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OSHA & Electrolyte Replacement
What OSHA, NIOSH, and the CDC recommend for electrolyte replacement on the job, and how to keep your crew hydrated, productive, and protected in the heat.
When crews work in the heat, plain water is not always enough. Replacing lost electrolytes is a core part of every credible heat-illness-prevention program. Here is what the federal guidance actually says, how to put it into practice, and how the right products help your safety officers stay ahead of OSHA heat requirements.
Hydration by the numbers
- 1 cup (8 oz) of cool water every 15 to 20 minutes, which is roughly 1 quart per hour during heat exposure.
- 2 or more hours of work or heavy sweating means you should add electrolytes, not just water.
- Do not exceed 48 oz (6 cups) per hour, or about 12 quarts per day. Over-drinking plain water is dangerous (see the warning below).
Who sets the guidance
There is no single federal electrolyte law. The recommendations come from three U.S. authorities:
- NIOSH (part of the CDC), the primary scientific authority on occupational heat exposure.
- OSHA, which turns that science into workplace guidance (Water. Rest. Shade.) and enforces heat hazards under the General Duty Clause and its Heat National Emphasis Program.
- U.S. Army / DoD (USARIEM), which publishes the most specific work, rest, and fluid-intake tables for field conditions.
Water vs. electrolytes: when does each matter?
The trigger is duration and sweat loss:
| Situation | What to provide |
|---|---|
| Work under about 2 hours, moderate conditions | Cool drinking water is generally sufficient. |
| Work 2 or more hours, or heavy and prolonged sweating | Replace electrolytes (sodium, potassium) with balanced electrolyte drinks or salted foods. Water alone is not enough. |
Workers lose salt and electrolytes through sweat. Significant loss leads to muscle cramps and, in severe cases, contributes to heat exhaustion and heat stroke. Learn more in our guide to the importance of electrolytes.
The electrolyte-replacement protocol
1. Drink early and often
Do not wait until workers are thirsty. Provide cool water and encourage about 1 cup every 15 to 20 minutes throughout the shift.
2. Add electrolytes for prolonged exposure
For jobs of 2 or more hours, or heavy sweat, supply balanced electrolyte beverages such as Gatorade or Sqwincher, or pair water with salted snacks and regular meals.
3. Respect the upper limit
More is not better. Capping intake protects workers from water intoxication (see the warning below).
⚠ The hidden danger: hyponatremia. Drinking too much plain water dilutes the body's sodium to dangerous levels, a condition called hyponatremia (water intoxication) that can be life-threatening. This is the core reason electrolytes matter: they protect workers from both dehydration and over-hydration. Never exceed about 48 oz per hour.
What OSHA and NIOSH advise against
- Salt tablets, which are not recommended unless specifically directed by a physician.
- Energy drinks, high-caffeine drinks, and alcohol, which can worsen dehydration.
- Very high-sugar beverages. Guidance favors diluting sugary drinks or choosing lower-sugar and sugar-free options to limit sugar across a workforce.
How Hydration Depot helps you stay covered
We supply the balanced electrolyte beverages this guidance points to, built for crews, jobsites, municipalities, special events, and large industrial buyers:
- Electrolyte drink mixes and concentrates from Gatorade and Sqwincher in bulk, single-serve, and freezer-pop formats.
- Lower-sugar options in our Zero Sugar and Sugar-Free line, which aligns with the recommendation to limit sugar.
- Grab-and-go formats like single-serve packets and electrolyte freezer pops for the field.
Build a heat-safety hydration program that runs itself
Keep crews stocked all season with our exclusive Bundles and the Workforce Hydration Program, both with auto-ship, so you never run out on a hot day.
Workforce Hydration Program Shop Exclusive Bundles