Abstract: A system and method for reducing microbial populations on food products in a food processing facility. One embodiment provides a combination of interventions including a liquid antimicrobial treatment station that wets a food product with an antimicrobial solution containing at least one antimicrobial agent and a gaseous antimicrobial treatment station that generates and exposes the wetted food product to advanced oxidative gaseous environment. A transport system is provided for transporting the food product between the first and second treatment stations. In one embodiment, the advanced oxidative gases may be generated by plurality of photohydroionization cells. In one embodiment, the system and method may be used in a meat processing facility.