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PUC to introduce groundwater blending to city water system; staff says quality meets standards
Summary
Assistant GM Steve Ritchie told the PUC the Groundwater Supply Project will bring up to 4 million gallons per day from six wells on the Westside Basin, beginning around 1 million gallons per day and ramping up; staff said constituent levels (nitrate ~1.45 mg/L) remain well under drinking‑water standards and Division of Drinking Water approval is imminent.
The San Francisco Public Utilities Commission received an update on the San Francisco Groundwater Project, which staff said will diversify the city's supplies by tapping the Westside Basin Aquifer and blending groundwater with regional supplies distributed to roughly half the city.
Key facts presented: staff said the project will ultimately access about six wells and is expected to supply up to 4,000,000 gallons per day; initial operations are planned at roughly 1,000,000 gallons per day with an annual ramp of about 1,000,000 gpd. Phase 1 includes four wells…
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