Science activity

DWR continuously monitors surface water quality and hydrology at 49 sites within the Delta. The extensive DWR Central District Surface Water Monitoring network provides continuous data of flow magnitude and direction and general chemical water quality characteristics. Electrical conductivity (EC) is measured continuously at 24 of these stations. Measurements are recorded at 15-minute intervals and then reduced to a report format. At each EC site, equations are available to convert EC to chlorides and total dissolved solids. Several of the EC stations in the Delta also continuously monitor temperature and provide 15-minute temperature data.