Science & Technology

Guidelines for the Health Risk Assessment of Chemical Mixtures

1986 procedural guide for evaluating data on the health risks from exposures to chemical mixtures.

Documents for Recommended Toxicity Equivalency Factors for Human Health Risk Assessments of Dioxin and Dioxin-Like Compounds

This document describes the U.S. Environmental Protection Agency’s (U.S. EPA’s) updated approach for evaluating the human health risks from exposures to environmental media containing dioxin-like compounds (DLCs).

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 Developmental Toxicity Risk Assessment

1991 issuing of final amended guidelines for assessing the risks for developmental toxicity from exposure to environmental agents.

S-200 OILGONE

Technical product bulletin: this miscellaneous oil spill control agent allows for the product:oil mixture to be removed from the water’s surface using traditional skimming tools.

National Water Quality Values in New Zealand: Policy-Relevant Stated Preference Estimates

This is a working paper titled "National Water Quality Values in New Zealand: Policy-Relevant Stated Preference Estimates"

Working Paper: How Did Air Quality Standards Affect Employment at U.S. Power Plants? The Importance of Stringency, Geography, and Timing

This is a working paper titled "How Did Air Quality Standards Affect Employment at U.S. Power Plants? The Importance of Stringency, Geography, and Timing"

Revitalizing Forest Modeling: Unleashing Molecular Biomarkers for Precision in Climate Change Predictions

The fellow will learn how to translates scientific insights into actionable tools, providing an advanced mathematical modeling framework for characterizing and predicting climate change effects on various ecosystems.

Federal Guidance for Radiation Protection

EPA produces federal guidance technical reports, which standardize dose and risk assessment and issues radiation protection guidance to federal agencies. This page provides links to federal guidance policy recommendations and technical reports.

LaPlace, Louisiana - Memo on Integrated Risk Information System (IRIS) Assessment of Chloroprene

Memo providing information on EPA's 2010 IRIS assessment of chloroprene

LaPlace, Louisiana - Preliminary Risk-Based Concentration Value for Chloroprene in Ambient Air

Memo providing interim recommendations for a risk-based concentration value for chloroprene.

Limitless Potential: Keokuk, Iowa, Aims to Revitalize Old Elkem-Carbide Site

EPA's $2 million grant will help Keokuk achieve its goal of revitalizing an abandoned carbide plant, one of the largest 2023 grants offered by Region 7's Brownfields program.

FOIA Libraries and Repositories

Freedom of Information Act Regional Libraries page contains frequently requested environmental information by region.

EPA completes Hurricane Helene cleanup at Douglas Lake in partnership with federal, state and local agencies

Release Date: July 31, 2025

Two TSCA Environmental Release Applications (TERAs) for Pseudomonas putida (P. Putida)

TERAs submitted by Oak Ridge National Laboratory and given the tracking designations of R-01-0003 and R-01-0004. The microorganisms will be tested at the Ravenna Army Ammunition Plant in Ohio to determine whether they can detect traces of TNT in soil.