Centralized Distribution System Control in the Washington Suburban Sanitary District

THE Washington Suburban Sanitary District covers app oximately 302 sq miles of land in Maryland's Prince Georges and Montgomery counties adjacent to and surrounding the District of Columbia. The present estimated population served in the district is slightly under 500,000. The main source of water supply for the area served is Patuxent River, a tributary of Chesapeake Bay, across which have been constructed two slab-and-