Learn the Issues

Chinook Salmon

An assessment of Chinook salmon abundance in the Salish Sea. Part of the U.S. EPA and Environment and Climate Change Canada's Health of the Salish Sea Ecosystem Report.

Marine Species at Risk

An assessment of marine species at risk of extinction in the Salish Sea watershed. Part of the U.S. EPA and Environment and Climate Change Canada's Health of the Salish Sea Ecosystem Report.

Quileute Tribe Water Monitoring Program

Learn about the Quileute Tribe's water monitoring program for the Quillayute River in Washington.

Sewersheds

Water Infrastructure and Capacity Assessment Tool

Indicators Used in the National Aquatic Resource Surveys

National Aquatic Resource Surveys use biological, physical, chemical and recreational indicators of water quality.

Macrophytes are aquatic plants growing in or near water. They may be either emergent (i.e., with upright portions above the water surface), submerged, or floating. Examples of macrophytes include cattails, hydrilla, water hyacinth, and duckweed.

National Rivers and Streams Assessment 2008-2009 Report

PDF of the NRSA 2008-2009 final report

Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2019

View or download the Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2019, including individual chapters and annexes.

EPA Approves New WIFIA Loans to Strengthen Drinking Water and Wastewater Infrastructure in Oregon and Washington

EPA is announcing its approval of three Water Infrastructure Finance and Innovation Act (WIFIA) loans totaling $240 million to improve vital water infrastructure.

Release Date: December 18, 2025

Amendments to the List of Hazardous Air Pollutants (HAP) of Section 112(b) of the Clean Air Act (CAA)

Initial List of Hazardous Air Pollutants with Modifications

U.S. Government’s International Methane Mitigation Activities: 2021 Accomplishments

The U.S. Government’s Global Methane Initiative Accomplishments ANNUAL REPORT (2021)

U.S. Government’s International Methane Mitigation Activities: 2020 Accomplishments

The U.S. Government’s Global Methane Initiative Accomplishments ANNUAL REPORT (2020)

U.S. Government GMI Accomplishments: 2016 Annual Report

The U.S. Government’s Global Methane Initiative Accomplishments report 2016

Success Stories about Restoring and Protecting Water Bodies Impaired by Nonpoint Source Pollution

General background, purpose regarding nonpoint source success stories. Includes the latest guidance for success story format.

Frequent Questions about Closeouts

EPA policy defines a closeout as the systematic process by which EPA determines that all required technical work under a grant or cooperative agreement has been completed by the recipient and EPA, and all applicable administrative requirements are met.