Laws & Regulations

Substitutes in Residential and Light Commercial Air Conditioning and Heat Pumps

This page contains a searchable/filterable/sortable table of substitutes listed acceptable for use in residential and light commercial air conditioning and heat pumps.

Substitutes in Non-Mechanical Heat Transfer Systems

This page contains a searchable/filterable/sortable table of substitutes listed acceptable for use in non-mechanical heat transfer systems.

EPA Proposes Plan to Step Up Groundwater Cleanup at San Fernando Valley Superfund Site, Increasing Supply of Safe Drinking Water

U.S. Environmental Protection Agency (EPA) has released a proposed plan to address a contaminated groundwater plume at the San Fernando Valley (Area 2) Superfund site, located near Glendale, CA. EPA is seeking public input on the plan through April 14th.

Release Date: March 16, 2026

MPRSA Ocean Site Monitoring and Management

The EPA is responsible for managing all designated ocean sites. Surveys are conducted to identify appropriate locations for ocean sites and to monitor the impacts of regulated dumping at the ocean sites.

Substitutes in MVAC: Passenger Air Conditioning in Buses and Trains

This page contains a searchable/filterable/sortable table of substitutes listed acceptable for passenger air conditioning in buses and trains.

Fact Sheet: Performance-Based Cleanup and Disposal Under Section 761.61(b)

This fact sheet describes changes to the federal polychlorinated biphenyl (PCB) regulations at 40 Code of Federal Regulations part 761 that went into effect on February 26, 2024, which amended the performance-based disposal option for PCB remediation.

Substitutes in MVAC: Passenger Air Conditioning in Light-Duty, Medium-Duty, Heavy-Duty and Off-Road Vehicles

This page contains a searchable/filterable/sortable table of substitutes listed acceptable for passenger air conditioning in light duty cars and trucks.

Substitutes in Industrial Process Refrigeration

This page contains a searchable/filterable/sortable table of substitutes listed acceptable for use in industrial process refrigeration.

Substitutes in Industrial Process Air Conditioning

This page contains a searchable/filterable/sortable table of substitutes listed acceptable for use in industrial process air conditioning.

2006 National Ambient Air Quality Standards (NAAQS) for Particulate Matter (PM2.5)

learn more about the 2006 primary and secondary particulate matter National Ambient Air Quality Standards for PM2.5 and PM10 by reading the rule summary, rule history, and supporting documents

Sulfur Dioxide (SO2) Primary Air Quality Standards - Litigation Associated with Current Review

Litigation associated with the current NAAQS review may involve schedules for the review as well as challenges to the final decisions, and court decisions in these matters.

Nitrogen Dioxide (NO2) Primary Air Quality Standards - Litigation Associated with Current Review

Litigation associated with the current NAAQS review may involve schedules for the review as well as challenges to the final decisions, and court decisions in these matters.

Substitutes in Ice Skating Rinks

This page contains a searchable/filterable/sortable table of substitutes listed acceptable for use in ice skating rinks.

Laboratory Services and Applied Science Division

The state-of-the-art laboratory is occupied by by the Region 4 Science and Ecosystem Support Division (SESD).

Third-Party High Performance Building Certifications at EPA

This page contains a list of Third-Party High Performance Building Certifications at EPA.

Substitutes in Commercial Ice Machines

This page contains a searchable/filterable/sortable table of substitutes listed acceptable for use in commercial ice machines.

Cross-Media Electronic Reporting Rule (CROMERR)

Cross-Media Electronic Reporting Regulation (CROMERR) sets performance-based, technology-neutral standards for systems that states, tribes, and local governments use to receive electronic reports from facilities they regulate under EPA-authorized programs.