A showerhead with multiple nozzles constitutes a single showerhead for purposes of EPCA’s water conservation standard. Thus, the Department has authority to take enforcement action against the manufacturers of multiple nozzle showerheads which exceed the 2.5 gpm maximum. The Department understands that some manufacturers may have made design and production decisions based on their apparent misunderstanding of how to measure compliance with Congress’ 2.5 gpm standard. The Department will provide an enforcement grace period of two years (until March 4, 2013) to allow such manufacturers to sell any remaining non-compliant multi-nozzle products and to give manufacturers the opportunity to adjust their product designs in order to ensure compliance with EPCA and the Department’s regulations.