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SFPUC greenlights $377,500 cost-share to study purified water (indirect potable reuse)
Summary
The SFPUC approved a cost-sharing agreement (not to exceed $377,500) with Alameda County Water District and Union Sanitary District to advance a purified water feasibility study that would examine indirect potable reuse options including percolation basins and advanced treatment (reverse osmosis).
The San Francisco Public Utilities Commission approved a cost-sharing agreement July 23 authorizing staff to negotiate and execute an agreement with Alameda County Water District and Union Sanitary District for up to $377,500 to fund a purified water feasibility evaluation.
Steve Ritchie described the study as a next-phase analysis of options to take wastewater, treat it to a high standard, and then use local treatment and groundwater percolation or other conveyance pathways to augment water supplies. "This is what we call potentially an indirect potable reuse project," Ritchie said, noting the study will identify options and institutional arrangements for potential future decisions.
Commissioners asked whether the concept includes drinking-water reuse. Ritchie confirmed the study would look at groundwater percolation and advanced treatment that could lead to potable uses, citing Orange County-style systems as a precedent. The commission approved the motion to participate in a trilateral feasibility study by voice vote.
