination module into the Pacific