A jobsite hydration plan that crews follow

How much should a worker drink on a hot jobsite?

NIOSH gives one clear number. For moderate activity in the heat lasting less than 2 hours, drink 1 cup (8 oz) of water every 15 to 20 minutes. NIOSH adds that fluid intake generally should not exceed 6 cups per hour. Build your plan inside those two lines.

That works out to a small, steady habit, not a big drink at lunch. Thirst is a late signal. A crew that waits for thirst starts behind. A crew that sips on a schedule stays closer to even. Read more about hydration and dehydration in our glossary.

What goes in a written jobsite hydration plan?

A written plan names who brings water, where it sits, how often crews drink and what happens when someone feels sick. NIOSH tells employers to provide the means for appropriate hydration, so the plan is part of your duty to look after the crew. Keep it to one page.

Use these seven steps:

1. Estimate the volume. NIOSH says to estimate how much water will be needed. Start with crew size, shift length and the heat forecast. Add a buffer.
2. Name the owner. Decide who gets the water and who checks the supplies. Write the name in the plan.
3. Place the water. Make water accessible near the work area. A cooler at the gate does not count when the crew is 300 feet away.
4. Keep it cool. Water should be under 59°F. Use ice, shade and insulated containers.
5. Supply cups. Give each worker an individual cup or bottle.
6. Set the pace. Remind crews to drink 1 cup every 15 to 20 minutes during moderate work in the heat. Use a timer, a radio call or a foreman rule.
7. Add an electrolyte step for long sweats. See the next section.

Pair the plan with water, rest and shade, a work/rest schedule and acclimatization for new hires. Hydration alone does not control heat. Our heat stress prevention pillar shows how the pieces fit, and the heat stress program guide covers the full program.

When do crews need electrolytes, not just water?

When sweating lasts for several hours, water alone may not be enough. NIOSH says to drink sports drinks containing balanced electrolytes in that case. NIOSH also describes heat exhaustion as the body’s response to an excessive loss of water and salt, usually through excessive sweating.

Sweat carries salt out with the water. A long, hot shift loses both. That is why many safety managers add an electrolyte step for shifts that run past the 2-hour mark. Compare your options in electrolytes vs water on long shifts and electrolyte drops vs sports drinks.

JMAR makes Rapid Restoration Drops, a dietary supplement. The drops replace electrolytes lost in sweat and support hydration. They have no sugar and no calories, and the label lists magnesium, chloride, sodium and potassium. They are not medicine and do not replace water, rest, shade or medical care. Read the product page for the full label and suggested use, and see electrolytes 101.

How do you keep crews from overdrinking?

Teach the ceiling as well as the pace. NIOSH says fluid intake generally should not exceed 6 cups per hour. Drinking much more than the body loses can dilute blood sodium. Our hyponatremia guide explains the warning signs and what a supervisor should do.

Keep the message simple:

• Sip on a schedule. Do not chug.
• Do not force fluids on someone who feels sick.
• Report headache, nausea or confusion right away.
• If someone is confused or acting strangely, call 911.

How do you check that the plan works?

Check the plan at the start of every shift and after any heat event. Ask four questions: Was water at the work area? Was it cool? Did crews drink on the schedule? Did anyone report symptoms? Write the answers on the foreman’s daily sheet.

NIOSH also says training should teach workers about drinking enough water and monitoring the color and amount of urine output. Use a buddy system so workers watch each other. Review the log weekly. Move water closer, add stations or change the break pattern when the log shows gaps.

For a ready talk, use the heat toolbox talk script. To check how the heat itself is measured, see WBGT vs heat index.

Does Texas require water breaks?

Texas HB 2127 ended local rules in Austin and Dallas that set minimum water breaks. That does not remove your duty to protect workers. Federal OSHA can still cite heat hazards under the General Duty Clause. A written hydration plan is a practical way to show you looked after the crew. See Texas heat rules for employers. This is not legal advice.

What does a hydration day look like on a 10-hour shift?

Here is an example schedule. It is an illustration, not a NIOSH table. It applies the NIOSH pace of 1 cup every 15 to 20 minutes during moderate work in the heat, and it stays under the 6-cup-per-hour ceiling. Adjust the times and the amounts with your safety team.

Notice that the plan does not ask anyone to drink a large amount at once. It asks for a steady habit, with a ceiling.

Who does what?

A plan fails when everyone assumes someone else owns the water. Name the roles in writing. NIOSH says employers should decide who will get and check on water supplies, so the plan must name that person.

• Safety manager: writes the plan, sets the pace and the ceiling, reviews the log.
• Foreman or crew lead: runs the morning check, prompts sips, calls breaks.
• Water owner: fills and checks the coolers, cups and ice.
• Every worker: drinks on the schedule, tells the lead about symptoms and watches a buddy.

What mistakes do jobsite hydration plans make?

Most failures are about place and habit, not knowledge. Crews know water matters. They fail when the water is warm, far away or forgotten. Watch for these four gaps, and fix them first.

• Water too far away. NIOSH says to make water accessible near the work area.
• Water too warm. NIOSH says under 15°C (59°F).
• Shared cups or no cups. NIOSH says to provide individual cups for each worker.
• Wrong drinks. NIOSH says to avoid alcohol and drinks with high caffeine or sugar.

Fix one gap per week. After a month the plan runs on its own.

Next step

Want help writing a hydration plan for your crews? Book a 15-minute demo, ask for a free sample or request bulk pricing. JMAR’s hydration programs include onsite toolbox talks.