Science & Technology

Using Taxon-Environment Relationships: Assign Operational Taxonomic Units

Step instructions for assigning operational taxonomic units.

Computing Inferences: Weighted Average Inferences

This page describes a weighted average approach for inferring environmental conditions.

Estimating Taxon-Environment Relationships: Parametric Regressions

This page describes the parametric regression approach to estimating species-environment relationship.

Using Taxon-Environment Relationships: Compute Biological Inferences

Step instructions for computing inferred environmental conditions.

SSD Plots

Species sensitivity distributions, cadmium, LC50, ECOTOX, arthropod

PECBO Appendix Introduction: Theory

Provides underlying theory for species-environment relationships

Data Analysis Topics (A-Z)

This is an a to z list of data analysis topics which are part of volume 4: data analysis

R Script: Non-Parametric Regression

How to Fit Non-Parametric Curves to Observations

Estimating Taxon-Environment Relationships: Placing Taxa into Tolerance Categories

Describes approach for placing species into categories based on species-environment relationships

Estimating Taxon-Environment Relationships: Assessing Model Fit

This page describes several approaches for assessing model fit for species-environment models.

Basic Principles & Issues

More information about methods to control for confounding variables

R Script: Compute Area Under ROC Curve

How to compute the area under the ROC curve in data analysis.

Basic Analyses

Overview of linear regression analysis and questions to consider when using this type of data analysis.

CADStat Installation Instructions

CADStat is a statistical program designed to assist risk assessors with data analysis.

Field Measurement of Oxidation-Reduction Potential

Field branches quality systems and technical procedures

The U.S. Environmental Protection Agency Office of Inspector General today issued a report identifying that the EPA had limited success in getting states to include climate adaptation or related resilience efforts in their clean water state revolving fund

Federal Guidance Report No. 13: CD Supplement

Order a CD from EPA which contains PDFs and other supporting materials related to Federal Guidance Report No. 13, "Cancer Risk Coefficients for Environmental Exposure to Radionuclides."

Data & Data Products: Envirofacts – Toxics Release Inventory (TRI) Explorer Widget

Information about and embed code for EPA's Envirofacts – Toxics Release Inventory (TRI) Explorer Widget

Data & Data Products: Envirofacts – Toxics Release Inventory (TRI) Form R Widget

Information about and embed code for EPA's Envirofacts – Toxics Release Inventory (TRI) Form R Widget