Each spring and fall, the YCFCWCD measures the groundwater in approximately 150 wells. The sawtooth shape of the line in the graph above is due to the spring/fall fluctuation each year, high in spring, low in fall.
This fall 2015’s measurements show the groundwater is slightly higher than last fall. Water levels are higher this year because of the availability of surface water from the Cache Creek system. This year about 25% of a full amount was available, while last year in 2014, zero water was available from Cache Creek. So there was less groundwater pumping this past summer, which is reflected in the higher groundwater levels this fall. Even though groundwater is in better shape today than in 2014, it is still low due to the drought.