The district's 2025 Monterey Subbasin Annual Groundwater Sustainability Plan Report identified two primary undesirable results: declining groundwater levels in the deep aquifer (staff noted exceedances reported for 5 of 9 wells and discussed threshold/criteria issues affecting interpretation) and slowly progressing seawater intrusion, with one inland well now hitting 500 mg/L chloride. New monitoring wells funded by state grants have filled critical data gaps in the 400-foot and deep aquifers south of the Salinas River within MCWD's service area, and the district is feeding this data into a regional model to evaluate which corrective projects will be most effective.
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