Consumer Confidence Report
The City operates a conjunctive use water system which includes raw and treated surface water supplies from PCWA and operation of four City-owned municipal wells. PCWA supplies up to 17 million gallons a day (MGD) of treated wholesale surface water to the City. PCWA surface water originates in the Sierra snow pack. The City wells produce up to 7 MGD of drinking water which requires only disinfection treatment and helps to efficiently manage its water system, especially during a potential outage by PCWA and in the event of drought.
The water quality report is available every July for the previous year.
Download Past Years' Consumer Confidence Reports
Download the 2023 Consumer Confidence Report
Download the 2022 Consumer Confidence Report
Download the 2021 Consumer Confidence Report
Lead Service Line Inventory
The City of Lincoln (City) has completed the initial lead service line inventory required by U.S. EPA’s Lead and Copper Rule Revisions. The deadline for the initial inventories was October 16, 2024.
Through completing a historical records review and field investigations, the City 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.
The City reviewed all applicable sources of information, including
- Construction and plumbing codes, permits, and existing records or other documentation which 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 that were conducted.
In addition to reviewing the above sources of information, the City 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 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 verified 325 service lines, and the service lines were verified non-lead. No lead or galvanized requiring replacement service lines were identified. Within the context of the regulatory history of plumbing ordinances in California, a de facto ban on LSL has long been established. The City prioritized the inspection of homes built prior to 1986, as this was the year the use of lead in water service lines was banned.
The City continues to document service line material information obtained from normal operations, such as service line maintenance or water meter readings, after October 2024 and will update the initial inventory accordingly.