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Service line inventories, validation and replacement programs pose operational challenges for water systems
Summary
State staff outlined inventory validation, classification, and mandatory replacement requirements under the LCRI, and utility and vendor commenters warned about access, inspection methods and funding hurdles for meeting inventory validation and the 10% annual replacement target.
State Division of Drinking Water staff detailed the LCRI'required service line inventory, the need for inventory validation and the mandatory service line replacement program that begins Nov. 1, 2027 for systems with lead, galvanized requiring replacement (GRR) or unknown service lines.
The LCRI requires a baseline inventory due Nov. 1, 2027, reporting of connector materials and locations, and annual updates beginning Jan. 30, 2029 unless a system demonstrates all lines are non-LED. The baseline must classify entire service lines as "lead," "galvanized requiring replacement (GRR)," "unknown," or "non-LED." Systems that relied on records, diameter, or statistical interpolation to mark lines non-LED must include those lines in an inventory validation pool and perform randomized visual inspections; a service line is considered validated after visual inspection at two points.
For systems with lead/GRR/unknown service lines, the LCRI requires a mandatory replacement program: systems must submit a replacement plan by Nov. 1, 2027, make plans publicly accessible for large systems, and meet a cumulative annual replacement rate of 10%. Systems must document efforts to obtain property-owner consent, offer full replacement to new owners within six months of ownership, and provide mitigation (for some disturbances) such as pitcher filters and six months of certified filter supplies.
Utility and vendor concerns: Industry commenters at the workshop urged realistic expectations and careful technical guidance. Nick Blair of the Association of California Water Agencies urged clear roles, phased implementation and funding support, saying systems often lack direct access to interior plumbing and face logistical and labor costs. Vendor Chuck Hansen said zero reported lead lines statewide seems inconsistent with his field work and cautioned that visual inspections limited to two points can undercount buried lead service lines.
Agency response and implementation support: Division staff acknowledged operational challenges and said the state will provide further training and technical workshops later in 2026 and throughout 2027 focused on validation protocols, sampling plan design and replacement-plan requirements. They stressed that validation is not required for service lines with field-confirmed records or lines installed after earlier lead bans, but that systems using statistical methods should expect additional field verification.
