Skip to main content

Information on Plant Closure

(805) 343-3210

General Business


The 1,780-acre Santa Maria Refinery is located adjacent to State Highway 1 on the Nipomo Mesa. Only about 200 acres, or roughly 11 percent of the land, is used for company operations. The remainder is grazed by cattle, held as open space or used as a preservation area for wildlife in the Nipomo Dunes.

Santa Maria Refining operations are scheduled to cease in the first quarter of 2023. Shutdown of the facility is related to the planned conversion of our San Francisco Refinery in Rodeo to one of the world’s largest renewable fuels facilities, which stands to help California meet its demand for lower-carbon transportation fuels and achieve its environmental goals.

The Santa Maria Refinery currently employs 78 employees and 53 contractors. We notified these individuals of the refinery shutdown almost two years ago and are in the process of helping our employees either remain with the company at another location or secure other job opportunities locally.

We intend to remediate the site at 2555 Willow Road in Nipomo following the shutdown. We expect the remediation process to take several years.

Before remediation can begin, we are working to secure any needed regulatory authorizations or permits from San Luis Obispo County and other regulatory agencies. We will then perform the remediation in accordance with those approvals.

We expect a decrease in overall traffic relative to current operations as the refinery stops operation and the remediation begins.