Coastal Treatment Plant Regional Flow Study
At its March 5, 2026, SOCWA Board of Directors meeting, Project Committee 15 (PC-15) approved a professional services agreement with MKN, to prepare the Coastal Treatment Plant (CTP) Regional Flow Study. The purpose of the study is to evaluate planning-level regional wastewater conveyance and treatment alternatives associated with potential future decommissioning of the CTP and identify major infrastructure requirements, operational impacts, regulatory considerations, recycled water impacts, and planning-level costs.
The study evaluates three primary regional alternatives:
- Redirection to Orange County Sanitation District (OC San) Plant No. 2 and the Regional Treatment Plant (RTP);
- Redirection to the JB Latham Treatment Plant (JBL); and
- Redirection to the RTP.
A draft final report has been completed that incorporates the feedback from the PC15 Engineering Committee members and the stakeholders: MNWD and OC San. The report will be presented at the July 9, 2026 Board of Directors meeting.