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| EnviroScience Biomonitoring specialist offering services in aquatic surveys, lake management, GPS/GIS services and more. |   |
| USGS Water Resources Provides water resources information from the US Geological Survey. |   | |
| Aquatic Ecology Page Provider of guide to aquatic life and ecology interests on the Internet. |   | |
| Office of Water - EPA Provider of information and resources about the protection of rivers, wetlands, lakes and coastal and ocean waters. |   | |
| American Aquatics Environmental firm specializing in assessing aquatic ecosystems. |   | |
| Journal of Aquatic Ecosystem Stress and Recovery International journal emphasizing the integrated relationship between environmental stressors and the integrity of aquatic ecosystems. |   | |
| Water's Edge Scientific LLC Provider of environmental consulting firm services specializing in biological aspects of water quality. |   | |
| Surfers Against Sewage Non-profit organization campaigning to end the discharge of raw & partially treated sewage and toxic waste into oceans and inland waters. |   | |
| Bioindicators of Aquatic Ecosystem Stress Assesses the effects that environmental stressors such as contaminants have on the health of aquatic organisms, populations and communities. |   | |
| Watershed Co. Environmental consulting firm specializing in the evaluation and rehabilitation of rivers, lakes, streams ands and wildlife habitats. |   | |
| Athena Technologies Provider of geological and environmental services to industry and academia. |   | |
| Envirotech Consultants Provider of project and permit management and mitigation plans for wetlands and habitat restoration. |   | |
| Water Environment International Consulting services on the water environmental aspects of international development, focusing primarily on Asia and Africa. |   | |
| British Waterways: The Waterways Challenge Educational and environmental activities program to show students how to investigate waterway plants, animals and habitats that can be seen in local canals. |   | |
| Center for Environmental Law & Policy Protects and restores the natural integrity and enjoyment of Washington's waters through education and outreach, public interest litigation and advocacy, and policy research. |   | |
| Ken's Fishing Haven Presents information on the deterioration of fishing in Singapore due to sprawling urbanization and habitat disturbance. |   | |
| Florida Center for Environmental Studies (CES) Collects, analyzes, and promotes the use of scientifically-sound information concerning tropical and subtropical freshwater ecosystems. |   | |
| Center for Aquatic and Invasive Plants Multidisciplinary research, teaching and extension unit devoted to the study and management of freshwater aquatic and invasive plants. |   | |
| Limnos Oy Supplier of equipment for research institutes, consulting engineers, environmental authorities and schools for water and sediment studies. |   | |
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