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WAC data shows sharp rainfall shortfall; committee cites evapotranspiration impacts
Summary
A WAC presentation showed a measurable precipitation deficit — 'only 17" since the end of March' — and committee members discussed evapotranspiration, turf irrigation impacts, and the long-term implications for the island's aquifer.
Member David Ruby presented a Seasonal Rainfall Comparison at the May 18 meeting showing a significant precipitation deficit, noting "only 17" since the end of March" and explaining the role of evapotranspiration in increasing demand, particularly for turf lawns. The minutes record the Big 4 wells' average percentile rank fell to the sixth percentile, the lowest in eight years of tracking.
Committee members said the deficit — and the appearance of green lawns despite low recharge — presents a communications challenge when urging voluntary water‑saving behaviors. Member Greg Toner and others emphasized the need to explain the data to residents and to link outreach to practical information such as water testing and irrigation adjustments.
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