Collections and Lists
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Children's Health Research regarding Asthma
EPA is conducting research to investigate the causes of childhood asthma. Recent evidence implicates air pollution as a factor.
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Case Studies about Mercury Cleanups at Schools
case studies of typical problems, incidents and cleanups related to mercury spills found in schools throughout the United States
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WebCMS Training
EPA builds all web public content in the WebCMS (release notes for the latest update). Content built in the WebCMS is not visible to the public until the review process is complete, and the content is published.
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Exploratory Data Analysis
Intro to exploratory data analysis. Overview of variable distributions, scatter plots, correlation analysis, GIS datasets. Use of conditional probability to examine stressor levels and impairment. Exploring correlations among multiple stressors.
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Selecting an Analysis Approach
An approach for selecting statistical analyses to inform causal analysis. Describes methods for determining whether test site conditions differ from reference expectations. Describes an approach for estimating stressor-response relationships.
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Basic Principles & Issues
Interpreting p-values and confidence intervals
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PECBO Appendix: Site Map
Site map for finding content in the PECBO Appendix, PECBO stands for "predicting environmental conditions from biological observations."
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Download Software
Overview of the data analysis tools available for download on CADDIS. Provides instructions for downloading and installing CADStat, access to Microsoft Excel macro for computing SSDs, a brief overview of command line use of R, a statistical software.
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PECBO Appendix Introduction: Module Organization
Table of contents for PECBO Module
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Using R to Compute the Area Under the ROC Curve
Script for assessing model fit
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PECBO Appendix
Overview of PECBO Module, using scripts to infer environmental conditions from biological observations, statistically estimating species-environment relationships, methods for inferring environmental conditions, statistical scripts in module.
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Basic Analyses
Use of statistical tests to determine if an observation is outside the normal range of expected values. Details of CART, regression analysis, use of quantile regression analysis, CART in causal analysis, simplifying or pruning resulting trees.
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Interactive Conceptual Diagrams (ICDs) User Guide
The Causal Analysis/Diagnosis Decision Information System, or CADDIS, is a website developed to help scientists and engineers in the Regions, States, and Tribes conduct causal assessments in aquatic systems.
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Oklahoma SIP Approved Statutes as of May 11, 2020 (OKd29)
EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Oklahoma SIP
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Basic Information about the NDWAC
Basic information about the NDWAC including its basic responsibilities, charters, and roster.
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International and Other Federal Government Environmental Radiation Monitoring Networks
Learn more about international, federal and state monitoring networks.
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Safe Drinking Water on Tribal Lands
Information on how EPA works with American Indians and Alaska Natives to help their systems to improve access to safe drinking water on tribal lands.
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EPA-Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Oklahoma SIP
EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Oklahoma SIP
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EPA-Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Oklahoma SIP
EPA Approved Oklahoma Source-Specific Requirements
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Stationary Refrigeration and Air Conditioning
Resources for HVACR contractors, technicians, equipment owners and other regulated industry to check rules and requirements for managing refrigerant emissions, information on how to become a certified technician, and compliance assistance documents.