Thirty-seven families were evacuated as a precaution on September 12 after excess methane gas was detected during the capping of a well on Truro Avenue by the Golden State Water Company. Thousands of gallons of water spewed from the uncapped well.
Methane gas is potentially flammable and fatal.
Displaced residents were relocated to nearby hotels. The Los Angeles County Fire Department allowed people back into their homes and business on Wednesday.
A hazardous-materials team was on the scene checking levels in the area.
Crews have installed a plug and preformed pressure tests on the well cap.