Listservers: email discussion groups

Discussion List for Integrated Catchment Management Practitioners (River Basin Management Society, Australia)
"ICM-L is an e-mail Discussion List to which members can submit messages on Catchment Management to about 600 list members worldwide [...]. You have to be a member to send and receive messages. ICM-L is designed to facilitate worldwide communication between practitioners and others with an interest in the area of Integrated Catchment Management (ICM)."

NPSINFO - Non-point Source Information (US EPA)
"NPSINFO is a forum for open discussion of nonpoint source pollution issues. It is sponsored by the United States Environmental Protection Agency's Office of Wetlands, Oceans, and Watersheds. This list welcomes participants from all public and private sectors, including government agencies, NGOs, researchers, educators, local water managers, industry, agricultural producers, and concerned individuals. Topics can range from agricultural and urban runoff to hydrologic modification and aquatic habitat modification. to technology, education, and funding alternatives and beyond. Your experience and input is valuable to others—please share it on NPSINFO!"

Septic Systems List Server (US EPA)
"The list server was established by EPA to encourage communication and information exchange among stakeholders regarding septic systems and their management. Use this list server to post notices of upcoming conferences, special events, new publications, and success stories. You can also use it to ask and respond to questions about new technologies and management methods."

Water Management List Severs (US EPA)

volmonitor - Volunteer water monitoring
waternews - Water quality information
watershed-news - Information for watershed groups and others working at the grass roots level to protect and restore watersheds
wqs-news - Water Quality Standards Information

Australian Society for Limnology
"An unmoderated, public list open to members of ASL and other interested parties. The list has been established to encourage discussion of limnological issues and to facilitate the rapid transfer of information to members of the ASL. "