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Guymon Utilities Authority begins lead service-line inventory, prepares public notifications under updated federal rule
Summary
Guymon Utilities Authority staff presented the lead and copper rule changes and said the city will publish an inventory and begin material identification work; most service lines remain 'unknown' and the city plans to prioritize options for a multiyear compliance program.
At a Guymon Utilities Authority meeting convened April 8 as part of the city council session, staff presented the revised federal Lead and Copper Rule requirements and the city’s planned public-notification and inventory steps.
Water superintendent Mac McKinley told the authority that Guymon historically followed the 1991 lead and copper rules and that the 2021 and 2024 revisions lower action levels and require water systems to inventory and, over time, identify the material of every service line. McKinley said the city has no documented lead service lines but that most of Guymon’s approximately 3,600 service connections are recorded as “unknown” for material. The city identified seven galvanized services and seven other service lines already documented as non‑lead because they were installed after 1983.
McKinley said the city will publish an online inventory and that notifications containing required EPA language will go to customers whose service-line materials are unknown; the online inventory will include a map and a QR code for public access. He said the inventory process requires physically exposing lines on both sides of the meter to determine material and that the 10‑year replacement/identification mandate will likely require either dedicated staff or contracted services and will be a multiyear and potentially expensive project.
McKinley also reported a recent nitrate exceedance event at the Cactus pump station had been resolved: subsequent lab results were below the regulatory limit, the city temporarily shut the suspect well, resampled, and purchased a handheld nitrate meter for closer operational monitoring. He said well 25 remains offline except for possible limited low‑rate use during peak demand.
Staff said formal public notifications and the inventory will be issued in the coming weeks to months and that the city is evaluating cost and contracting options for dig‑down inspections or alternative probe technologies to identify pipe materials without full excavation.
