The Sacramento River carries far more water than the San Joaquin, with an estimated of virgin annual runoff, as compared to the San Joaquin's approximately . Intensive agricultural and municipal water consumption has reduced the present rate of outflow to about for the Sacramento and for the San Joaquin; however, these figures still vary widely from year to year. Over 25 million people, living both in the valley and in other regions of the state, rely on the water carried by these rivers.