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Groundwater levels had dropped from 50 feet below historic levels and up to 100 feet below in the San Joaquin Valley. In 2016, DWR identified an additional 10 basins as being in COD status for a total of 21 COD basins. [8] These COD basins are required to reach sustainability in a shorter timeframe, by 2040 rather than 2042 under SGMA.
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 state groundwater law, which was signed nearly 10 years ago, requires local agencies in many areas to develop groundwater plans and curb overpumping by 2040.
Today, experts and state officials say implementation of the Sustainable Groundwater Management Act, or SGMA, is unfolding largely as expected. But while California has made some preliminary ...
California water regulators are cracking down on a second farming area in the San Joaquin Valley for failing to take adequate steps to curb overpumping that is depleting groundwater, causing the ...
While the volume of groundwater in California is very large, aquifers can be over drafted when groundwater is removed more rapidly than it is replenished. In 1999, it was estimated that the average, annual overdrafting was around 2,200,000 acre-feet (2.7 km 3 ) across the state, with 800,000 acre-feet (0.99 km 3 ) in the Central Valley.
Siding with environmental groups, a judge has ruled that Sonoma County must take action to protect creeks and salmon from excessive groundwater pumping.
Groundwater that is a subterranean stream is subject to the same water right permitting requirements as surface water. California has no statewide water right permit process for regulating the use of percolating groundwater. A subterranean stream meets the following four characteristics: (1) A subsurface channel must be present; (2) The channel ...