🌈 Rainbow Water & Ice
We are msha certified*

OSHA Requirements &

🧑‍💼 Arizona State Enforcement (ADOSH)

Keep your workers hydrated and healthy.  How to make sure you are complying with both OSHA and ADOSH requirements.

  • OSHA Suggested Hydration in Maricopa and Pinal Counties

    How much water by season

  • Business Responsibilities and Penalties

    Supervisor duties and penalties for failure to comply with OSHA

WORKPLACE HYDRATION REQUIREMENTS

Arizona Heat Safety (OSHA-Aligned)

Applies to all outdoor and hot-indoor work

WHY THIS MATTERS

Heat stress is a recognized workplace hazard under the Occupational Safety and Health Administration (OSHA). Employers must provide adequate drinking water and allow workers to hydrate to prevent heat illness.

⚠️ Failure to do so can result in citations and monetary penalties.

DAILY WATER INTAKE — BASELINE RULE

Daily Water Target (ounces):
👉 Body Weight (lb) × 0.55 = ounces per day

This is a minimum baseline. Heat, sun, PPE, and physical work increase needs.

AVERAGE WORKER EXAMPLES

Average Adult Male

  • Weight: ~198 lb

  • Baseline Intake:
    198 × 0.55 = ~109 oz/day
    (≈ 0.85 gallons/day)

Average Adult Female

  • Weight: ~170 lb

  • Baseline Intake:
    170 × 0.55 = ~94 oz/day
    (≈ 0.73 gallons/day)

SEASONAL HYDRATION TARGETS (ARIZONA)

🌱 SPRING (March–May)

Rising heat, acclimatization still developing

  • Men: ~109 oz/day (≈ 0.85 gal)

  • Women: ~94 oz/day (≈ 0.73 gal)

✔ Start drinking early
✔ Do not wait until thirsty

☀️ SUMMER (June–September)

Extreme heat risk in Maricopa & Pinal counties

OSHA Best Practice

  • Drink ~8 oz every 15–20 minutes during heat exposure

Practical Daily Targets

  • Men:120–150 oz/day (≈ 0.9–1.2 gallons)

  • Women:105–135 oz/day (≈ 0.8–1.05 gallons)

✔ Increase intake with sun, PPE, heavy labor
✔ Electrolytes recommended for long, sweaty shifts
✔ Water must be cool, accessible, and replenished

🍂 FALL (October–November)

Heat risk can still occur, especially early fall

  • Men: ~109 oz/day (≈ 0.85 gal)

  • Women: ~94 oz/day (≈ 0.73 gal)

✔ Maintain summer habits until temperatures consistently drop

REMEMBER

If you are thirsty, you are already behind.
Drink early. Drink often. Drink more in the heat.

SUPERVISOR REQUIREMENTS

  • Provide adequate potable water near work areas

  • Allow workers to drink frequently

  • Do not restrict hydration

  • Monitor workers for heat illness symptoms

  • Ensure access to shade or cool rest areas

OSHA ENFORCEMENT & PENALTIES

Failure to provide adequate hydration may result in citations under the General Duty Clause:

  • Serious violation: up to ~$16,500 per violation

  • Willful or repeated: up to ~$165,000 per violation

  • Failure to abate: additional daily penalties

(Amounts adjusted annually for inflation.)

🧑‍💼 Arizona State Enforcement (ADOSH)

Heat Emphasis Program

  • Arizona’s Division of Occupational Safety and Health focuses inspections on heat hazards and checks that employers provide adequate water, rest, shade, training, and acclimatization.

Guidelines Development

  • A state Heat Safety Task Force is completing guidelines to clarify employer duties under the General Duty Clause through 2025 and into 2026 — these will influence enforcement.

Penalties

  • ADOSH can issue General Duty Clause citations and fines similar to federal OSHA, with penalties reflecting gravity and employer history per state law.


REMEMBER

If you’re thirsty, you’re already behind.
Drink early. Drink often. Drink more in the heat.

 

Frequently Asked Questions

Here are some of the alternatives and what our recommendations would be...

Why not use bottled 16 oz. water?

This is often a stopgap measure attempted to satisfy OSHA & ADOSH. Here are some of the reasons why we don't recommend it:

• These bottles are crushable, which means they more than likely contain BPA or recycled plastics that may contain BPA, PFAS, and other toxins that are part of the manufacturing process. 

• These chemicals, forever plastics, and toxins leach into the water, especially in heat or non-climate-controlled environments, resulting in well-documented permanent health risks to your employees.

• 100 employees will go through 5,760 to 8,640 bottles a week, depending on the season.  Add a zero to each of those numbers if you have 1,000 employees. This causes a cleanup and janitorial service to keep your property clean and hazard-free.

• Even if 16 oz. bottles are stored in a cool environment, when a worker takes several bottles with them to their work station, the bottles lose their coolness. That starts the leaching problem again.

• A much better solution is to provide a climate-controlled mini facility where water coolers and 5-gallon water bottles are available.  Employees then fill up their own (or company-supplied) thermal containers that hold 32 to 64 ounces of cooled water. These locations are near where employees check in and where they eat lunch or take breaks. OSHA & ADOSH standards can be posted to help them avoid heat exhaustion and hospitalization. 

Eventually, we recommend installing a commercial-grade reverse-osmosis system on site, which we can install. This removes the delivery aspect as the primary source of supply, but uses it as a backup process.  We'll then professionally manage the entire hydration and compliance needs, including: distribution, ongoing maintenance, repair, testing, inspections, and other OSHA and/or ADOSH requirements.

How much water does OSHA recommend during heat exposure?

The OSHA Best Practice recommendation is ~ 8 oz every 15-20 minutes.

What Enforcement & Penalties Do OSHA & ADOSH Impose?

Failure to provide adequate hydration may result in citations under the General Duty Clause:

👉 Serious violation: up to ~$16,500 per violation
👉 Repeated or willful: up to ~$165,000 per violation
👉 Failure to abate: additional daily penalties

(The above amounts are adjusted annually for inflation.)

⚠️While hospitals do not notify OSHA or ADOSH about heat illness, employers are required to report serious work-related cases, including inpatient hospitalizations, and those reports commonly result in a safety review.

👉 Work-related heat illness is typically a Workers’ Compensation claim, and serious or repeated cases can increase claim costs, insurance premiums, and safety scrutiny.
*While there isn't a direct MSHA regulation specifically for hydration, maintaining proper hydration is crucial for preventing heat-related illnesses.

Heat stress is a condition that can occur in hot and humid mining environments. When miners are exposed to high temperatures and humidity, they can lose significant amounts of fluid through sweating. If this fluid is not adequately replaced, it can lead to various heat-related illnesses, including heat cramps, heat exhaustion, and heat stroke.

Heat cramps are painful muscle spasms that happen during profuse sweating, even if large quantities of water are consumed, because the body's salt loss is not adequately replaced. Heat exhaustion occurs when large amounts of fluid are lost with sweating, sometimes with excessive salt loss, leading to extreme weakness or fatigue, nausea, or headache. Heat stroke is a medical emergency where the body's temperature regulation fails, and the core body temperature rises above one hundred and four degrees Fahrenheit, which can be fatal if not treated quickly.

To prevent these conditions, it's important to ensure miners have access to potable water and are encouraged to drink fluids regularly, especially when working in hot environments. While the provided information mentions a case where five-gallon plastic bottles of water were deemed insufficient for a refuge chamber for ten miners over four days, highlighting the need for an unlimited water supply in emergencies, it also emphasizes the general rule of thumb for daily water requirements for humans is sixty-four ounces.

Therefore, while specific MSHA regulations on daily hydration amounts are not detailed, the best practice is to provide readily available potable water and encourage frequent hydration to prevent heat stress and related illnesses. If you have concerns about heat stress in your mine, you should contact your supervisor for further evaluation.