Amendments to the Water Quality Control Plan for the Santa Ana River Basin to Incorporate Total Maximum Daily Loads for Copper for Newport Bay, Orange County,CA

The Santa Ana Regional Water Quality Control Board, in coordination with the State Water Resources Control Board and the Office of Administrative Law, has finalized regulatory amendments to the Water Quality Control Plan for the Santa Ana River Basin to establish Total Maximum Daily Loads (TMDLs) for copper in Newport Bay, California. These TMDLs, which are mandated under the federal Clean Water Act, set a specific water quality target of 3.1 µg/L for dissolved copper based on the California Toxics Rule and include sediment thresholds using NOAA’s Effects Range Low or Sediment Quality Objectives methodology. The implementation plan spans up to 12 years with a required 60% reduction in copper discharges prior to full compliance, with emphasis on reducing copper loading from antifouling paints used on recreational and commercial vessels. Primary responsibility for executing the plan falls to the City of Newport Beach and the County of Orange as sovereign tidelands trustees, alongside marina operators, underwater hull cleaners, and boat owners who must develop and implement compliance strategies including Best Management Practices and monitoring programs. The estimated financial commitment for implementing the Copper TMDL program is approximately $2.5 million, covering a five-year monitoring framework for water, sediment, and fish tissue; special studies on copper loading from sediments and vegetation; data analysis; reporting; public outreach; website maintenance; a diver certification program; and project oversight. An optional phase for ongoing outreach, website updates, and diver certification could extend costs beyond the base period. Compliance is evaluated through environmental sampling conducted in Upper and Lower Newport Bay, San Diego Creek, and associated marine facilities, with the Santa Ana Water Board retaining enforcement authority. While the regulatory framework is formally adopted and legally binding, the instrument is not structured as a traditional procurement contract; it lacks standard FAR clauses, contract types, invoicing systems, or formal contracting officer designations. Instead, it functions as a state-led environmental mandate under CEQA and the Clean Water Act, with performance obligations imposed directly on dischargers rather than procured services. No firm delivery schedule or FOB terms apply, and while detailed cost estimates are provided, there is no official contract ceiling or formal solicitation structure. The implementation remains contingent on adaptive management and stakeholder coordination to ensure both ecological outcomes and equitable burden distribution among regulated entities.