TCWD has completed the Lead Service Line Inventory (LSLI) required by US EPA’s Revised Lead and Copper Rule (LCRR). The US EPA deadline for the LSLI is October 16, 2024.  

Through completing a historical records review and field investigations, TCWD has determined it has no lead or galvanized requiring replacement service lines in its distribution system. This includes any privately-owned or customer-owned service lines. 

TCWD reviewed all applicable sources of information, including: 

• Available construction and plumbing codes to assess historical regulation of lead service line disallowance (e.g. National Lead Ban, State Codes, County Codes, the codes and standards of the cities). 

• Water system records which indicate the service line materials, tax assessor records, tract maps, county parcels, historical capital improvement or master plans. 

• Water distribution system records which indicate the service line materials, GIS data, distribution system maps and drawings, and as-builts.  

In addition to reviewing the above sources of information, TCWD used an alternative method to develop the LSLI that was approved by the State Water Resources Control Board Division of Drinking Water on a case-by-case basis.  

TCWD used indirect interpolation and stratified random sampling approaches to develop the LSLI. Both approaches involve physically inspecting a representative subset of service lines to confirm non-lead materials. The subset was stratified or divided into groups based on certain characteristics (e.g., years the service lines were installed) to address areas of higher lead likelihood.  

TCWD field inspected 17 service lines on the utility-side, 206 service lines on the customer-side, and 98 service lines on both sides, and all the service lines were inspected to be non-lead. No lead or galvanized requiring replacement service lines were identified.  

TCWD intends to document service line material information obtained from normal operations, such as service line replacements, after October 2024 and will update the LSLI accordingly. 

For more information about the Revised Lead and Copper Rule, please visit the US EPA website

About lead

Elevated levels of lead exposure can cause serious health problems, especially for pregnant women and young children. In California, exposure to lead is most likely to be found in older homes where lead-based paint or lead solder was used, or lead-tainted plumbing fixtures installed. When it comes to drinking water, lead in public water systems is rare in California — but it can be more common in some older Midwestern and Northeastern United States communities.

If you are concerned about lead or other substances in your water, TCWD's water quality report is available here or you can access a searchable list of state-certified laboratories near you at the following link

Free viewers are required for some of the attached documents.
They can be downloaded by clicking on the icons below.

Acrobat Reader Windows Media Player Word Viewer Excel Viewer PowerPoint Viewer