The Agricultural Resource Management Division manages state irrigation systems at Hoolehua, Kahuku, Waimanalo, Waimea and Honokaa-Paauilo.
Irrigation Systems are the lifeline for any agricultural operation. The Hawaii Department of Agriculture, through its Agricultural Resource Management Division (ARMD) manages five irrigation systems, two on Oahu, two on the island of Hawaii, and one on Molokai.
The ARMD also manages the following reservoirs:
- Honokaia Reservoir located in Honokaia, Island of Hawaii
- Paauilo Reservoir located in Paauilo, Island of Hawaii
- Puu Pulehu Reservoir located in Waimea, Island of Hawaii
- Waimea 60 MG Reservoir located in Waimea, Island of Hawaii
- Kualapuu Reservoir located in Kualapuu, Island of Molokai
- Waimanalo 60 MG Reservoir located in Waimanalo, Island of Oahu
All recreational activities, including swimming and fishing, in the above-listed reservoirs are prohibited. These reservoirs are not open to the public. Trespassers will be prosecuted in accordance with §708-814, Hawaii Revised Statutes.
Waimanalo Irrigation System
To view the current water level of the Waimanalo Irrigation System, click here.
- length: 15 miles
- acres served: 1,174 acres
- transports: 150.0 million gallons per year
Kahuku Irrigation System
- length: 3 miles
- acres served: 445 acres
Waimea Irrigation System
To view the current water level of the Waimea Irrigation System, click here.
- length: 15 miles
- acres served: 566 acres
- transports: 307.2 million gallons per year
Lower Hamakua Irrigation System (Honokaa-Paauilo)
To view the current water levels of the Lower Hamakua Irrigation System, click here.
- length: 26 miles
- acres served: 4,755 acres
Molokai Irrigation System
To view the current level of the Molokai Irrigation System, click here.
- length: 25 miles
- acres served: 3,160 acres
- transports: 1.2 billion gallons per year
To view more information on the administration of the Molokai Irrigation System, click here.
To Apply for Irrigation Services
or obtained by writing or calling the Agricultural Resource Management Division below.
Changing an Acreage Assessment
For information on the procedure to request to change an acreage assessment, click here.
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Hawaii Department of Agriculture
Agricultural Resource Management Division
1428 South King Street
Honolulu, HI 96814-2512
Phone: (808) 973-9473
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