RWSN is one of many networks out there that serve the needs of professionals. Networks work best when they have a uniting topic, or geography, that brings people together, and the scope doesn't get too broad. We focus on improving water services for rural poor anywhere in the world - we don't cover rural sanitation, because others do that much better than us (SuSanA!)
Quite often there are topics and challenges that bring us together with other networks. Below are just some of those that we work with and if they are useful to you, then go ahead and get involved with them as well.