Commercial food service environments — restaurant kitchens, catering operations, institutional food preparation facilities, and food manufacturing plants — rely on extensive cleaning and sanitization protocols that use large volumes of water. In areas with PFAS-contaminated water supplies, the cleaning water itself can introduce PFAS onto food contact surfaces, into cooking vessels, and potentially into food products. Food service operators in PFAS-affected areas face both food safety and regulatory considerations that are only beginning to receive appropriate attention.
The Cleaning and Sanitization Water Pathway
Commercial kitchens use water in cleaning at multiple critical control points:
Ware washing (dishes, pots, pans): Commercial dishwashers rinse food contact equipment with hot water at 180°F or higher to achieve sanitization. PFAS in the rinse water contact clean equipment surfaces that will subsequently contact food. While much of the water drains off, some residual water (with its PFAS load) remains on equipment surfaces.
Food contact surface sanitization: Cutting boards, prep tables, and other surfaces are regularly sanitized with water-based solutions. PFAS from contaminated water can remain on surfaces after sanitization if final rinse water is not PFAS-free.
Produce washing: Fresh produce is washed in commercial food service settings with tap water. PFAS in wash water contact produce surfaces and can partially absorb into porous produce items.
Ice for food and beverages: Ice served in beverages or used to chill food products is made from tap water. Any PFAS in the source water is present in the ice at the same concentration.
Commercial Ice Maker Considerations
Commercial ice makers in food service settings deserve specific attention. Unlike residential ice makers that produce relatively small volumes, commercial units may produce hundreds of pounds of ice per day — all from tap water. In PFAS-contaminated areas, this represents a significant daily introduction of PFAS into beverages served to customers.
Studies of PFAS in commercial ice from various municipal water sources have found PFAS concentrations tracking source water levels, as expected. Ice served in beverages constitutes direct PFAS ingestion by customers who may not be aware of their local water contamination status.
Point-of-use filtration at commercial ice maker water supply connections — using certified RO or high-capacity carbon block filters — is a straightforward intervention that food service operators in PFAS-affected areas should consider.
Regulatory Framework for Food Service Water Quality
Food service facilities are regulated under multiple overlapping frameworks:
- FDA’s Food Safety Modernization Act (FSMA) requires that water used in food preparation meets applicable quality standards
- State and local health department food service codes specify water potability requirements, typically by reference to Safe Drinking Water Act standards
- EPA’s 2024 PFAS NPDWR establishes MCLs that public water systems serving food service facilities must meet at the meter
Food service operators whose water supply meets the EPA MCLs at the meter are in regulatory compliance even if those levels exceed health-based recommendations, particularly for sensitive populations. However, reputational and liability considerations argue for proactive filtration.
Practical Implementation for Food Service Operators
Food service operators in PFAS-affected areas should implement a layered approach:
- Test water: Annual PFAS testing of all water supply points used in food service operations establishes baseline and monitors for changes
- Prioritize critical points: If full facility treatment is not immediately feasible, prioritize filtration for ice makers, beverage equipment water lines, and produce wash stations
- Select certified systems: NSF/ANSI 58-certified RO systems for high-volume points; NSF/ANSI 53-certified carbon block filters for lower-volume applications
- Document and maintain: Keep records of filtration installation, maintenance, and annual water testing as part of food safety documentation
- Communicate proactively: In markets where food safety consciousness is high, transparent communication about water quality management supports consumer trust