RFP for Flow Reversal Reverse Osmosis Retrofit Constructability Study

The Orange County Water District (“OCWD” or District) is seeking proposals from qualified and experienced firms to provide professional consulting services to develop a flow reversal reverse osmosis (FRRO) retrofit constructability study. The study will evaluate the constructability of retrofitting an existing 5-million gallon per day (mgd) permeate production potable reuse reverse osmosis unit at the OCWD Groundwater Replenishment System (GWRS) to high-recovery FRRO to increase recovery from existing 85% to 90% or more, complete a life-cycle cost estimate, and provide recommendations for full-scale retrofit. OCWD intends to evaluate the proposals received and enter into a One-Year Professional Services Agreement (“Agreement”) with the qualified firm. The work is expected to commence on November 1, 2025. This Agreement will be for a minimum term of one (1) year for the period from November 1, 2025 to October 31, 2026.

RFP Documents:

Solicitation Schedule:

For questions, please contact at procurement@ocwd.com .