About EPA

EPA Deputy Administrator

Biography of EPA's Deputy Administrator.

Investments in Electric and Low-emission School Buses

Learn about EPA's Infrastructure Investment and Jobs Act funding for healthier air for school children, including investments in electric and reduced carbon school buses.

Framework for Ecological Risk Assessment

This is the first step in a long-term effort to develop risk assessment guidelines for ecological effects. Its primary purpose is to offer a simple, flexible structure for conducting and evaluating ecological risk assessment within EPA.

Guiding Principles for Monte Carlo Analysis

EPA's 1997 policy for using Monte Carlo analysis for analyzing variability and uncertainty in risk assessments.

Guidelines for Neurotoxicity Risk Assessment

These Guidelines set forth principles and procedures to guide EPA scientists in evaluating environmental contaminants that may pose neurotoxic risks, and inform Agency decision makers and the public about these procedures.

Guidelines for Ecological Risk Assessment

1998 guidelines are provided to improve the quality and consistency of EPA's ecological risk assessments.

FAQs About Update of Standard Default Exposure Factors

This guidance supersedes and replaces certain portions of OSWER Directive 9285 .6-03.

Request for Correction: Herculaneum Lead Smelter Site, Herculaneum, MO

Information received for request for correction submitted on behalf of Herculaneum Lead Smelter Site, Herculaneum, Missouri

About the Acting Administrator for EPA's Region 9 Office in San Francisco

Biography of Josh F.W. Cook, who serves as the Regional Administrator for the U.S. Environmental Protection Agency’s Region 9 based in San Francisco, California.

EPA Pacific Southwest (Region 9) Laboratory Regional Science Council (RSC)

EPA Region 9 Laboratory Regional Science Council Contacts.

Respuesta ante el incendio de baterías de Vistra, Moss Landing: Preguntas frecuentes

Preguntas frecuentes sobre la respuesta ante el incendio de baterías de Vistra, Moss Landing.

Legal Settlements in Arizona

Collection of legal settlements related to civil administrative penalty proceedings in Arizona.

September—October 2021 Newsletter

Check out our newsletter for stories on the EPA Administrator’s visits to Arizona and California, an environmental justice partnership in California, Children’s Health Month, a plan for addressing “forever chemicals” and more!

Administrator Lee Zeldin Travels to Los Angeles to Survey Wildfire Rebuilding Efforts, View Seizure of Illegal Pesticides, and Highlight Agency Effort to Reduce Food Waste

On Wednesday, June 24, 2026, EPA Administrator Lee Zeldin visited Los Angeles, California, to spotlight agency commitments on reducing food waste, wildfire rebuilding efforts, stopping illegal pesticides, and wastewater reclamation.

Release Date: July 2, 2026