Water mainlines are underground pipes that carry drinking water to from treatment plants throughout the the District's service area.  Service lines are the pipes that branch off from the mainlines to supply water to homes and businesses.  Water mainlines are constructed in a variety of sizes depending on their place and function within the distribution system and are made from different types of…

The District's Cross-Connection Control Program was created in accordance with federal and state regulations to reduce the risk of contamination from sources existing downstream of the District's potable water system by preventing, eliminating or controlling cross-connections.