summary
Introduced
01/21/2026
01/21/2026
In Committee
02/11/2026
02/11/2026
Crossed Over
Passed
Dead
Introduced Session
2026 Regular Session
Bill Summary
Requires the counties to allow for the installation and operation of rainwater catchment systems for potable and non-potable uses on all properties. Requires the counties to regulate and enforce standards for the use of rainwater catchment systems. Effective 7/1/3000. (HD1)
AI Summary
This bill requires counties in Hawaii to allow the installation and operation of rainwater catchment systems, which are defined as systems designed to collect and store rainwater from rooftops or other surfaces for both drinking water (potable) and other uses like irrigation or toilet flushing (non-potable), on all properties, regardless of whether they are connected to a county water system, which refers to public water infrastructure operated by the county. The bill also mandates that counties establish rules and ordinances to regulate and enforce standards for these systems, covering aspects like safety, maintenance, design, and preventing contamination of water sources, and allows counties to require registration or inspection if necessary for public health or water quality, but prohibits unreasonable restrictions on their use.
Committee Categories
Agriculture and Natural Resources, Justice
Sponsors (20)
Terez Amato (D)*,
Della Belatti (D)*,
Luke Evslin (D)*,
Andrew Garrett (D)*,
Tina Grandinetti (D)*,
Greggor Ilagan (D)*,
Susan Keohokapu-Lee Loy (D)*,
Darius Kila (D)*,
Matthias Kusch (D)*,
Lisa Marten (D)*,
Tyson Miyake (D)*,
Dee Morikawa (D)*,
Amy Perruso (D)*,
Mahina Poepoe (D)*,
Julie Reyes Oda (R)*,
Garner Shimizu (R)*,
Kanani Souza (R)*,
Gregg Takayama (D)*,
David Tarnas (D)*,
Scot Matayoshi (D),
Last Action
Passed Second Reading as amended in HD 1 and referred to the committee(s) on JHA with none voting aye with reservations; none voting no (0) and Representative(s) Holt excused (1). (on 02/11/2026)
bill text
bill summary
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bill summary
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bill summary
| Document Type | Source Location |
|---|---|
| State Bill Page | https://www.capitol.hawaii.gov/session/measure_indiv.aspx?billtype=HB&billnumber=1728&year=2026 |
| BillText | https://www.capitol.hawaii.gov/sessions/session2026/bills/HB1728_HD1_.HTM |
| Committee Report HB1728_HD1_HSCR200-26_ | https://www.capitol.hawaii.gov/sessions/session2026/CommReports/HB1728_HD1_HSCR200-26_.pdf |
| HB1728_TESTIMONY_WAL_02-03-26_ | https://www.capitol.hawaii.gov/sessions/session2026/Testimony/HB1728_TESTIMONY_WAL_02-03-26_.PDF |
| BillText | https://www.capitol.hawaii.gov/sessions/session2026/bills/HB1728_.HTM |
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