Science & Technology

Common Effects Methodology Regional Stakeholder Meeting January 11 -22, 2010

EPA is exploring how to build on the substantial high quality science developed under both OPP programs to develop additional tools and approaches to support a consistent and common set of effects characterization methods using best available information.

Fact Sheet: Estuarine and Coastal Marine Waters - Bioassessment and Biocriteria Technical Guidance

Fact Sheet: Estuarine and Coastal Marine Waters: Bioassessment and Biocriteria Technical Guidance

Biological Water Quality Criteria

Page contains links to Technical Documents pertaining to Biological Water Quality Criteria, including, technical assistance documents for states, tribes and territories, program overviews, and case studies.

Non-attainment in Maine: Problem Identification and Solution

Case Studies: Using bioassessments and biocriteria to identify impaired waters and causes of impairment

Support for Permit Limits in Ohio

Fact Sheet: Methodology for Deriving Ambient Water Quality Criteria for the Protection of Human Health - Revised Methodology (2000)

Final Recommended Aquatic Life Ambient Water Quality Criteria for Diazinon

Information related to Final Recommended Aquatic Life Ambient Water Quality Criteria for Diazinon.

Learn About the Toxic Substances Control Act (TSCA)

This page provides an overview of TSCA authorities as well as specific sections of TSCA.

EPA Releases Draft Revised TSCA Risk Determination for 1,4-Dioxane

EPA announces its draft revised risk determination for 1,4-dioxane in July 2023 available for public comment until September 2023.

EPA Releases Draft Supplement to the Risk Evaluation for 1,4-Dioxane

EPA announces the release of the 2023 draft supplement to the 2020 risk evaluation for 1,4-dioxane for public comment and peer review.

Water Filter Education Handouts

EPA and its partners have developed educational resources to help community members properly use and maintain water filters, including a toolkit and handouts.

CGEM Example Files

Example files are available to facilitate user familiarity with CGEM model setup.

CGEM Documentation

User guides and model theory documentation.

Citing CGEM

CGEM citings

CGEM Release Notes

CGEM release notes

CGEM Download

CGEM Installers are provided. You will need to have knowledge on how to install software on your target operating system.

National Emission Standards for Aerospace Manufacturing and Rework Facilities (Subpart GG) - Guidance Document

2023 Appendix W Proposed Rule

On October 12, 2023, the Administrator signed a propose rule that revises the Guideline on Air Quality Models. This webpage provides the background material related to this proposed rule for stakeholder reference.

BWR139

Blackwater NWR (BWR139) CASTNET site location,

BUF603

Buffalo (BUF603) CASTNET site location,