Water Recycling


RMC has completed recycled water planning and implementation for all of the major urban centers in California.

Delta-Mendota Canal at sunset

North Valley Regional Recycled Water Project

Cities of Modesto, Turlock, Ceres; Del Puerto Water District, Stanislaus County

RMC is managing a team of consultants working on the North Valley Regional Recycled Water Program (NVRRWP), a regional solution to address part of the continuing California water crisis. The NVRRWP will make tertiary-treated recycled water available to the drought-impacted west side of the San Joaquin Valley. The first phase of NVRRWP could produce and deliver 25-30,000 acre-feet per year of tertiary-treated water; water estimated to restore approximately $29 million in annual agricultural production to the local economy. RMC helped the program receive a new NPDES permit from the Central Valley Regional Water Quality Control Board that allows for a first-ever discharge to the Delta-Mendota Canal, a federally owned facility that delivers Central Valley Project Water to south of Delta agricultural and municipal water users. The program received a 2015 Planning Honor Award by the American Academy of Environmental Engineers and Scientists and a 2016 Outstanding Environmental Analysis Document Award from the California Association of Environmental Professionals.

Sunny Oaks percolation ponds

Preliminary Program Assessment Indirect Potable Reuse (IPR), Purified Water Program

Santa Clara Water District

The Santa Clara Valley Water District (District) elected to expedite implementation of the purified water program framed by the South Bay Water Recycling Strategic and Master Planning Report completed by RMC in December 2014 in a partnership with the City of San Jose. The District targeted construction of advanced treatment, conveyance, and groundwater replenishment facilities to support up to 45,000 AFY IPR by 2020 rather than the 2035 target date in the Master Plan. RMC is providing technical assessments to further develop project elements including recharge ponds, injection wells and conveyance facilities and was recently awarded a contract for the preliminary engineering work.

Homes in Rowland Water District

Chestnut Bypass and Hatcher/Rowland Recycled Water Pipeline Design

Rowland Water District

RMC is providing design and construction support for a pipeline network that includes a looped recycled water distribution system. We are working closely with the contractor to expedite two near-term pipelines so they are constructed before a pipeline project on Fullerton Road begins. The design includes a 12-inch recycled water distribution pipeline on Hatcher/Rowland streets and a 12-inch bypass pipeline on Chestnut Street that will connect a cluster of customers within the City of Industry to the recycled water system. Due to current recycled water demand and water quality requirements, the Walnut Creek Energy Park Power Plant in Industry has prompted the design of a new recycled water pipeline dedicated to serving the power plant.

Downtown San Jose

South Bay Water Strategic and Master Plan Services

City of San Jose

RMC completed strategic and master planning to establish the future direction, policies, and priorities of the South Bay Water Recycling program, which is expected to result in system improvements and expansions over a 20-year planning horizon. The scope of the project went beyond a typical master plan, beginning with a strategic evaluation of how South Bay Water Recycling could transition from an organization focused on discharge reduction through nonpotable reuse to an organization that promotes sustainable water supply through expanded non-potable, indirect and (eventual) direct potable reuse. The project evaluated alternatives to pay for these efforts, and how to apportion the costs between wastewater and water supply stakeholders.

Oceanside coast from above (image via Wikicommons; wingtipvortex)

Mission Basin Indirect Potable Reuse and Pathogen Removal Study

City of Oceanside

RMC completed an innovative evaluation of the feasibility of indirect potable reuse (IPR) that included a key technical study of the removal of pathogens through a water reclamation facility. The City is undertaking this study to enhance water supply reliability for its customers. This project has unfolded during a time of significant regulatory uncertainty, with the California Department of Public Health’s (CDPH’s) recently-released groundwater recharge draft regulations subject to interpretation and the statewide conversation on direct potable reuse amplifying.

Roseville library (image via Flickr; Ray Bouknight)

Recycled Water Systems Evaluation

City of Roseville

RMC updated the City of Roseville’s recycled water systems evaluation report, including revising the market assessment to reflect recent recycled water usage data and changes in potential new customer demands. We evaluated the availability of wastewater treatment plant supply and identified potential shortages, incorporated new policy changes with respect to developments located outside the City, and evaluated new distribution alternatives for service to future developments. We developed a phasing and implementation plan for the preferred alternative.