ServSafe Manager guideFood-safety concepts
TCS Foods and the Temperature Danger Zone
TCS food needs time or temperature control to limit pathogen growth. The zone between 41°F and 135°F is not one four-hour rule for every food.
Short answer
The 2022 FDA Food Code defines time/temperature control for safety food as food that needs time or temperature control to limit pathogen growth or toxin formation. The definition includes raw or heat-treated animal foods, heat-treated plant foods, raw seed sprouts, cut melons, cut leafy greens, cut tomatoes, and garlic-in-oil mixtures that are not otherwise modified. Cold holding is 41°F or below and hot holding is 135°F or above. Cooling, holding, and time-as-a-control each have their own clock.
What the definition actually lists
“TCS” means time/temperature control for safety. In section 1-201.10 of the 2022 Food Code, the included examples are:
- an animal food that is raw or heat-treated
- a plant food that is heat-treated
- raw seed sprouts
- cut melons, cut leafy greens, and cut tomatoes that can still support growth
- garlic-in-oil mixtures that are not modified so they cannot support growth
A whole uncut melon is not the same example as a cut melon. A dry cracker is not on that include list. Cooked rice is a heat-treated plant food, so it belongs in the conversation even though uncooked rice does not. The definition also has pH and water-activity tables for foods that need a product assessment. Do not call every plant “TCS” or every plant “safe.”
Why 41°F to 135°F is not one rule
Cold holding keeps TCS food at 41°F or below. Hot holding keeps it at 135°F or above, with a roast exception at 130°F when that roast was cooked on the roast chart. The span between those holding lines is the range people call the temperature danger zone. Being in that range is not, by itself, a four-hour violation.
| Process | Clock | Do not swap it for |
|---|---|---|
| Cooling cooked TCS food | 70°F within 2 hours and 41°F within 6 hours total, from 135°F | A flat “four hours and then throw it out” |
| Food made from room-temperature ingredients | 41°F within 4 hours | The two-stage cooling path |
| Hot or cold holding | Stay at 135°F or above, or 41°F or below, except during prep, cooking, or cooling | A cooking temperature |
| Time as a public health control | A written procedure in section 3-501.19, with its own 4-hour or 6-hour conditions | Cooling, and not a memory of “four hours” for every pan |
Classify the food before you pick a clock.
A small sort
Say TCS or not, using only the definition above. Then check.
| Food in this example | Call | Why |
|---|---|---|
| Cut watermelon | TCS | Cut melon is named. |
| Whole watermelon | Not the named example | The cut is what the definition uses. |
| Grilled chicken, just cooked | TCS | Heat-treated animal food. |
| Uncooked dry rice in a bin | Not the named example | Heat-treated plant food is the rice case that changes the call. |
| Cooked rice for a grab-and-go bowl | TCS | Heat-treated plant food. |
The cooked chicken still has to be cooled or held. Naming it TCS does not tell you the cooling math. That math is on the cooling page.
Trust the source
Official sources
Exam policies can change. Use these primary sources for the most current details.