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GSA presents 2024 groundwater annual report: pumping rose to ~16,210 acre‑feet; continued monitoring and actions planned
Summary
The Napa Valley Groundwater Sustainability Agency reported on water year 2024 conditions: modeled groundwater pumping rose to about 16,210 acre‑feet, single‑year stream depletion exceeded thresholds at two gauges, and the GSP—s seven‑year reduction‑in‑storage metric remains an area of concern prompting further action.
The Napa Valley Groundwater Sustainability Agency (GSA) presented its Water Year 2024 annual report to the Board of Supervisors on May 6, summarizing monitored conditions, modeled water budgets, sustainability metrics and planned implementation actions. The report said total groundwater extraction in the Napa Valley sub‑basin rose to roughly 16,210 acre‑feet for the year, with about 73% of pumping attributed to agricultural uses and roughly 18% to self‑supplied users (including domestic and on‑site uses).
Key findings: - Precipitation and context: Precipitation at the Napa State Hospital gauge was approximately 23 inches for water year 2024, a normal‑to‑below average year; staff cautioned that annual totals do not show seasonality and that 2024 featured a cool, wet spring followed by an unusually hot, dry summer that drove irrigation demand. - Groundwater and storage: Spring groundwater levels were higher than the…
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