Starting Monday, Roseville is turning on its four aquifer wells and delivering groundwater to customers as part of an effort to preserve Folsom Reservoir.
Folsom Reservoir, the city's main water source, is only about 18 percent full -- a near-record low.
Roseville's Environmental Utilities Director, Ed Kriz, says that's why turning on the wells now is so important.
"These are unprecedented times," he says. "We've never seen conditions this bad in the watershed. We feel that we need to do this measure at this time to be able to preserve the water that is in Folsom so that we have an opportunity to stretch that supply through the summer when it will be critical."
The reservoir also supplies water to the City of Folsom and the San Juan Water District.
Kriz says Roseville has never run all four wells at once. He says the water meets all regulatory standards for drinking water, but he says some customers may notice the change, as the groundwater tends to have a harder quality.
Roseville is also asking customers to cut their water use by 20 percent. Water districts in Citrus Heights and both the city and county of Sacramento are also using well water.
The drought intensified over the last week in the Western U.S. as the region swelters under a heatwave and firefighters battle major wildfires.
Dangerous fire weather conditions has prompted one federal agency to impose fire restrictions on public lands in northern California.
Mandatory statewide water conservation rules have ended in California. But Sacramento-area users conserved 22 percent in June, compared to June 2013.
California and federal agencies say a new strategy is needed to save the endangered Delta smelt.
California is in the fifth consecutive year of drought, but state water managers ended mandatory conservation rules. Local water suppliers now determine conservation rates, and some have low or no targets. A water expert says that's 'shortsighted.'