Description: <DIV STYLE="text-align:Left;"><DIV><P><SPAN>Data represents maximum up-estuary intrusion of the 1 ppt salinity contour. The lines represent 1000 ppt chloride per million, measured 1½ hours after high tide. This data contains contours for 1921-1990.</SPAN></P></DIV></DIV>
Copyright Text: California Department of Water Resources