Project Information

Bid Title

RFP for Flow Reversal Reverse Osmosis Retrofit Constructability Study

Issuing Agency

Orange County Water District

Location

California

Published Date

Jul 11, 2025

Closing Date

Aug 11, 2025

Government Level

State & Local

Status

Closed

Ref. #

RFP-24-022

Original Source

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Bid Documents

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Project Description

RFP for Flow Reversal Reverse Osmosis Retrofit Constructability Study (RFP-24-022)

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:

• RFP for Flow Reversal Reverse Osmosis Retrofit Constructability Study (RFP-24-022) – Posted 07/10/2025

Solicitation Schedule:

RFP Issued	Thursday, July 10, 2025
Pre-Proposal Meeting	N/A
Questions Due Date	Thursday, July 24, 2025, at 12:00 PM PT
Proposals Due	Monday, August 11, 2025 at 10:00 AM PT

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

Commodity Codes

• NAICS 541330Engineering Services

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