Many Americans are showering for significantly longer than necessary, according to an environmental scientist who argues that three minutes is sufficient for most hygiene needs. The average American spends 16.1 minutes in the shower, a duration Dr. Pablo Pereira-Doel of the University of Surrey describes as excessive.
Pereira-Doel, who focuses on water efficiency, stated that a three-minute shower is adequate for washing the body. If hair washing is included, he suggests adding two more minutes for shampoo and conditioner. For those looking to conserve water further, he recommends turning off the tap while scrubbing, reducing the rinse time to one minute.
He clarified that even these short durations can include time for enjoyment under the water. However, studies indicate some individuals spend up to 40 minutes showering, often for reasons unrelated to cleanliness.
"When a shower is doing that job, its length isn’t a decision anyone is consciously making," Pereira-Doel explained, noting that activities like relaxation, self-care, or simply warming up contribute to longer shower times. Over 40% of showers observed were for non-hygienic purposes.
Several factors can influence shower duration. The type of water can play a role, with people in soft water areas tending to shower longer. This is because shampoo lathers more readily and rinses more easily in soft water, creating a more pleasant experience that encourages lingering. Evening and weekend showers also tend to be longer than morning showers due to fewer time constraints.
Low water pressure can also lead to extended shower times as individuals may stay in longer to ensure they feel adequately rinsed. Pereira-Doel also advises against the common practice of shampooing twice, suggesting it is a habit rather than a necessity for most.