Landscaper and Groundskeeper Hydration: Why Heat Is the Job's Biggest Hazard

Grounds maintenance workers are more than twice as likely to be injured on the job as the average worker across all occupations, and heat is a big part of why: long hours outside in direct sun, heavy equipment, and physically strenuous tasks combine to put landscaping and tree care crews at real risk of heat exhaustion, heat stroke, and a less commonly discussed but serious condition called rhabdomyolysis — muscle breakdown triggered by exertion in hot conditions. Regular, scheduled water intake is one of the few controls that's entirely in a crew's own hands.

A Job Built Around Heat Exposure

The CDC's National Institute for Occupational Safety and Health counted more than 1.3 million grounds maintenance workers in the U.S. as of 2019, a number projected to keep growing faster than average employment. NIOSH's own bulletin on the trade cites BLS data showing grounds maintenance workers face 189 injuries per 10,000 full-time employees, versus 87 for all occupations combined — more than double — and a fatal injury rate five times the all-occupation average. Mowing, edging, mulching, planting, and tree work all happen outdoors in direct sun, often on tight timelines to get through a route before dark, which is exactly the combination of heat and sustained physical exertion that drives heat illness.

What Rhabdomyolysis Is, and Why It's Worth Knowing About

Rhabdomyolysis, or "rhabdo," is the rapid breakdown of muscle tissue, triggered by a combination of elevated core body temperature and overworked muscles. Once damaged muscle cells release their contents into the bloodstream, they can damage the kidneys and heart. NIOSH lists the warning signs as muscle cramps or aches worse than the work should cause, dark tea- or cola-colored urine, unusual fatigue, and difficulty completing routine tasks — and the agency's guidance is direct: if you suspect rhabdo, increase fluid intake and seek medical attention immediately.

The Water Schedule NIOSH Actually Recommends

NIOSH's landscaping-specific guidance calls for clean, fresh water on-site with workers encouraged to drink one cup every 15 to 20 minutes, favoring low-sugar, low-caffeine drinks and avoiding alcohol, which worsens dehydration. For sweating that continues past two hours, the guidance shifts to sports drinks with balanced electrolytes, capped at an 8 percent carbohydrate/electrolyte concentration so the drink doesn't slow fluid absorption. Regular rest breaks in shade or air conditioning, and a 7-to-14-day acclimatization period for new workers or anyone returning from more than two weeks off, round out the core protections — all of which depend on a crew actually having water within reach the whole shift, not just at a truck parked at the start of the route.

Shop NuRich

A bottle that survives a truck bed and a full route matters as much as the water inside it. The 32 oz NuRich bottle ($29.99) and 18 oz NuRich Original ($14.99) keep water cold through a shift in the sun. Browse the full lineup at livenurich.com.

This post is for general hydration information only and is not medical or occupational-safety advice. If you or a coworker show signs of heat stroke or rhabdomyolysis, stop work, get out of the heat, and seek emergency medical care immediately.

Sources: CDC/NIOSH Science Bulletin, "Reducing the Risk of Rhabdomyolysis and Other Heat-Related Illnesses in Landscaping and Tree Care Workers" (injury rates, fatality rates, rhabdo symptoms, hydration schedule, acclimatization guidance) — cdc.gov/niosh/bulletin/2021/heat-illness-landscaping.html • NIOSH 2016, Occupational Exposure to Heat and Hot Environments: Criteria for a Recommended Standard • U.S. Bureau of Labor Statistics, Grounds Maintenance Workers, Occupational Outlook Handbook • NuRich product specifications