Groundwater level in California basin hits historic low

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Brandon Arthur, 10, crawls out of the gooey muddy tailings left by his father Steve Arthur’s water well drill site in Terra Bella. (Bob Chamberlin / Los Angeles Times)

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Sunrise illuminates previous signs of life amid the dry, steep banks due to drought conditions at Lake Shasta. (Allen J. Schaben / Los Angeles Times)

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Puddles of water are all that remain in some areas of San Gabriel River’s West Fork in the Angeles National Forest. (Allen J. Schaben / Los Angeles Times)

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Pastel colors at dawn reveal a receding Lake Cachuma in Santa Barbara County. (Allen J. Schaben / Los Angeles Times)

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Dusk falls as a lone boater heads out on Lake Shasta near the Lake Shasta Dam. Amid serious drought conditions, Lake Shasta is at only 37% of capacity and is likely to go lower. (Allen J. Schaben / Los Angeles Times)

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The Bridge Bay Marina at Lake Shasta reveals signs of serious drought conditions. (Allen J. Schaben / Los Angeles Times)

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An egret searches for food in a nearly dry canal near Red Bluff in Northern California. (Allen J. Schaben / Los Angeles Times)

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A passing boat is dwarfed by the steep, barren banks of Lake Oroville in Northern California, whose water level has fallen 160 feet. (Allen J. Schaben / Los Angeles Times)

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Pier pilings reach high out of the water at dusk amid extremely low water levels at Castaic Lake Recreation Area. (Allen J. Schaben / Los Angeles Times)

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Owner Elaine Newton walks with her daughter Ashleigh Newton along the family-owned Rancheria Marina docks and boat ramps that are now idle, at Huntington Lake due to historically low water levels caused by the drought. (Mark Boster / Los Angeles Times)

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Chalked initials and the date mark the exposed wall of one of the dams revealed as the water level fell amid the continuing drought at Huntington Lake in Fresno County. (Mark Boster / Los Angeles Times)

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The Bridge Bay Marina at Lake Shasta reveals signs of serious drought conditions June 22. (Allen J. Schaben / Los Angeles Times)

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A nearly-empty boat house and dock are dwarfed by land at the drought-stricken Lake Isabella on July 12. (Allen J. Schaben / Los Angeles Times)

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A couple strolls with their dog along a dusty shoreline that is usually under water at Huntington Lake on July 10. Water is at the lowest level that many in the tiny High Sierra community in Fresno County can remember. (Mark Boster / Los Angeles Times)

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The water level at Huntington Lake is at the lowest that many in the tiny High Sierra community in Fresno County can remember. Most of the boat docks around the lake are now high and very dry. (Mark Boster / Los Angeles Times)

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Low water at Huntington Lake during the drought leaves a bridge of land to the island. Kayaking to the island is usually part of a summer visit. (Diana Marcum / Los Angeles Times)

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An observation deck over the lake is left high and dry as the water level has dropped 50 percent in Huntington Lake this summer. (Diana Marcum / Los Angeles Times)

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Severe drought conditions are evident as hundreds of house boats are dwarfed by steep banks that show the water level down 160 feet from the high water mark at Bidwell Canyon Marina on Lake Oroville on June 21. (Allen J. Schaben / Los Angeles Times)

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Looking toward the San Gabriel River from East Fork Road north of Azuza in February, the San Gabriel reservoir can be seen in the far distance where it has receded more than a mile. (Don Bartletti / Los Angeles Times)

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Secret Service agents look over a dry farm field as President Barack Obama speaks to media about the drought situation in California in February. (Wally Skalij / Los Angeles Times)

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A boat launch at Folsom Lake sits along the banks of the drought-ridden lake in February. (Robert Gauthier / Los Angeles Times)

By Veronica Rocha

July 22, 2014 12:50 PM PT

The groundwater level in the San Bernardino Basin area is at its lowest point in recorded history, officials say.

Measured in volume, the groundwater level for the basin is now about 500,000 acre-feet below full, according to Douglas Headrick, general manager for the San Bernardino Valley Municipal Water District.

That would put it below the previous low recorded in 1964, a period that followed a 20-year drought, officials said.

“This isn’t just an issue for San Bernardino, but many other cities depend on this basin for much of their water supply, including Redlands, Highland, Loma Linda, Rialto, Colton and Riverside,” the district’s water resource manager, Bob Tincher, said.

The San Bernardino district and the Western Municipal Water District in Riverside, he said, were facing major challenges, including significant cutbacks in deliveries from the California State Water Project through the Sacramento-San Joaquin River Delta and the Colorado River.

The region’s water problems are underscored by the fact that few residents know where their water comes from, Tincher said.

A survey of 400 residents conducted in March that was commissioned by 13 water agencies, including the San Bernardino district, found that just 3% to 5% of Inland Empire residents knew that 30% of the area’s water supplies were imported.

“These survey results showed us that we have some work to do,” Tincher said. “If Inland Empire residents do not know that we are dependent on water imported from Northern California for close to a third of our water supply, then they will not understand the need for projects such as the Bay Delta Conservation Plan, which will safeguard our critical imported water supplies.”

Part of the plan includes the construction of two massive tunnels that would move fresh water from the delta to pumping stations that distribute water to the region.

For breaking news in Los Angeles and throughout California, follow @VeronicaRochaLA. She can be reached at veronica.rocha@latimes.com.