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State Government / Hawaii / Legislation / HB 1728

HB 1728Session 2026HouseBecame law

RELATING TO RAINWATER CATCHMENT SYSTEMS.

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)

Latest development · Jul 9, 2026

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

Your view
Source record ↗
Session
2026
Introduced
Jan 20, 2026
Latest passage
May 6, 2026
TopicsSponsorsActionsDiscussion

Topics and classification

Source subjects

CountiesRainwater Catchment Systems

Document type

Bill

Sponsors

Primary sponsors are listed before cosponsors and other sponsoring entities.

Primary sponsorAMATO
Primary sponsorBELATTI
Primary sponsorEVSLIN
Primary sponsorGARRETT
Primary sponsorGRANDINETTI
Primary sponsorILAGAN
Primary sponsorKEOHOKAPU-LEE LOY
Primary sponsorKILA
Primary sponsorKUSCH
Primary sponsorMARTEN
Primary sponsorMIYAKE
Primary sponsorMORIKAWA
Primary sponsorPERRUSO
Primary sponsorPOEPOE
Primary sponsorREYES ODA
Primary sponsorSHIMIZU
Primary sponsorSOUZA
Primary sponsorTAKAYAMA
Primary sponsorTARNAS
cosponsorMatayoshi

Action timeline

Newest action first. Action language is supplied by the state source.

View full action timeline45 actions⌄
  1. Jul 9, 2026

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

    Became LawSenate
  2. Jul 9, 2026

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

    Became LawHouse
  3. May 8, 2026

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

    ReceiptSenate
  4. May 7, 2026

    Transmitted to Governor.

    House
  5. May 6, 2026

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

    PassageSenate
  6. May 6, 2026

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

    PassageHouse
  7. May 6, 2026

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

    ReceiptHouse
  8. Apr 29, 2026

    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 FavorableSenate
  9. Apr 29, 2026

    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 FavorableHouse
  10. Apr 29, 2026

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

    House
  11. Apr 29, 2026

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

    House
  12. Apr 29, 2026

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

    Senate
  13. Apr 29, 2026

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

    Senate
  14. Apr 27, 2026

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

    Senate
  15. Apr 20, 2026

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

    House
  16. Apr 20, 2026

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

    ReceiptSenate
  17. Apr 20, 2026

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

    Senate
  18. Apr 20, 2026

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

    ReceiptHouse
  19. Apr 17, 2026

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

    ReceiptSenate
  20. Apr 16, 2026

    House disagrees with Senate amendment (s).

    Amendment FailureHouse
  21. Apr 14, 2026

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

    PassageSenate
  22. Apr 14, 2026

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

    House
  23. Apr 10, 2026

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

    Senate
  24. Apr 10, 2026

    One Day Notice 04-14-26.

    Senate
  25. Apr 7, 2026

    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 FavorableSenate
  26. Apr 1, 2026

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

    Senate
  27. Mar 30, 2026

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

    Senate
  28. Mar 30, 2026

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

    PassageReading 2Referral CommitteeSenate
  29. Mar 19, 2026

    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 FavorableSenate
  30. Mar 19, 2026

    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 FavorableSenate
  31. Mar 16, 2026

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

    Senate
  32. Mar 12, 2026

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

    IntroductionReceiptSenate
  33. Mar 12, 2026

    Passed First Reading.

    Reading 1Senate
  34. Mar 12, 2026

    Referred to EIG/WLA, JDC.

    Referral CommitteeSenate
  35. Mar 10, 2026

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

    PassageHouse
  36. Mar 6, 2026

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

    House
  37. Mar 4, 2026

    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 FavorableHouse
  38. Feb 27, 2026

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

    House
  39. Feb 11, 2026

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

    House
  40. Feb 11, 2026

    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 2Referral CommitteeHouse
  41. Feb 3, 2026

    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 FavorableHouse
  42. Jan 30, 2026

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

    House
  43. Jan 26, 2026

    Referred to WAL, JHA, referral sheet 1

    Referral CommitteeHouse
  44. Jan 21, 2026

    Introduced and Pass First Reading.

    IntroductionReading 1House
  45. Jan 20, 2026

    Prefiled.

    House

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State legislative data provided by Open States and linked legislature sources when available.

Civixly tracks state bill actions, passage dates, and sponsors. Member-level state roll-call histories are not included.

Source data last updated Jul 15, 2026.