Informing the Legislature that on July 8, 2026, the Governor signed the following bill into law: HB1728 HD1 SD1 CD1 (ACT 209).

This bill, signed into law on July 8, 2026, requires all counties in Hawaii to allow the installation and operation of rainwater catchment systems on any property, regardless of whether it is connected to a public water system. The legislation defines these systems as setups that collect and store rainwater from rooftops for uses such as irrigation, toilet flushing, and cleaning. While counties must permit these systems, the law also allows local governments to require registration, inspection, or notification if necessary to protect public health or water quality. This change aims to reduce strain on public infrastructure and support sustainable water management across the state.