Government: Agencies: Independent: Environmental Protection Agency: Water

• Regional: United States: Science and Environment: Water 

• EPA: Acid Rain  - Provides information about acid rain and its effects on ecosystems in the United States.
• EPA: Biological Indicators of Watershed Health  - Discusses what bioindicators are with details of species and programs overview.
• EPA: National Estuary Program  - Explains the nature of the program with profiles and advises to take care of the estuaries.
• EPA: Surf Your Watershed  - Provides a listing of environmental sites, watershed locator, and overview of the program called Adopt your Watershed.
• EPA: Wetlands  - Explains why wetlands are important in the environment with overview on how these are protected through the programs.
• Monitoring and Assessing Water Quality  - Features water quality reports with information on the events and the efforts of the agency.