Data and Tools

Case Study - Disseminating Health Information on Hazards of Prenatal Mercury Exposure

Information related to Develop Risk Communication Programs for Fish and Shellfish Consumption Advisories - Case Study - Disseminating Health Information on Hazards of Prenatal Mercury Exposure

Greenhouse Gas Equivalencies Calculator - Revision History

Describes the updates made to the Greenhouse Gas Equivalencies Calculator since it was first posted on EPA’s website in February 2008.

Learn about Regional SDAMs

Streamflow Duration Assessment Methods are rapid field methods using hydrological, geomorphological, and biological indicators, observable in one site visit, to classify streamflow duration as perennial, intermittent, or ephemeral at the stream reach scale

Radiochemical Sample Collection Information - Query Results

SCID Radiochemical Query Results Page

Pathogen Sample Collection Information - Query Results

SCID Pathigen Query Results Page

Biotoxin Sample Collection Information - Query Results

SCID Biotoxin Query Results Page

Chemical Sample Collection Information - Query Results

SCID Chemical Query Results Page.

Technical Support for Numeric Nutrient Water Quality Criteria Development

Technical Support for Numeric Nutrient Criteria Development

Regional SDAMs FAQs

Answers to some of the most frequently asked questions about Regional SDAMs and how to apply them in the field are listed.

TRI Relative Risk-Based Environmental Indicators: Summary of Comments Received on the Draft 1992 Methodology and Responses to Comment, May 1997

This document contains general comments on the original Indicators methodology, the toxicity weighting, the chronic ecological indicator and other issues. OPPT's responses and proposed changes are also discussed.

User's Manual for OPPT's Risk-Screening Environmental Indicators Model: Version 1.0, November 1999

This manual describes the Indicator methodology, operations of the computer model and the step-by-step processes to perform them, and pre-run queries available with the model.

User's Manual for RSEI Model Version 2.1, December 2002

This manual accompanies version 2.1 of the Risk-Screening Environmental Indicators model.

TRI Relative Risk-Based Environmental Indicators Methodology, June 1997

This report explains how the proposed Indicators are constructed, and includes discussions of the conceptual methodology, data sources, and the computational approach.

Estimate of Stack Heights and Exit Gas Velocities for TRI Facilities in OPPT's Risk-Screening Environmental Indicators Model, June 1999

This document describes the methods used to estimate stack heights and exit gas velocities for TRI facilities