How Should Cutting Boards Be Separated and Stored to Prevent Cross-Contamination?

Cutting boards should be kept from cross-contamination by separating them by color or label, with each board used only for its own food category; the most common system is one board for red meat, a separate one for poultry, and a third for fruit and vegetables. That separation should hold both while cutting and while storing; leaving a small gap between different-colored boards on the rack, rather than stacking them flush, also helps avoid grabbing the wrong one by mistake. Why do you need more than one board?The microscopic scratches on a board used for raw meat or poultry can harbor microorganisms even after washing. If the same board is used right afterward for salad ingredients, those microorganisms can transfer to vegetables that will be eaten raw. A color-coded system (commonly red for meat, yellow for poultry, green for produce, blue for fish) prevents that transfer with a visual reminder. Separating wood from plastic boards matters too; wooden boards are harder to clean after raw meat because their porous surface draws liquid in, so plastic boards are the better choice for raw meat and poultry. In kitchens without a fourth board for fish, put fish last in the cutting order and do not use that board for anything else until the smell has cleared. How should they be cleaned between uses?After every use, a board should be washed in hot soapy water, and after cutting raw meat it should additionally be flooded with a solution of 1 tablespoon (15 ml) of unscented liquid chlorine bleach per gallon (about 4 liters) of water, left for several minutes, and then rinsed well with plain water. Dishwasher-safe plastic boards get a more reliable clean thanks to the high heat. Scrubbing a wooden board with half a lemon and coarse salt instead of a sponge clears odor while keeping the surface from getting too waterlogged. What matters when storing them?Boards should be fully dry before being stacked, and stored upright in a well-ventilated board rack; stacking damp boards speeds up mold growth. Wooden boards should occasionally get a thin coat of mineral oil, which keeps surface cracks from deepening. When should a board be replaced?A board with deep grooves, darkened color, or a smell that persists after washing should be replaced; deep scratches can hold onto more microorganisms than can be properly cleaned out. As a rule of thumb, a heavily used plastic board is worth replacing every 1 to 2 years; a wooden board can be refreshed by sanding the surface, but if deep cracks remain after sanding, it is time to retire it. What if you only have one board?In small kitchens where only one board is available, order matters: cut fruit and vegetables first, then cooked food, and raw meat or poultry last. After raw meat, the board must be washed in hot soapy water before it touches anything else. Buying a second, inexpensive plastic board is the most practical long-term fix for a one-board kitchen.