• Center for Disease Control & Prevention (CDC) - Health Topic: Water Quality


• Coastal Water Quality (NOAA): Nonpoint Source Pollution and Erosion Comparison Tool (N-SPECT)


• Cooperative State Research, Education, and Extension Service (CSREES) - National Water Quality Program


• Environmental Working Group (EWG) - Dedicated to protecting citizens from the effects of pesticides and other toxic chemicals.


• Environmental Protection Agency (EPA):
  • Annual Drinking Water Quality Reports: The national primary drinking water regulations require large community water systems serving a population greater than 100,000 to post the current year's water quality report to a publicly-accessible site on the Internet. Some of those systems have posted the reports to EPA's Office of Ground Water and Drinking Water Web site for annual water quality reports (listed geographically).
  • Drinking Water Research Information Network (DRINK) is a portal to information on projects funded or performed by water research organizations, government agencies in the U.S., international research organizations, and academic institutions focused on drinking water issues. It is a compilation of drinking water project information from partner organizations that creates a single source of information on ongoing research.
  • STORET - STORET (short for STOrage and RETrieval), EPA's largest computerized environmental data system, is a repository for water quality, biological, and physical data and is used by state environmental agencies, EPA and other federal agencies, universities, private citizens, and many others.
  • Water Quality Standards Database - This Web site provides access to several WQS reports that provide information about designated uses, waterbody names, state numeric water quality criteria, and EPA recommended numeric water quality criteria. The WQSDB allows users the ability to compare WQS information across the nation using standard reports.
  • Water Science "...applying science & technology to protect water quality." The Office of Science and Technology (OST) is responsible for developing sound, scientifically defensible standards, criteria, advisories, guidelines, limitations and standards guidelines under the Clean Water Act and the Safe Drinking Water Act. OST is also responsible for developing risk assessment methodologies and for providing risk assessment support for the Office of Water in the U.S. Environmental Protection Agency.


• Methods and Data Comparability Board - The 'Methods Board' is a partnership of water-quality experts from federal agencies, states, tribes, municipalities, industry, and private organizations who all share a commitment to developing water-quality monitoring approaches that facilitate collaboration and comparability amongst all data-gathering organizations.


• National Water Quality Monitoring Council (NWQMC) Provide national coordination to implement the Strategy to Improve Water-Quality Monitoring in the United States. Develop water-quality information.


• New England Insterstate Water Pollution Control Commission


• Rural Community Assistance Partnership


• Standard Methods for the Examination of Water and Wastewater Hard copy available at WRCA, call no. R 41.4 J9-2 (most recent version on Reference Shelf).


• TMDL information sponsored by America's Clean Water Foundation and the Association of State and Interstate Water Pollution Control Administrators


• Water Information Sharing and Analysis Center (WaterISAC) is the most comprehensive and up-to-the-minute online resource of security information for America’s drinking and wastewater utilities.


• UC Water Quality Program - University of California Water Resources Center


• Water Quality of San Francisco Bay U.S. Geological Survey


• Water Quality Information Center


• Water Quality Association An international non-profit trade association serving the POU/POE water treatment industry.