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Turn off the tap while brushing
Water avoided equals tap flow multiplied by the time it stays off.
One possibility
Another possibility01 / Why this can helpWhat changes the result
Keep any water still needed for rinsing separate from the estimate.
02 / One possible next stepWet your brush, close the tap while brushing, and use only the water you need to rinse.
03 / Sources and scopeUS EPA · WaterSense ↗References in the original project +
EPA WaterSense (2023); Water Research Foundation (2020)
These bibliographic references come from the original cards. They provide context; they do not validate every numerical assumption below.
