Quick answer
Keep food cold enough to stay at 41F (5C) or below, store raw animal foods below ready-to-eat foods, keep everything off the floor on shelving that lets air move, cover and label containers, and rotate stock first in, first out. This guide reflects common food-safety practice; your local health department’s rules take priority.
Temperature and monitoring
The FDA Food Code treats 41F (5C) as the upper limit for cold-holding of foods that need time and temperature control for safety, and bacteria grow fastest between about 40F and 140F. Cooler air is usually set a few degrees below that limit, and many operators aim for roughly the mid-to-upper 30s F. Check with your local health authority for the requirement that applies to you.
- Keep a thermometer inside the cooler in addition to any built-in display. Placing one near the center, not just at the door, gives a better picture.
- Check and record temperatures regularly. A temperature alarm can warn you of a failure.
- Remember that air temperature and food temperature are different. Use a probe thermometer to confirm food itself is at a safe temperature.
- Avoid propping the door open, since the area near the door sees the biggest swings.
Shelf order to prevent cross-contamination
The usual practice is to store foods top to bottom according to the temperature they need to reach when cooked, so juices from raw items cannot drip onto foods that will not be cooked again.
- Top: Ready-to-eat foods, such as washed produce, cooked and prepared items, and deli items.
- Next: Raw seafood and whole fish.
- Next: Whole cuts of beef, pork, and similar meats.
- Next: Ground meats and ground fish.
- Bottom: Raw poultry, along with other foods requiring the highest cooking temperature.
Keep raw and ready-to-eat items in separate, covered containers whenever possible. If you have room, dedicate separate shelving to ready-to-eat foods.
Airflow, shelving, and keeping food off the floor
- Raise everything off the floor. A common minimum is 6 inches (15 cm), using shelving or approved pallets.
- Use wire shelving. It allows air to move around food and helps moisture evaporate, whereas solid shelves can block circulation.
- Do not overpack. Leave gaps between items so cold air reaches every container, and leave a few inches between food and walls. Keep air vents and the evaporator fan clear.
- Avoid cardboard where possible. Cardboard can hold moisture and encourage mold. Move items to food-safe containers when practical.
Containers, covering, and labeling
- Cover foods to prevent contamination and drying. Lids are best; plastic wrap or foil works when a lid is not available.
- Use food-grade containers made of materials that do not absorb moisture, such as stainless steel or NSF-listed plastic. Clear containers make contents easy to identify.
- Label every container with the item name, the date prepared or opened, and the use-by date. Many kitchens also include the initials of the person who prepared it.
- Store liquids and sauces in lidded containers on lower shelves to reduce spill risk.
FIFO rotation
First in, first out means older products are used first. Place new deliveries behind or beneath existing stock, check dates when you stock, and discard items that are past their use-by date. A fixed place for each product makes inventory and rotation easier. Our guide to storing nuts long term shares similar rotation habits for dry goods.
Keeping produce from getting soggy
Soggy produce usually comes from excess moisture, poor airflow, or stacking.
- Keep produce on wire shelving and avoid packing it tightly.
- Do not wash produce until you are ready to use it unless it is stored dry. Moisture encourages spoilage.
- Use breathable or ventilated containers for items that need airflow, and keep leafy greens away from the coldest air stream near the evaporator, which can cause freezing damage.
- Remove spoiled pieces promptly, since they can speed up decay in their neighbors.
- Some produce, such as tomatoes and bananas, may not belong in the cooler at all; check item-specific guidance.
Hot food and cooling
Do not put large pots of hot food straight into a cooler. Divide food into shallow containers so it cools quickly, and follow the cooling steps recommended by your local food authority. The USDA advises refrigerating perishable leftovers within 2 hours, or within 1 hour if the surrounding temperature is above 90F.
How long can food stay fresh?
It depends on the food, the temperature, and how it was handled, so no single number works. Raw meats, cooked leftovers, dairy, and cut produce have different timelines. For home storage, the USDA and FoodKeeper resources list recommended refrigerator times for specific foods, and foodservice operators should follow their local code and use date labels. Never rely on smell alone.
What is the 2-2-2 rule?
This guide could not verify a standard food-safety rule by that name, and it may mean different things in different places. The better-known guidance is the two-hour rule: perishable food should not sit at room temperature for more than 2 hours, or 1 hour when it is above 90F. If you came across “2-2-2” in a training program or workplace policy, follow that source’s definition.
Check local rules
Retail and restaurant walk-in coolers are subject to local health codes, which can differ from the general practices described here. Confirm requirements for shelving height, labeling, and temperature with your health department before you rely on any guide.