- Waterjets: the high pressure waterjet from a power washer is powerful enough to slice through solid materials and seriously damage a human body, causing lacerations, wounds, and even fatal injuries.
- High velocity impact: waterjets can also propel objects and debris, causing a projectile hazard that could injure eyes, skin or other body parts upon impact.
- Chemical exposure: if you are operating a pressure washer in a plant or other environment where chemicals are present, beware "upset conditions" that could result in the release of toxic fluids or gases.
- Power source: electric power washers need proper grounding to prevent an electrical hazard. Gas-powered pressure washers should never be used in enclosed spaces due to the carbon monoxide hazard.
- Slip and falls: obviously, pressure washing results in wet surfaces, increasing the risk of slips and falls.
For more information on safely operating a pressure washer, check out these recommendations from the CDC and this safety alert from Consumer Reports.