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District reports PFAS levels below California response level; project nears 90% design
Summary
Operations Manager Matt Brooks reported the North Bay raw water PFOA result at 14 ppt and a quarterly running average for finished drinking water of 7.2 ppt—below California’s 10 ppt Response Level—and said the PFAS treatment design is approaching 90% completion.
Operations Manager Matt Brooks told the Board the North Bay raw water sample tested at "14 parts per trillion (ppt) for PFOA," and that the quarterly running average for the finished drinking water delivered to customers is 7.2 ppt, which remains below the California Response Level of 10 ppt. Brooks said the District received new quarterly required samples from the Bernina raw water source and the three highest-producing wells and is coordinating with the N2W design team and the Division of Drinking Water as the project moves toward 90% final plans.
The update emphasized monitoring and ongoing regulatory coordination but did not propose new customer restrictions. The Board received the report with no public comment. The District did not state proposed construction schedules or final treatment costs in this meeting; those details remain subject to the ongoing design-review process.
