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In California, groundwater accounts for around 41% of the state's total water supply, [1] although this number varies between wet and dry years. During years of greater than average rainfall, less groundwater is used to allow for reserves to be available during dry years. Up to 60% of all water can be sourced from groundwater during dry years.
The groundwater basin provides a water supply to 19 municipal water agencies and special districts that serve 2.5 million Orange County residents. The Orange County Water District's service area covers approximately 350 square miles (910 km 2) and the District owns approximately 1,600 acres (650 ha) in and near the Santa Ana River, which it ...
Well yield (gpm) Maximum [4] Well yield (gpm) Average [4] Notes Upper Ojai Valley groundwater basin: 4-1 3,800 200 50 Ojai Valley groundwater basin: 4-2 Medium 6,830 600 383 Ventura River Valley groundwater Basin: 4-3 12,710 Santa Clara River Valley groundwater basin: 4-4 High Acton Valley groundwater basin: 4-5 8,270 1,000 140 Pleasant Valley ...
California officials voted Tuesday to step in to monitor groundwater use in part of the crop-rich San Joaquin Valley in a first-of-its-kind move that comes a decade after local communities were ...
The state saw 4.1 million acre-feet of managed groundwater recharge in the water year ending in September, and an 8.7 million acre-feet increase in groundwater storage, California’s Department ...
That case in Kings County Superior Court has effectively placed the state’s determination on hold and paused a requirement that growers begin measuring and reporting how much water they pump ...
California groundwater basins, subbasins, and hydrologic regions. The California Department of Water Resources recognizes 10 hydrologic regions and three additional drainage areas within the U.S. state of California. The hydrologic regions are further subdivided into 515 groundwater basins. [1]
California aquifers, excerpted from map in Ground Water Atlas of the United States (USGS, 2000): Lavender is "other" for "rocks that generally yield less than 10 gal/min to wells"; dark green-blue (3) are the California coastal basin aquifers, bright-turquoise blue (7) is the Central Valley aquifer system, flat cobalt-blue (1) down south is Basin and Range aquifers