It is important that residents do river environmental management,because reducing governmental burden, minization of the psuchological distance of residents and river and strengthening regional social network. Recently, these activities by cooperation of residents and administration are done.The purpose of this study makes clear the regional comparison and changing processes of the residential activities at the river.The year of starting activities increased in class A river. These activities increased from 1980s, and the most number of established party in 1988. As a result of analyzing the contents of actibities, it is shown that formation of a network which supports activity is important. An analysis of a possibility that activity will start was carried out. High potential river of environmental activity is elemntary school in the neighborhood, and much a afamily's number area.
