SDWA Lead Service Line Inventory (LSLI) Administrative Orders issued by the United States Environmental Protection Agency (EPA) to the Oklahoma National Stockyards Company on April 2, 2026. The Orders were issued in response to the system's failure to develop a Lead Service Line Inventory (LSLI), pursuant to the Lead Copper Rule Improvements (LCRI). Per the Order, systems are required to develop an adequate LSLI, submit the inventory to the state, and if applicable issue a public notice for their failure to develop the LSLI by the statutory due date October 14, 2024.