Is the Delta affected by tides from the Pacific Ocean?
Tidal action from the Pacific Ocean extends to the Delta, to above Sacramento on the Sacramento River and to above Mossdale on the San Joaquin River. The variation between high and low tides can be as much as 8 feet, but more typically is 4 to 6 feet. From San Francisco, the salt content of the water gradually decreases, therefore making the Delta a fresh water waterway.
