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Alameda County denies Zone 7 appeal, approves 190-unit Arroyo Lago subdivision

Alameda County Board of Supervisors (Planning Committee) · February 10, 2026
AI-Generated Content: All content on this page was generated by AI to highlight key points from the meeting. For complete details and context, we recommend watching the full video. so we can fix them.

Summary

Alameda County supervisors denied an appeal by Zone 7 Water Agency and approved the Arroyo Lago subdivision, certifying the final EIR and approving the vesting tentative tract map for 190 single-family lots despite Zone 7's concerns about a wastewater treatment plant near the Livermore groundwater basin.

Alameda County supervisors on Feb. 10 voted to deny an appeal from Zone 7 Water Agency and approved the Arroyo Lago subdivision, a 190-unit project on a 26.6-acre site in unincorporated Alameda County.

Planning staff recommended upholding the planning commission's approval and certifying the final environmental impact report (EIR). "Planning staff recommends that the board of supervisors deny the appeal, certify the EIR and approve the vesting tentative track map," county planning staff said during the hearing, summarizing its conclusion that the administrative record contains substantial evidence supporting the commission's decision.

Why it matters: Zone 7, the groundwater sustainability agency for the Livermore basin, argued the proposed on-site membrane bioreactor (MBR)…

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