New FAO Review Highlights Top Food Safety Priorities for CEA Growers
September 2, 2025 
Photo: Adobe Stock
The Food and Agriculture Organization of the United Nations (FAO) has released its first-ever global review of food safety hazards, controls, and regulatory considerations for modern indoor farming. The 104-page report brings together scientific evidence and regulatory perspectives that directly affect how commercial CEA operations grow, monitor, and market produce.
CEA has often been described as safer than open-field agriculture because production occurs in enclosed environments that reduce exposure to soilborne pathogens, wildlife, and weather-related contamination. The FAO review acknowledges these advantages but also notes that indoor conditions can create different challenges. Pathogens such as Salmonella, Listeria monocytogenes, and Shiga-toxin producing E. coli (STEC) may persist in water systems, biofilms, and substrates if not properly managed, making careful monitoring and control essential for crops consumed raw.
The report highlights several priority areas for commercial operators:
1. Seed and Propagule Safety
Seeds, plugs, and other starting materials can be a primary contamination source—especially for microgreens and baby greens. FAO urges farms to verify seed suppliers and, where possible, use validated decontamination steps. This represents a shift from field-based food safety rules, where seeds are rarely a central focus.
2. Water Management in Recirculating Systems
Unlike conventional farms, many CEA operations reuse water continuously. FAO warns that pathogens can build up in these systems if not properly managed. The recommendation: Establish strict criteria for source water, treat and monitor recirculating nutrient solutions, and validate interventions such as UV or filtration.
3. Hygienic Design and Sanitation
Smooth floors and drains, easy-to-clean trays, and materials that resist biofilm growth are important system elements. The report suggests that hygienic design principles, already familiar to food processors, need to be applied in CEA facilities. Equally important is a strong sanitation verification program to ensure biofilms are eliminated.
4. Environmental Monitoring Programs (EMP)
FAO calls for robust EMPs, with a special emphasis on Listeria. That means routine swabbing of drains, racks, and other potential harborage sites, plus a “seek and destroy” culture when positives appear.
5. Special Considerations for Aquaponics
CEA operations that integrate fish with produce must manage additional risks. The FAO recommends documented physical and microbial barriers to prevent fish-associated pathogens from contaminating ready-to-eat crops.
Beyond technical controls, the FAO review maps how current regulations—from the U.S. Food Safety Modernization Act to private certification programs benchmarked against the Global Food Safety Initiative—do and don’t align with indoor production realities. Gaps remain in areas like water testing frequencies and microgreen-specific standards, suggesting that new rules may follow in coming years.
You can access the full report on the FAO website.