# Hawaii HB 510: RELATING TO DECLARATION OF WATER SHORTAGE AND EMERGENCY.

Hawaii HB 510, RELATING TO DECLARATION OF WATER SHORTAGE AND EMERGENCY., is a 2025–2026 Regular Session (Year 1) House bill sponsored by Linda Ichiyama (Democratic); status passed senate, last action 2025-04-15 (Received notice of appointment of House conferees (Hse. Com. No. 732).) (as of 2026-10-28).

- Canonical: https://policyrisk.com/state-bill/HI-HB510-2025
- As of: 2026-10-28
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Bill: Hawaii HB 510
- State: Hawaii
- Session: 2025–2026 Regular Session (Year 1)
- Title: RELATING TO DECLARATION OF WATER SHORTAGE AND EMERGENCY.
- Status: passed senate
- Chamber: House
- Introduced: 2025-01-17
- Last action: 2025-04-15, Received notice of appointment of House conferees (Hse. Com. No. 732).
- Sponsor: Linda Ichiyama (Democratic)
- Cosponsors: 2
- Subjects: CWRM, Water Shortage and Emergency, Water Shortage Declaration, Notice, WTL, JDC
- Touches household money: no
- Economic provisions PRIA read: 0

## Summary

Amends the conditions, manner, and areas in which the Commission on Water Resource Management can declare and provide notice of water shortages and emergencies. Limits the duration of a water shortage declaration to ninety days. Limits water usage restrictions imposed on a permittee or owner and operator to twenty per cent of the permittee's or owner and operator's last reported monthly use. Requires CWRM to maintain a list of names and postal or email addresses of persons who request notification of a water shortage declaration and send them a copy of a notice of a water shortage declaration whenever water shortage is declared. Effective 7/1/2040. (SD2)

## Bill overview

No economic impacts identified for this bill.

## Sponsors and cosponsors

- Sponsor: Linda Ichiyama (Democratic), House
- Cosponsor: Mark J. Hashem (Democratic), House
- Cosponsor: David A. Tarnas (Democratic), House

## Actions (29)

- 2025-04-15: Received notice of appointment of House conferees (Hse. Com. No. 732). (Senate)
- 2025-04-14: House Conferees Appointed: Hashem, Tarnas Co-Chairs; Ichiyama, Lamosao, Shimizu. (House)
- 2025-04-11: Received notice of disagreement (Hse. Com. No. 704). (Senate)
- 2025-04-10: House disagrees with Senate amendment (s). (House)
- 2025-04-08: Report Adopted; Passed Third Reading, as amended (SD 2). Ayes, 23; Aye(s) with reservations: none. Noes, 2 (Senator(s) Awa, DeCorte). Excused, 0 (none). Transmitted to House. (Senate)
- 2025-04-08: Returned from Senate (Sen. Com. No. 651) in amended form (SD 2). (House)
- 2025-04-04: Reported from JDC (Stand. Com. Rep. No. 1718) with recommendation of passage on Third Reading, as amended (SD 2). (Senate)
- 2025-04-04: 48 Hrs. Notice 04-08-25. (Senate)
- 2025-03-27: The committee(s) on JDC recommend(s) that the measure be PASSED, WITH AMENDMENTS. The votes in JDC were as follows: 4 Aye(s): Senator(s) Rhoads, Gabbard, Chang, Awa; Aye(s) with reservations: none ; 0 No(es): none; and 1 Excused: Senator(s) San Buenaventura. (Senate)
- 2025-03-25: The committee(s) on JDC will hold a public decision making on 03-27-25 10:40AM; Conference Room 016 & Videoconference. (Senate)
- 2025-03-21: Reported from WTL (Stand. Com. Rep. No. 1214) with recommendation of passage on Second Reading, as amended (SD 1) and referral to JDC. (Senate)
- 2025-03-21: Report adopted; Passed Second Reading, as amended (SD 1) and referred to JDC. (Senate)
- 2025-03-21: The committee(s) on JDC will hold a public decision making on 03-25-25 10:01AM; Conference Room 016 & Videoconference. (Senate)
- 2025-03-14: The committee(s) on WTL recommend(s) that the measure be PASSED, WITH AMENDMENTS. The votes in WTL were as follows: 4 Aye(s): Senator(s) Inouye, Elefante, Chang, DeCorte; Aye(s) with reservations: none ; 0 No(es): none; and 1 Excused: Senator(s) McKelvey. (Senate)
- 2025-03-10: The committee(s) on WTL has scheduled a public hearing on 03-14-25 1:00PM; Conference Room 229 & Videoconference. (Senate)
- 2025-03-06: Received from House (Hse. Com. No. 250). (Senate)
- 2025-03-06: Passed First Reading. (Senate)
- 2025-03-06: Referred to WTL, JDC. (Senate)
- 2025-03-04: Passed Third Reading with Representative(s) Shimizu voting aye with reservations; Representative(s) Alcos, Garcia, Kong, Muraoka voting no (4) and Representative(s) Pierick, Ward excused (2). Transmitted to Senate. (House)
- 2025-02-28: Reported from JHA (Stand. Com. Rep. No. 1085), recommending passage on Third Reading. (House)
- 2025-02-27: The committee on JHA recommend that the measure be PASSED, UNAMENDED. The votes were as follows: 9 Ayes: Representative(s) Tarnas, Poepoe, Belatti, Hashem, Kahaloa, Perruso, Takayama, Todd; Ayes with reservations: Representative(s) Shimizu; 1 Noes: Representative(s) Garcia; and 1 Excused: Representative(s) Cochran. (House)
- 2025-02-25: Bill scheduled to be heard by JHA on Thursday, 02-27-25 2:00PM in House conference room 325 VIA VIDEOCONFERENCE. (House)
- 2025-02-11: Reported from WAL (Stand. Com. Rep. No. 362) as amended in HD 1, recommending passage on Second Reading and referral to JHA. (House)
- 2025-02-11: Passed Second Reading as amended in HD 1 and referred to the committee(s) on JHA with Representative(s) Garcia voting aye with reservations; none voting no (0) and Representative(s) Cochran, Ward excused (2). (House)
- 2025-02-06: The committee on WAL recommend that the measure be PASSED, WITH AMENDMENTS. The votes were as follows: 9 Ayes: Representative(s) Hashem, Lamosao, Belatti, Iwamoto, Poepoe, Woodson, Souza; Ayes with reservations: Representative(s) Morikawa, Shimizu; Noes: none; and 1 Excused: Representative(s) Ichiyama. (House)
- 2025-02-04: Bill scheduled to be heard by WAL on Thursday, 02-06-25 9:00AM in House conference room 411 VIA VIDEOCONFERENCE. (House)
- 2025-01-21: Introduced and Pass First Reading. (House)
- 2025-01-21: Referred to WAL, JHA, referral sheet 2 (House)
- 2025-01-17: Pending introduction. (House)

## Bill text

- Bill Text: [PDF](https://data.capitol.hawaii.gov/sessions/session2025/bills/HB510_SD2_.pdf)
- HB510_HD1: [HTML](https://data.capitol.hawaii.gov/sessions/session2025/bills/HB510_HD1_.HTM)
- HB510_SD1: [HTML](https://data.capitol.hawaii.gov/sessions/session2025/bills/HB510_SD1_.HTM)
- HB510_SD2: [HTML](https://data.capitol.hawaii.gov/sessions/session2025/bills/HB510_SD2_.HTM)
- Original: [HTML](https://data.capitol.hawaii.gov/sessions/session2025/bills/HB510_.HTM), [PDF](https://data.capitol.hawaii.gov/sessions/session2025/bills/HB510_.PDF)

## Related bills

- SB 572: RELATING TO HOUSING. (signed)
- HB 431: RELATING TO HOUSING. (signed)
- HB 420: RELATING TO REMEDIES. (signed)
- SB 1296: RELATING TO DISASTER RECOVERY. (signed)
- HB 830: RELATING TO HISTORIC PRESERVATION REVIEWS. (signed)
- HB 1064: RELATING TO FIRE PROTECTION. (signed)

## Sources
- [Bill Text (PDF)](https://data.capitol.hawaii.gov/sessions/session2025/bills/HB510_SD2_.pdf)
- [HB510_HD1 (HTML)](https://data.capitol.hawaii.gov/sessions/session2025/bills/HB510_HD1_.HTM)
- [HB510_SD1 (HTML)](https://data.capitol.hawaii.gov/sessions/session2025/bills/HB510_SD1_.HTM)
- [HB510_SD2 (HTML)](https://data.capitol.hawaii.gov/sessions/session2025/bills/HB510_SD2_.HTM)
- [Original (HTML)](https://data.capitol.hawaii.gov/sessions/session2025/bills/HB510_.HTM)
- [Original (PDF)](https://data.capitol.hawaii.gov/sessions/session2025/bills/HB510_.PDF)

## Related
- [SB 572: RELATING TO HOUSING.](https://policyrisk.com/state-bill/HI-SB572-2025)
- [HB 431: RELATING TO HOUSING.](https://policyrisk.com/state-bill/HI-HB431-2025)
- [HB 420: RELATING TO REMEDIES.](https://policyrisk.com/state-bill/HI-HB420-2025)
- [SB 1296: RELATING TO DISASTER RECOVERY.](https://policyrisk.com/state-bill/HI-SB1296-2025)
- [HB 830: RELATING TO HISTORIC PRESERVATION REVIEWS.](https://policyrisk.com/state-bill/HI-HB830-2025)
- [HB 1064: RELATING TO FIRE PROTECTION.](https://policyrisk.com/state-bill/HI-HB1064-2025)
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Source: PRIA, https://policyrisk.com/state-bill/HI-HB510-2025 (as of 2026-10-28).