California has 14 underground storage facilities in 12 fields with a
capacity of 385 billion cubic feet of natural gas. There are about 350
active wells at those fields, many of which are used currently for
natural gas but were designed for oil and gas production and constructed
prior to 1970. The massive natural gas leak at Aliso Canyon shined a
light on California’s aging natural gas infrastructure. And five years
of extreme drought also exacted its toll on transmission pipelines.