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i12 Delta Salinity Contours

Published by California Department of Water Resources | State of California | Metadata Last Checked: January 27, 2026 | Last Modified: 2026-01-06T16:42:22.000Z
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.

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