The water service line inventory is part of a national effort to ensure public water systems are reducing lead exposure to their customers. The U.S. EPA requires all large public water purveyors to complete a Lead Service Line Inventory (LSL Inventory). The objective of the LSL Inventory is to determine if there are any lead pipes in the water distribution system on both the public and customer (private) portions.
Sonoma’s drinking water is very low risk for lead contamination. Sonoma’s customer water service pipes are typically copper or plastic with a few older homes having galvanized iron. The City of Sonoma has standards that require copper or galvanized iron service lines to be installed on the City side of the meter, and in 1986 there was a federal ban on lead pipes that required all new household plumbing fixtures be lead-free.