Supporters of a moratorium on hydraulic fracturing in California packed a legislative hearing.

Up for debate were three bills that would put a hold on the fracking process, which injects a mix of chemicals and water deep underground to release oil from rock. They fear it endangers public health and contaminates water.

"This is a situation that is crying out for regulation,"  says Democratic Assemblymember Richard Bloom, who authored a fracking moratorium bill. He says he's received 7,000 emails in support of the legislation.

"We see before us an industry that is going to resist regulation, the best way to get everybody to the table is to use a moratorium."

The oil industry says regulations are already being drafted by California's Division of Oil, Gas, and Geothermal Resources.

"Until that process is done and we know what those final regs look like, it doesn't make a lot of sense to go about passing a lot of legislation," says Tupper Hull with Western States Petroleum Association.

Oil companies argue fracking has been used safely in the state for decades. Paul Deiro with Western States told lawmakers a moratorium would mean lost jobs in the Central Valley.

"We have the potential according to the US Department of Energy of potentially extracting 15 billion barrels of oil out of the Monterrey Shale."