The 70°F limit in the six-hour time-control method

Time as a public health control lets an establishment use time instead of temperature control for eligible TCS food, but the method depends on written procedures and reliable marking. The six-hour option has a key temperature ceiling: cold food that starts at 41°F or below may not exceed 70°F during the six-hour period.

Start cold and mark the discard time

The food must begin at 41°F (5°C) or less. The establishment marks the time when food leaves temperature control and the time it must be discarded, which is no later than six hours after removal. The person in charge must ensure the food is discarded when the time expires. It cannot be returned to refrigeration to restart the clock.

The 70°F ceiling is a discard trigger

During the six-hour period, the food may not exceed 70°F (21°C). If a thermometer shows 72°F after four hours, the establishment has exceeded the limit and must discard the food, even though two hours remain on the marked clock. The time limit and temperature ceiling are separate safeguards; meeting one does not excuse failure of the other.

Do not confuse the six-hour and four-hour options

The Food Code also contains a four-hour time-control option with different conditions. In general, that option may begin with food at a safe temperature and requires discarding by the four-hour mark; it does not use the same 70°F ceiling as the six-hour cold-food option. Do not mix the limits or labels between the two procedures.

Operational controls

• Use a written procedure approved under the adopted local code.
• Record start and discard times on each pan or batch.
• Use a calibrated thermometer to verify cold food begins at 41°F or less.
• For the six-hour option, monitor temperature so food does not exceed 70°F.
• Discard food when the time expires or when the six-hour temperature ceiling is exceeded.
• Train staff not to reset the clock by chilling food or transferring it to a new container.

When an establishment uses time rather than temperature as the public-health control for TCS food, the Food Code offers defined methods with different conditions. Under the six-hour method, food starts at 41°F or less, may rise above that temperature, and must never exceed 70°F during the six-hour period. The four-hour method has a different starting and discard framework. A manager cannot combine the most convenient parts of each method. Use the written procedure and exact option adopted by the jurisdiction.

Start and mark the clock correctly

The six-hour period begins when the food is removed from temperature control. Mark the time or use another approved method that makes the discard deadline clear to every employee. If the establishment cannot monitor the food continuously to ensure it stays at or below 70°F, use a method that permits it to be discarded at the four-hour point or follow local direction. Never reset the clock by moving food to another pan, changing shifts or placing it briefly in a cooler unless the applicable procedure expressly allows it.

Monitor the upper temperature boundary

The 70°F limit is not an endpoint to aim for; it is the maximum temperature permitted during the six-hour method. Use a calibrated thermometer and check representative food at times that reflect the operation’s risk. A room-temperature salad can warm faster than a dense food, and an outdoor buffet can face changing ambient conditions. If temperature exceeds 70°F or records are missing so safety cannot be verified, discard the food under the corrective procedure. Do not chill it again and restart a new six-hour period.

Worked example

A pan of cut tomatoes begins at 39°F and is removed at 10:00 a.m. for a six-hour time-control procedure. It must be marked with the discard time and monitored so it does not exceed 70°F. The deadline is 4:00 p.m.; if it reaches 71°F at 1:30 p.m., it has violated the method and should be discarded immediately. If the employee cannot monitor its temperature, the establishment should use the shorter allowed procedure instead. The person in charge should document the disposition and fix the monitoring gap before the next batch.

Exam takeaway

Remember the paired conditions: start at 41°F or below, remain at or below 70°F, and discard within six hours under the compliant written procedure. Missing a time mark, exceeding the upper limit or losing control of monitoring means the establishment cannot rely on the six-hour option. Time control is an approved alternative, not permission to leave food unattended. Distinguish this from the four-hour method and from ordinary cold holding at 41°F or below.

Run a shift-level verification

Before using six-hour time control, write the procedure for each food and service area, including starting temperature, marking method, monitoring responsibility and discard action. Train relief staff to recognize the mark and deadline. Food placed on display without a start time cannot be assigned a guessed clock later. If the operation cannot make a reliable 70°F check, choose a permitted method with a shorter discard time. Keep the log beside the station so the record is made when the food is removed from refrigeration.

Supervisor verification

The person in charge should check the log near the discard deadline and remove food before the deadline passes. Employees should not rely on memory or write the time after service. When food is split into multiple pans, each pan needs a traceable start and discard time under the procedure. If pans are combined, follow the approved method for determining the controlling time; do not give older food a fresh mark.

Key takeaway

For the six-hour cold-food method, remember: start at 41°F or below, mark the discard time, and never let the food exceed 70°F. If it reaches 72°F at hour four, discard it then.