Replacement Shower Head Flow Rate Requirements

In 1992, a federal mandate limited the amount of water that could flow from a replacement shower head to 2.5 gallons per minute (GPM). Some state and local governments mandate even lower GPM flow rates than the federal regulation.

The table below shows the maximum flow rate for a replacement shower head that can be sold at retail in various states/regions within the US:

* Only regulatory requirements related to retail sales of replacement shower heads are shown. Unique requirements often exist for new construction
State Current Max Flow Rate For Retail Sales of Replacement Shower Heads* Planned Changes
California 1.8 GPM None
Colorado 2.0 GPM None
Hawaii 1.8 GPM None
Massachusetts 2.5 GPM Moving to 2.0 GPM for all products sold on or after 1/1/22
New York 2.5 GPM Moving to 2.0 GPM for all products sold on or after 1/1/22
Note: Special regulation currently in place in New York City 2.0 GPM (NYC) None
Oregon 2.5 GPM Moving to 1.8 GPM for all products sold on or after 1/1/22
Vermont 2.0 GPM for all products sold on or after 7/1/21 None
Washington 1.8 GPM for all products manufactured on or after 1/1/21 None
All states not shown 2.5 GPM None

Shop Shower Heads