Shower flow limits in Alabama
Shower flow is measured in gallons per minute (GPM): how much water leaves the showerhead each minute. Water pressure is a different measure, in pounds per square inch (PSI): the force pushing water through your pipes. A showerhead's GPM rating sets the most water it can deliver; your home's pressure decides how forceful that water feels.
Alabama follows the federal limit: new showerheads sold in the US can use no more than 2.5 GPM, measured at 80 PSI. Alabama hasn't set a stricter limit for showerheads sold in the state.
In 2025, the US Department of Energy changed how the federal limit applies to showers with several nozzles, so multi-head fixtures are no longer capped at 2.5 GPM combined. Single showerheads are still limited to 2.5 GPM.
Many showerheads use less than the legal maximum. Models with the EPA WaterSense label use 2.0 GPM or less. If your shower feels weak, the cause is usually low water pressure in your home, a clogged showerhead or a flow restrictor, rather than the flow limit itself. Your utility can tell you the typical water pressure in your area.
