Water service line inventory
The City of Santa Ana has completed the initial lead service line inventory required by U.S. EPA’s Lead and Copper Rule Revisions [LCRR]. The deadline for the initial inventories is October 16, 2024.
Through completing a historical records review and field investigations, the City of Santa Ana has determined it has no lead or galvanized service lines in its distribution system requiring replacement. This includes any privately owned or customer-owned service lines.
The City of Santa Ana reviewed all applicable sources of information, including:
- Construction and plumbing codes, permits, and existing records or other documentation that indicates the service line materials;
- Water system records, including distribution system maps and drawings, historical records on each service connection, meter installation records, historical capital improvement or master plans, and standard operating procedures;
- Inspections and records of the distribution system that indicate service line material, including inspections conducted during the course of normal operations (e.g., checking service line materials when reading water meters or performing maintenance activities); and
- Previous service line or meter replacements were conducted.
In addition to reviewing the above sources of information, the City of Santa Ana used an alternative method to develop the inventory that was approved by the State Water Resources Control Board Division of Drinking Water on a case-by-case basis.
The City of Santa Ana used stratified random sampling to develop the initial inventory. Stratified random sampling involves physically verifying a subset of randomly selected service lines in the distribution system. That subset is stratified or divided into groups based on certain characteristics (e.g., years the service lines were installed). Stratification allows for a sample or subset of service lines to be more representative of the service lines in the distribution system.
After investigating the subset of service lines, if no lead or galvanized requiring replacement service lines are discovered, the remaining service lines may be assumed non-lead with a certain level of confidence. The City of Santa Ana verified 1,418 service lines, and the service lines were verified as “non-lead.” No lead or galvanized requiring replacement service lines were identified.
The City of Santa Ana will continue to document regular updates to service line material information from normal operations, such as service line maintenance or water meter exchanges.