DDW Guidance on Preparing LSL Inventories

The Lead and Copper Rule Revisions (LCRR) requires public water systems prepare an inventory of their service lines that includes both the publicly-owned and privately-owned portions of the line.

The State Water Resources Control Board (SWRCB), Division of Drinking Water (DDW) posted an updated FAQ document for preparation of the lead service line inventory. DDW also posted instructions and an Excel template for preparation of the service line inventory (water systems are not required to use this format).

Copies can be found here:

The deadline for preparation of the service line inventory is October 16, 2024.