NBC Southern California has reported a faulty natural gas storage well at Southern California Gas Company is causing fumes and odors to invade neighboring Porter Ranch residences. The leak was discovered on October 23, 2015, at an Aliso Canyon storage facility near Northridge, and was later reported to the county five days later.

The leak could take months to repair, but the gas company claims there is no threat to residents because of its distance from public areas or homes. However, some residents are complaining of a rotten-egg smell and reporting health issues including nosebleeds, headaches and nausea. The Los Angeles County Department of Public Health has directed the gas company to provide free, temporary relocation to any affected residents.