About Us

REG Mason City is a commercial-scale, state-of-the-art biodiesel production facility in Mason City, Iowa. The multi-feedstock refinery manufactures approximately 30 million gallons of high-quality biodiesel each year. REG acquired the facility in 2013.

About the REG Mason City Facility

Nameplate Capacity: 30 mmgy
Feedstock: High and low free fatty acid feedstocks
Loading Capabilities: Truck and rail
Rail Line: Dual-served — Iowa Traction junction with UP Canadian Pacific
Production Start Date: July 2007