Laws & Regulations

Deleted National Priorities List (NPL) Sites - by Deletion Date

View a list of Superfund sites deleted from the NPL, ordered chronologically by deletion date.

Data Management within the Region 5 Remedial Program

Learn from an EPA region 5 memo providing an evaluation of how we receive, store, and process data to allow for the cataloging, interpreting, and publishing of very large amounts of data efficiently and consistently.

Data Management and Communication at Residential Properties

Learn from an EPA region 5 memo about expectations for communicating residential sample results and the resources available to aid in those efforts.

Construction Completions at NPL Sites - by State

View a list of NPL sites at which construction has been completed, organized by state and territory. Use the interactive map for quick access.

Construction Completions at National Priorities List Sites - by Site Name

View a list of NPL sites at which construction has been completed, ordered alphabetically by Site Name.

Construction Completions at National Priorities List (NPL) Sites - by Number

View a list of NPL sites at which construction has been completed, ordered chronologically by Construction Completion Number.

Close Out Procedures for National Priorities List Superfund Sites

Use this guidance for the process of accomplishing remedial action completion, construction completion, site completion, partial deletion and site deletion for NPL sites.

Cleaning up Superfund Sites

Links for each phase of the complex process of cleaning up Superfund sites.

Background Indoor Air Concentrations of Volatile Organic Compounds in North American Residences (1990 – 2005): A Compilation of Statistics for Assessing Vapor Intrusion

This technical report presents a summary of indoor air studies that measured background concentrations of VOCs in the indoor air of thousands of North American residences and an evaluation and compilation of their reported statistical information.

Proposed National Priorities List (NPL) Sites - by State

Provides maps and information about sites proposed to the NPL by state, region, and site.

Partial Deletions at NPL Sites - by State

View the list of partial deletions at NPL Sites organized by state. Use the interactive map to jump to a state or territory.

Mongoose Amine Treating Facility

MRV Plan and Decision document for Mongoose Amine Treating Facility

2018 Proposal to Revise Section 608 Refrigerant Management Regulations

Proposed Rule for the Protection of Stratospheric Ozone: Revisions to the Refrigerant Management Program’s Extension to Substitutes.

Definitions of Section 608 Terms

Provides definitions of key terms used in Section 608 of the Clean Air Act.

EPA Begins Hazardous Substances Removal from Former Omni Polymers Facility in Toledo, Ohio

The U.S. Environmental Protection Agency (EPA) has begun the cleanup of hazardous substances at the former Omni Polymers facility located at 1925 Nebraska Ave. in Toledo, Ohio. The cleanup is expected to be completed by spring 2026.

Release Date: September 9, 2025