water-efficient plumbing fixtures

HB 2548 establishes new water efficiency standards for plumbing fixtures in Arizona, effective January 1, 2028, for new residential construction and commercial, industrial, or public buildings. The bill requires faucets (max 3 gallons per minute in residential, 0.5 gallons per minute in commercial), shower heads (max 3 gallons per minute), toilets (max 1.6 gallons per flush), and urinals (max 1 gallon per flush) to meet these flow limits or be certified as Watersense-labeled. It also mandates the use of water-free urinals in all new state buildings, updating an existing requirement. These changes aim to reduce water consumption in building construction and renovations by setting measurable, enforceable standards.