The San Joaquin Valley Groundwater Basin lies within the San Joaquin River and Tulare Lake Hydrologic Regions (HRs).

San Joaquin Valley – Tule is a(n) basin with approximately 3396 wells, of which approximately 154 are water supply wells. The northern portion of the basin is within the San Joaquin River HR and consists of nine subbasins. What’s the plan to end groundwater overdraft in the San Joaquin Valley? Groundwater accounts for approximately 94.56 percent of the basin’s water supply. The Groundwater Resources Association of California and the University of California Water Security and Sustainability Research Initiative have proposed large increases in future diversions from the Sacramento River and the Sacramento-San Joaquin Delta to provide recharge of overdrafted groundwater basins in the San Joaquin Valley. In the southern portion of the San Joaquin Valley, vertical subsidence as high as 85 cm has been observed between June 2007 and December 2010 using Interferometric Synthetic Aperture Radar (InSAR). The northern portion of the basin is within the San Joaquin River HR and consists of nine subbasins. If more groundwater is pumped than the amount replenished over time, the basin is in overdraft. In the San Joaquin Valley, California, recent droughts starting in 2007 have increased the pumping of groundwater, leading to widespread subsidence. The Eastern San Joaquin Groundwater Authority was established as a public entity with the mission of the Authority providing dynamic, cost-effective, flexible and collegial organization to insure initial and ongoing SGMA compliance within the Basin. “Restoring the San Joaquin Valley’s canals is one of the most efficient ways to improve the sustainability of California’s water supply. The Central Valley aquifer extends for about 400 miles under the Sacramento and San Joaquin valleys. These subbasins are the Cosumnes, Eastern San Joaquin, Tracy, Modesto, Turlock, Merced,

Beginning around the 1920's, farmers relied upon groundwater for water supply.

This High priority basin is home to an estimated 109,471 people (2010 value), which have been at a rate of 37.53. Water Foundation commissioned an analysis of 26 GSPs in the San Joaquin Valley to understand how private domestic drinking water wells in the region will be affected on the path to sustainability. Most of these sub basins are located in the San Joaquin Valley. In fact, recent studies have shown that communities with nitrate-contaminated groundwater pay on average three times the cost for water recommended by the US EPA (Pacific Institute, The Human Costs of Nitrate-Contaminated Drinking Water in the San Joaquin Valley, 2011). Located in California’s Tulare Lake hydrologic region, the San Joaquin Valley – Tule is 477,646 acres in size. The San Joaquin Valley—which has the biggest imbalance between groundwater pumping and replenishment in the state—is ground zero for implementing the 2014 Sustainable Groundwater … The San Joaquin Valley Groundwater Basin lies within the San Joaquin River and Tulare Lake Hydrologic Regions (HRs). The subterranean water, some of which … This Medium priority basin is home to an estimated 18,508 people (2010 value), which have been at a rate of 29.39. San Joaquin Valley – Eastern San Joaquin is a(n) basin with approximately 13668 wells, of which approximately 415 are water supply wells. In our study of the valley’s 30-year water balance (1988‒2017), which used data on inflow and outflow to the San Joaquin Valley as a whole, we found a long-term overdraft of 1.8 million acre-feet per year—about 11% of net water use. To protect this vital resource, the State of California created the Groundwater Ambient Monitoring and Assessment (GAMA) Program. ... Bulletin 118 is California’s official publication on the occurrence and nature of groundwater statewide. San Joaquin Valley continues to sink because of groundwater pumping, NASA says Subsidence occurs when water is removed from underground aquifers … The Groundwater Resources Association of California and the University of California Water Security and Sustainability Research Initiative have proposed large increases in future diversions from the Sacramento River and the Sacramento-San Joaquin Delta to provide recharge of overdrafted groundwater basins in the San Joaquin Valley. To protect this vital resource, the State of California created the Groundwater Ambient Monitoring and Assessment (GAMA) Program.