Two ranges, two audiences
| Food businesses: FDA Food Code 2022 | Home cooking: CDC advice | |
|---|---|---|
| Cold food | 41°F or below (3-501.16) | Refrigerator at 40°F or below (CDC) |
| Hot food | 135°F or above (3-501.16) | Not stated as a holding rule on the CDC page |
| Danger zone | Between 41°F and 135°F, where time/temperature control for safety (TCS) food may not be held | Between 40°F and 140°F (CDC) |
| Time out of the zone | Time as a public health control: 4 hours, or 6 hours for cold food kept at 70°F or less, with written procedures (3-501.19) | Never leave perishable food out more than 2 hours, or 1 hour above 90°F (CDC) |
The Food Code is the model code that states and counties adopt for restaurants, grocery stores and other food establishments. If you work in one, its numbers apply to you, and they are the ones food handler and food manager exams test.
What the danger zone means in a kitchen
The rule is not "never let food pass through the zone". Food has to pass through it when it is cooked, cooled or reheated. The Food Code limits how long it spends there:
- Holding. Cold TCS food stays at 41°F or below; hot TCS food at 135°F or above. Roasts cooked to a Food Code roast schedule may be held at 130°F (3-501.16).
- Cooling. Cooked food goes from 135°F to 70°F within 2 hours, and to 41°F or less within 6 hours in total. Food made from room-temperature ingredients, such as tuna salad from canned tuna, must reach 41°F within 4 hours (3-501.14).
- Reheating. Food cooked and cooled in-house, then reheated for hot holding, must reach 165°F for 15 seconds, and no more than 2 hours may pass between 41°F and 165°F (3-403.11).
- Thawing. In the refrigerator at 41°F or less, under running water at 70°F or below, in a microwave if cooked right away, or as part of cooking (3-501.13).
Why the first two hours of cooling matter most
The Food Code annex explains why: excessive cooling time has been consistently identified as one of the leading contributing factors to foodborne illness, and a long time between 70°F and 125°F, near ideal bacterial incubation temperatures, is to be avoided (Annex 3, 3-501.14). Getting food through 135°F to 70°F in 2 hours is the hard part: a deep, covered stockpot can stay warm for hours. The Food Code lists the ways to cool fast: shallow pans, smaller portions, rapid cooling equipment, an ice-water bath with stirring, containers that transfer heat, and ice as an ingredient (3-501.15).
If cooling goes wrong, the Food Code inspection guidance in Annex 5 sets the corrective action: cooked hot food that is above 70°F and two hours or less into cooling, and above 41°F and six hours or less into cooling, may be reheated to 165°F for 15 seconds and cooled again by a different method; food above 70°F more than two hours in, or above 41°F more than six hours in, should be thrown away immediately (Annex 5).
Using time instead of temperature
A food business may keep TCS food out of temperature control on purpose, for example sandwiches on a display, under strict conditions (3-501.19):
| Option | Starting temperature | Limit | What happens at the limit |
|---|---|---|---|
| 4 hours | 41°F or less, or 135°F or more | Marked with the time 4 hours later | Served, or thrown away |
| 6 hours (cold food only) | 41°F or less | Never above 70°F; marked with the 6-hour time | Thrown away at 6 hours, or as soon as it goes above 70°F |
Both options require written procedures kept on site. Facilities serving a highly susceptible population have extra limits.
Checking temperatures
Use a food thermometer in the thickest part of the food. A thermometer that reads only in Fahrenheit must be accurate to plus or minus 2°F (4-203.11). In a cooler, the unit's own thermometer sensor sits in the warmest part (4-204.112).
Sources
- Food Code 2022 (3-501.14 Cooling, 3-501.16 Hot and Cold Holding, 3-403.11 Reheating, 3-501.19 Time as a Public Health Control) — U.S. Food and Drug Administration (checked October 31, 2026)
- FDA Food Code 2022 — U.S. Food and Drug Administration (checked October 31, 2026)
- Four Steps to Food Safety — Centers for Disease Control and Prevention (checked October 31, 2026)
ServSafe is a registered trademark of the National Restaurant Association. passmock is not affiliated with or endorsed by the National Restaurant Association, the National Registry of Food Safety Professionals (NRFSP), Pearson VUE, Prometric, 360training, ANAB, the Conference for Food Protection, the FDA or any state or local health department.
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