The Santa Clara Valley Water District has issued its groundwater report for the month of August. The report provides information regarding the groundwater supply, given that nearly half of the county's water supply comes from groundwater. The District actively monitors groundwater to assess groundwater conditions and to ensure groundwater resources are sustained and protected. The District monitors regional groundwater quality as well to evaluate current conditions and identify potentially adverse trends so that appropriate action can be taken to protect groundwater resources. The District also monitors the quality of water used for groundwater recharge to ensure groundwater quality is protected. Finally, the District monitors groundwater elevations to evaluate current groundwater conditions and land subsidence, optimize recharge efforts, assess groundwater storage, and support groundwater management efforts. The District also surveys hundreds of benchmarks each year to determine if there has been any change in the land surface elevation.