Hawaii requires people installing or repairing public drinking water systems and connected building plumbing to meet lead-content limits, with exceptions for certain repairs and equipment.
People installing or repairing public drinking water systems and connected building plumbing must meet lead limits. Certain repair joints, fixtures, and equipment are exempt.
Exceptions cover necessary cast iron repair joints, equipment used only for water people will not consume, and listed fixtures and equipment, including toilets and washing machines.
People installing or repairing covered water systems must use materials that meet the law's lead limits. The rule covers public water systems and plumbing in homes or other buildings that supplies water for people to consume and connects to a public water system. Solder and flux, materials used to join pipes, may contain no more than 0.2% lead. The surfaces that touch water in pipes, fittings, and fixtures must meet a weighted average limit of 0.25% lead, calculated under federal rules. Exceptions cover certain repair joints, equipment used only for water people will not consume, and listed fixtures and equipment. The law took effect upon approval on June 8, 2026.
The law exempts specified repair joints, fixtures, and equipment from these lead limits. These exceptions apply to the lead-material rules for installation and repair. Leaded joints are exempt only when necessary to repair cast iron pipes. Pipes, fittings, fixtures, and devices that prevent water from flowing backward are exempt when used exclusively for water not expected to be consumed by people. Exempt items include toilets, bidets, urinals, fill valves, toilet flushing valves, tub fillers, shower valves, fire hydrants, pipe connection saddles, and water distribution main gate valves at least two inches in diameter. Exempt equipment also includes clothes washing machines, emergency drench showers, emergency face wash equipment, eyewash devices, fire suppression sprinklers, steam-capable clothes dryers, and sump pumps. These exceptions took effect with the law on June 8, 2026.
No hearings or votes scheduled.