Hawaii · 2026 Regular Session · Bill
HB 1728: RELATING TO RAINWATER CATCHMENT SYSTEMS.
Enacted Official data
- Introduced
- In committee
- Passed one chamber
- Passed both chambers
- Enacted
Last official action: ·Record last updated:
Plain-language summary
HB 1728 is a bill introduced in the Hawaii House on January 20, 2026. According to its official title, it concerns: RELATING TO RAINWATER CATCHMENT SYSTEMS. Primary sponsor: Mahina Poepoe (Democratic), Julie Reyes Oda (Republican), Garner Shimizu (Republican), Luke Evslin (Democratic), Kanani Souza (Republican), Gregg Takayama (Democratic), David Tarnas (Democratic), Terez Amato (Democratic), Della Belatti (Democratic), Andrew Garrett (Democratic), Tina Grandinetti (Democratic), Greggor Ilagan (Democratic), Sue Lee Loy (Democratic), Darius Kila (Democratic), Matthias Kusch (Democratic), Lisa Marten (Democratic), Tyson Miyake (Democratic), Dee Morikawa (Democratic), Amy Perruso (Democratic). It lists 1 additional sponsor. Most recent recorded action (July 9, 2026): Act 209, 07/08/2026 (Gov. Msg. No. 1311).
Generated automatically from the official title, sponsor list, and status record only. It does not characterize the bill’s purpose or effects. How summaries are written
Official summary
Abstract published by the legislature (via Open States). Text as published by the legislature; reproduced verbatim.
Requires the counties to allow for the installation and operation of rainwater catchment systems for potable and nonpotable uses on all properties. Allows the counties to require registration, inspection, or notification of rainwater catchment systems. (CD1)
Sponsors
Sponsors by party (alphabetical): Democratic 17 · Republican 3
| Name | Role | Party | Chamber | District |
|---|---|---|---|---|
| Mahina Poepoe | Primary sponsor | Democratic | House | 13 |
| Julie Reyes Oda | Primary sponsor | Republican | House | 40 |
| Garner Shimizu | Primary sponsor | Republican | House | 32 |
| Luke Evslin | Primary sponsor | Democratic | House | 16 |
| Kanani Souza | Primary sponsor | Republican | House | 43 |
| Gregg Takayama | Primary sponsor | Democratic | House | 34 |
| David Tarnas | Primary sponsor | Democratic | House | 8 |
| Terez Amato | Primary sponsor | Democratic | House | 11 |
| Della Belatti | Primary sponsor | Democratic | House | 26 |
| Andrew Garrett | Primary sponsor | Democratic | House | 22 |
| Tina Grandinetti | Primary sponsor | Democratic | House | 20 |
| Greggor Ilagan | Primary sponsor | Democratic | House | 4 |
| Sue Lee Loy | Primary sponsor | Democratic | House | 2 |
| Darius Kila | Primary sponsor | Democratic | House | 44 |
| Matthias Kusch | Primary sponsor | Democratic | House | 1 |
| Lisa Marten | Primary sponsor | Democratic | House | 51 |
| Tyson Miyake | Primary sponsor | Democratic | House | 10 |
| Dee Morikawa | Primary sponsor | Democratic | House | 17 |
| Amy Perruso | Primary sponsor | Democratic | House | 46 |
| Scot Matayoshi | Co-sponsor | Democratic | House | 49 |
“Support” is shown only as formal sponsorship recorded by the legislature. Roll-call votes are available on the official bill page.
Recent official actions
- Act 209, 07/08/2026 (Gov. Msg. No. 1311).
- Act 209, on 07/08/2026 (Gov. Msg. No. 1311).
- Received notice of passage on Final Reading in House (Hse. Com. No. 888).
- Transmitted to Governor.
- Passed Final Reading, as amended (CD 1). Ayes, 25; Aye(s) with reservations: none . 0 No(es): none. 0 Excused: none.
- Passed Final Reading as amended in CD 1 with none voting aye with reservations; none voting no (0) and none excused (0).
- Received notice of Final Reading (Sen. Com. No. 816).
- The Conference committee recommends that the measure be PASSED, WITH AMENDMENTS. The votes of the Senate Conference Managers were as follows: 3 Aye(s): Senator(s) Wakai, San Buenaventura, Fevella; Aye(s) with reservations: none ; 0 No(es): none; and 1 Excused: Senator(s) Lee, C..
- The Conference Committee recommends that the measure be Passed, with Amendments. The votes were as follows: 3 Ayes: Representative(s) Hashem, Tarnas, Souza; Ayes with reservations: none; 0 Noes: none; and 0 Excused: none.
- Reported from Conference Committee (Conf Com. Rep. No. 84-26) as amended in (CD 1).
- Forty-eight (48) hours notice Wednesday 05-06-26.
- Reported from Conference Committee as amended CD 1 (Conf. Com. Rep. No. 84-26).
Showing 12 most recent of 40 actions. Full history