About Us

With the vision of supplying California's Central Valley, Valley DEF began making and blending DEF in Central California in 2023. The production was originally directed to large transportation agencies in Central and Northern California. As it expanded, we have prided ourselves in serving our agricultural community with supplying the needs to keep companies running forward.

Valley DEF has continued to expand their customer base to focus on all markets utilizing Selective Catalytic Reduction (SCR) technology, including off-road, trucking, and many other operations.

We pride our company in manufacturing DEF with pure reverse osmosis water from our state-of-the-art pure reverse osmosis water system from SCR Solutions. Our blending plant allows for consistent DEF production and the best product on the market.

Located in Merced, California, we are located in the heart of the Central Valley, in between Highway 99 and Interstate 5. We produce and deliver to customers in the Central Valley, and Northern California including port deliveries in Oakland and Stockton.