WATER RESOURCES MANAGEMENT
Groundwater Reports
Since the Fall of 1971, the San Joaquin County Flood Control and Water Conservation District (District) has monitored groundwater levels and groundwater quality throughout San Joaquin County and has published the data in the Semi-annual Groundwater Report. This report utilizes data from Federal, State and local government agencies as well as non-governmental sources.
Water level data is collected on a semi-annual basis, during the months of April and October, to observe groundwater levels before and after peak groundwater pumping conditions. Over 550 wells, of which 300 are measured by County staff, are included in the Monitoring Program. The exact number of wells varies from year to year, depending on circumstances such as destructions, new well construction, well accessibility, and well condition.