Science & Technology

Particulate Matter (PM) Standards - Planning Documents from Current Review

Scientific and technical planning documents used to review and develop the particulate matter national ambient air quality standard.

Sulfur Dioxide (SO2) Primary Air Quality Standards - Federal Register Notices from Current Review

Federal Register notices used to review and develop new sulfur dioxide (SO2) primary standards

Sulfur Dioxide (SO2) Primary Standards - Planning Documents from Current Review

Scientific and technical planning documents used to review and develop new sulfur dioxide primary national ambient air quality standards.

International Emissions Inventory Conference

Emission inventory conference forum for exchange of ideas

National Research Programs

EPA's Office of Research and Development supports six research programs that identify the most pressing environmental health research needs with input from EPA offices, partners, and stakeholders.

Lake Michigan Mass Balance Results and Publications

Mass Balance Results and Publications for Lake Michigan

Supplementary Training Materials for Aquatic Life Criteria - Copper - Monitoring and Assessment Issues

FAQs about monitoring and assessment issues to help states, Tribes, permittees and other interested stakeholders implement the Aquatic Life Ambient Water Quality Criteria for Copper.

Supplementary Training Materials for Aquatic Life Criteria - Copper - Permitting Issues

FAQs about permitting issues to help states, Tribes, permittees and other interested stakeholders implement the Aquatic Life Ambient Water Quality Criteria for Copper.

EPA Finds Perchloroethylene Poses an Unreasonable Risk to Human Health

Announcing the final unreasonable risk determination for PCE

Contact for Caño Martín Peña (Martín Peña Channel, Puerto Rico)

Contact person for the Martin Pena Channel location

News about South Platte Watershed

NDWAC 2015 Recommendations to the Administrator for the Long Term Revisions to the Lead and Copper Rule (LCR) and Past Meeting Summaries

The NDWAC Lead and Copper Rule Working Group was formed to provide advice to EPA in considering Long-Term Revisions to the Lead and Copper Rule.

This page is about the METRO tool that is part of the Global Climate Explorer set of tools using an ESRI map to display the data. It was taken offline in 2021 to be released by a newer tool. See the 2017 Final Report for more details on using METRO.

Supplementary Training Materials for Aquatic Life Criteria - Copper

Supplementary training materials developed to help states, Tribes, permittees and other interested stakeholders implement the Aquatic Life Ambient Water Quality Criteria for Copper.

EPA Published Research Related to the Hydraulic Fracturing Study

A list of publications that will support the draft assessment report on the potential impacts of hydraulic fracturing on drinking water resources. These publications have undergone peer review through the journal where the paper has been published.

National Recommended Water Quality Criteria from 2004

Presents national recommended water quality criteria for 120 priority and 45 non-priority toxic pollutants. Also includes criteria for 23 organoleptic effects.

RFR 21005A - Request for Reconsideration; Received 6/10/2022

RFR 21005A - Chloroprene and supporting exhibits

EPA Response to RFC 22001 - GenX Chemicals Toxicity Assessment

EPA’s response to Request for Correction submitted on March 18, 2002 regarding the Final Human Health Toxicity Values for Hexafluoropropylene Oxide (HFPO) Dimer Acid and Its Ammonium Salt (CASRN 13252-13-6 and CASRN 62037-80-3) Also Known GenX chemicals

Guidance for Preparing Standard Operating Procedures

Provides information about preparing standard operating procedures (SOPs).