Learn the Issues

Calculating EHS quantities within landfills

How are the quantities of the extremely hazardous substances (EHSs) to be calculated in determining if landfills are subject to the section 302 requirements? EPA realizes the practical problems presented for landfills in complying with the Title III requirements. Owners of these facilities must determine, based on reasonably available information…

Last published: March 10, 2026

Previous Air Toxics Assessments

Listing of air toxics assessments conducted in prior years

为英语水平有限者提供援助

Simplified Chinese translation of web page on "Assisting individuals with Limited English Proficiency

Nitrogen Dioxide (NO2) Pollution

Information on setting and implementing the primary outdoor air quality standard for nitrogen dioxide.

Particle Pollution and Your Patients' Health

This web area will offer health care providers a broad base of information on the exposure and health effects of fine particle pollution.

Tribal Policy Documents

Tribal Policy Document for NAAQS Designations

Enforcement and Compliance Assurance Annual Results for FY 2025: Federal Facilities

2025 enforcement and compliance annual results

Enforcement and Compliance Assurance Annual Results for FY 2025: Superfund Cleanup Enforcement

2025 enforcement and compliance annual results

Enforcement and Compliance Assurance Annual Results for FY 2025: Criminal Enforcement

2025 enforcement and compliance annual results

Superfund Accomplishments and Benefits

Learn about Superfund program highlights, including annual accomplishments, performance measures, community benefits, and the Human Exposure Dashboard.

Superfund

EPA’s Superfund program is responsible for cleaning up some of the nation’s most contaminated land and responding to environmental emergencies, oil spills and natural disasters in order to protect public health and the environment.