Bill Commons

HI HB 1728

enacted

RELATING TO RAINWATER CATCHMENT SYSTEMS.

Hawaii · 2026 Regular Session · lower

Follow this bill’s action updates (Atom)

Subscribe in a feed reader. The feed covers recorded actions from the last 30 days; Bill Commons may record an action after it happened at the legislature.

Quick answers

Did HI HB 1728 pass?

Yes. HI HB 1728 has been enacted into law. Latest recorded action (2026-07-09): Act 209, 07/08/2026 (Gov. Msg. No. 1311).

What is HI HB 1728 about?

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)

Who sponsors HI HB 1728?

POEPOE, EVSLIN, AMATO and 16 others are the primary sponsors of HI HB 1728, joined by 1 cosponsor.

Description

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)

Introduced
2026-01-21
Latest action
2026-07-09 — Act 209, 07/08/2026 (Gov. Msg. No. 1311).
Bill type
bill
Last updated
—

Subjects

Sponsors

  • POEPOEprimary
  • EVSLINprimary
  • AMATOprimary
  • BELATTIprimary
  • GARRETTprimary
  • GRANDINETTIprimary
  • ILAGANprimary
  • KEOHOKAPU-LEE LOYprimary
  • KILAprimary
  • KUSCHprimary
  • MARTENprimary
  • MIYAKEprimary
  • MORIKAWAprimary
  • REYES ODAprimary
  • SHIMIZUprimary
  • SOUZAprimary
  • TAKAYAMAprimary
  • TARNASprimary
  • PERRUSOprimary
  • Matayoshicosponsor

Committees

Not provided by source.

Action timeline

Newest first

  1. 2026-07-09

    Act 209, 07/08/2026 (Gov. Msg. No. 1311).

    became-law

  2. 2026-07-09

    Act 209, on 07/08/2026 (Gov. Msg. No. 1311).

    became-law

  3. 2026-05-08

    Received notice of passage on Final Reading in House (Hse. Com. No. 888).

    receipt

  4. 2026-05-07

    Transmitted to Governor.

  5. 2026-05-06

    Passed Final Reading, as amended (CD 1). Ayes, 25; Aye(s) with reservations: none . 0 No(es): none. 0 Excused: none.

    passage

  6. 2026-05-06

    Passed Final Reading as amended in CD 1 with none voting aye with reservations; none voting no (0) and none excused (0).

    passage

  7. 2026-05-06

    Received notice of Final Reading (Sen. Com. No. 816).

    receipt

  8. 2026-04-29

    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..

    committee-passage-favorable

  9. 2026-04-29

    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.

    committee-passage-favorable

  10. 2026-04-29

    Reported from Conference Committee (Conf Com. Rep. No. 84-26) as amended in (CD 1).

  11. 2026-04-29

    Forty-eight (48) hours notice Wednesday 05-06-26.

  12. 2026-04-29

    Reported from Conference Committee as amended CD 1 (Conf. Com. Rep. No. 84-26).

  13. 2026-04-29

    48 Hrs. Notice (as amended CD 1) 05-06-26

  14. 2026-04-27

    Conference committee meeting scheduled for 04-29-26 10:50AM; Conference Room 325.

  15. 2026-04-20

    House Conferees Appointed: Hashem, Tarnas Co-Chairs; Souza.

  16. 2026-04-20

    Received notice of appointment of House conferees (Hse. Com. No. 786).

    receipt

  17. 2026-04-20

    Senate Conferees Appointed: Wakai Chair; Lee, C., San Buenaventura Co-Chairs; Fevella.

  18. 2026-04-20

    Received notice of Senate conferees (Sen. Com. No. 713).

    receipt

  19. 2026-04-17

    Received notice of disagreement (Hse. Com. No. 780).

    receipt

  20. 2026-04-16

    House disagrees with Senate amendment (s).

    amendment-failure

  21. 2026-04-14

    Report adopted; Passed Third Reading. Ayes, 25; Aye(s) with reservations: none . Noes, 0 (none). Excused, 0 (none). Transmitted to House.

    passage

  22. 2026-04-14

    Returned from Senate (Sen. Com. No. 614) in amended form (SD 1).

  23. 2026-04-10

    Reported from JDC (Stand. Com. Rep. No. 3748) with recommendation of passage on Third Reading.

  24. 2026-04-10

    One Day Notice 04-14-26.

  25. 2026-04-07

    The committee(s) on JDC recommend(s) that the measure be PASSED, UNAMENDED. The votes in JDC were as follows: 4 Aye(s): Senator(s) Rhoads, Gabbard, Chang, San Buenaventura; Aye(s) with reservations: none ; 0 No(es): none; and 1 Excused: Senator(s) Awa.

    committee-passage-favorable

  26. 2026-04-01

    The committee(s) on JDC will hold a public decision making on 04-07-26 10:15AM; Conference Room 016 & Videoconference.

  27. 2026-03-30

    Reported from EIG/WLA (Stand. Com. Rep. No. 3258) with recommendation of passage on Second Reading, as amended (SD 1) and referral to JDC.

  28. 2026-03-30

    Report adopted; Passed Second Reading, as amended (SD 1) and referred to JDC.

    passage,reading-2,referral-committee

  29. 2026-03-19

    The committee(s) on WLA recommend(s) that the measure be PASSED, WITH AMENDMENTS. The votes in WLA were as follows: 4 Aye(s): Senator(s) Lee, C., Chang, Lamosao, DeCorte; Aye(s) with reservations: none ; 0 No(es): none; and 1 Excused: Senator(s) Inouye.

    committee-passage-favorable

  30. 2026-03-19

    The committee(s) on EIG recommend(s) that the measure be PASSED, WITH AMENDMENTS. The votes in EIG were as follows: 5 Aye(s): Senator(s) Wakai, Chang, DeCoite, Richards, Fevella; Aye(s) with reservations: none ; 0 No(es): none; and 0 Excused: none.

    committee-passage-favorable

  31. 2026-03-16

    The committee(s) on EIG/WLA has scheduled a public hearing on 03-19-26 3:00PM; Conference Room 224 & Videoconference.

  32. 2026-03-12

    Received from House (Hse. Com. No. 273).

    introduction,receipt

  33. 2026-03-12

    Passed First Reading.

    reading-1

  34. 2026-03-12

    Referred to EIG/WLA, JDC.

    referral-committee

  35. 2026-03-10

    Passed Third Reading with Representative(s) Iwamoto voting aye with reservations; none voting no (0) and none excused (0). Transmitted to Senate.

    passage

  36. 2026-03-06

    Reported from JHA (Stand. Com. Rep. No. 1184-26), recommending passage on Third Reading.

  37. 2026-03-04

    The committee on JHA recommend that the measure be PASSED, UNAMENDED. The votes were as follows: 8 Ayes: Representative(s) Tarnas, Poepoe, Hashem, Kahaloa, Sayama, Takayama, Garcia, Shimizu; Ayes with reservations: none; Noes: none; and 2 Excused: Representative(s) Belatti, Cochran.

    committee-passage-favorable

  38. 2026-02-27

    Bill scheduled to be heard by JHA on Wednesday, 03-04-26 2:00PM in House conference room 325 VIA VIDEOCONFERENCE.

  39. 2026-02-11

    Reported from WAL (Stand. Com. Rep. No. 200-26) as amended in HD 1, recommending passage on Second Reading and referral to JHA.

  40. 2026-02-11

    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).

    reading-2,referral-committee

  41. 2026-02-03

    The committee on WAL recommend that the measure be PASSED, WITH AMENDMENTS. The votes were as follows: 9 Ayes: Representative(s) Hashem, Morikawa, Belatti, Ichiyama, Poepoe, Woodson, Souza; Ayes with reservations: Representative(s) Iwamoto, Shimizu; Noes: none; and Excused: none.

    committee-passage-favorable

  42. 2026-01-30

    Bill scheduled to be heard by WAL on Tuesday, 02-03-26 9:00AM in House conference room 411 VIA VIDEOCONFERENCE.

  43. 2026-01-26

    Referred to WAL, JHA, referral sheet 1

    referral-committee

  44. 2026-01-21

    Introduced and Pass First Reading.

    introduction,reading-1

  45. 2026-01-20

    Prefiled.

Versions

Documents

Votes

  • The committee on WAL recommend that the measure be PASSED, WITH AMENDMENTS.

    2026-02-03 · pass · 9-0

    Member-level votes (9)
    • Hashem: yes
    • Morikawa: yes
    • Belatti: yes
    • Ichiyama: yes
    • Poepoe: yes
    • Woodson: yes
    • Souza: yes
    • Iwamoto: yes
    • Shimizu: yes

  • The committee on JHA recommend that the measure be PASSED, UNAMENDED.

    2026-03-04 · pass · 8-0

    Member-level votes (10)
    • Tarnas: yes
    • Poepoe: yes
    • Hashem: yes
    • Kahaloa: yes
    • Sayama: yes
    • Takayama: yes
    • Garcia: yes
    • Shimizu: yes
    • Belatti: not voting
    • Cochran: not voting

  • The committee(s) on EIG recommend(s) that the measure be PASSED, WITH AMENDMENTS.

    2026-03-19 · pass · 5-0

    Member-level votes (5)
    • Wakai: yes
    • Chang: yes
    • DeCoite: yes
    • Richards: yes
    • Fevella: yes

  • The committee(s) on WLA recommend(s) that the measure be PASSED, WITH AMENDMENTS.

    2026-03-19 · pass · 4-0

    Member-level votes (6)
    • Lee: yes
    • C: yes
    • Chang: yes
    • Lamosao: yes
    • DeCorte: yes
    • Inouye: not voting

  • The committee(s) on JDC recommend(s) that the measure be PASSED, UNAMENDED.

    2026-04-07 · pass · 4-0

    Member-level votes (5)
    • Rhoads: yes
    • Gabbard: yes
    • Chang: yes
    • San Buenaventura: yes
    • Awa: not voting

  • Report adopted; Passed Third Reading.

    2026-04-14 · pass · 25-0

  • The Conference Committee recommends that the measure be Passed, with Amendments.

    2026-04-29 · pass · 3-0

    Member-level votes (3)
    • Hashem: yes
    • Tarnas: yes
    • Souza: yes

  • The Conference committee recommends that the measure be PASSED, WITH AMENDMENTS.

    2026-04-29 · pass · 3-0

    Member-level votes (5)
    • Wakai: yes
    • San Buenaventura: yes
    • Fevella: yes
    • Lee: not voting
    • C.: not voting

Related bills

No related bills recorded for this bill.

Official source

https://capitol.hawaii.gov/session/measure_indiv.aspx?billtype=HB&billnumber=1728&year=2026

Attribution

Data from openstates_bulk_csv, retrieved 2026-07-24T05:20:09.051962Z

Inspect retained evidence for changes recorded after evidence tracking began:

Source and document changesStatus and relationship changes

Session-wide evidence can include changes to other bills:

Bulk imports for this sessionSession dates and activity

Use this data

Every field on this page is available from the free public API — no key or licence required. Fetch this bill as JSON: GET /api/v1/bills?jurisdiction=HI&identifier=HB 1728. See the API docs or the MCP server for AI assistants.

Known limitations

  • Sponsor party and chamber affiliation are not yet captured by this API.
  • Committee referrals are not yet captured.

See the methodology page for data sources and limitations.