Learn the Issues

Monitoring Plan for Part 75 Sources

Learn about monitoring plan data, which defines relationships between stacks, pipes and units, specifies location of monitors, and identifies equipment used.

Underground Storage Tank Corrective Action Training

Find trainings that provide underground storage tank (UST) stakeholders with information about cleaning up UST releases.

Fact Sheet: Final Rule 25 - Listing of Substitutes under the Significant New Alternatives Policy Program in Refrigeration, Air Conditioning, and Fire Suppression

Section 612 provides that EPA must prohibit the use of a substitute where EPA has determined that there are other available or potentially available substitutes that pose less overall risk to human health and the environment.

Essential Principles for Reform of Chemicals Management Legislation

The Essential Principles for Reform of Chemicals Management Legislation (Principles) are provided to help inform efforts underway in Congress to reauthorize and significantly strengthen the effectiveness of TSCA.

Overview of National Research Council Toxicity Testing Strategy

Review and proposal by the National Research Council (NRC) on long range vision and strategy for toxicity testing that incorporates emerging methods and technologies.

Basic Information on Nutrient Pollution

Learn more about nutrient pollution and the challenges associated with it.

Data & Tools

List of the major data tools and resources used by the Clean Air Markets Programs.

Emissions Monitoring and Reporting

Learn how to provide complete and accurate monitoring, reporting, and auditing of sulfur dioxide (SO20, carbon dioxide (CO2), nitrogen oxide (NOx), and mercury (Hg) emissions.

Clean Air Markets API Portal

Clean Air Markets Application Programming Interface (API) developer documentation

Power Sector Data

List of the major power sector emissions data, tools, and resources used by the Clean Air Markets Programs.

Overview of the CCL 6 Approach

Contains a brief summary of the three-step process used to select CCL 5 contaminants.

Building Bridges: EPA’s First Visit to the Lumbee Tribe Connects Senior Leaders with Chairman John Lowery

Release Date: April 2, 2026

Photos of Lakes Before and After Algal Blooms

Nutrient pollution can cause algal blooms that are sometimes toxic and always unsightly. The photos on this page show lakes and ponds around the country that have been impacted by this environmental problem.

US EPA SmartWay License Agreement

This SmartWay Tractor and Trailer trademark license agreement is for manufacturers who intend to display the SmartWay designated logo (brand) in the interior of eligible trucks and trailers (e.g. having met the SmartWay specifications established by EPA).