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Water Systems

The Board of Water is responsible for nine independent water systems from Kekaha to Haena. The water systems are made up of deep well pumps, tunnels, booster pumps, storage tanks, and transmission and distribution pipelines. Water is produced, treated, and stored in tanks for distribution to our customers.

Water System Map
County of Kauaʻi, Department of Water, System Boundaries

Water System Sources

All water originates from groundwater sources beneath the Earth’s surface. Rainfall in the mountains seeps through the ground, filtering into natural underground reservoirs known as aquifers. Wells are drilled into these aquifers to extract the water. In some cases, these underground sources are accessed through tunnels. Groundwater is typically of high quality and requires minimal treatment, usually just disinfection, unlike surface water which needs both filtration and more extensive disinfection. The lone surface water source is a reservoir where water is pumped into a micro-filtration plant to remove suspended materials and microorganisms. The water is then disinfected prior to distribution.

Water Sources

The water supply for the Anahola water system comes from the following sources:

  • Anahola Well A (90-A)
  • Anahola Well B
  • Anahola Well C

Water Storage Tanks

All of the water is chlorinated and pumped into the distribution system or stored in the following tanks:

Anahola
  • 150,000 gallon tank
  • 500,000 gallon tank

Water Sources

The water supply for the ʻAnini water system comes from the following sources:

Princeville Utilities Company, Inc.
  • Princeville Well No. 1
  • Princeville Well No. 2
  • Princeville Well No. 4

Water Storage Tanks

All of the water is chlorinated and pumped into the distribution system or stored in the following tanks:

Princeville Utilities Company, Inc.
  • Princeville
  • 500,000 gallon tank
  • 50,000 gallon tank

Water Sources

The water supply for the Hāʻena & Wainiha water system comes from the following sources:

  • Hāʻena Well A
  • Wainiha Well No. 1
  • Wainiha Well No. 2

Water Storage Tanks

All of the water is chlorinated and pumped into the distribution system or stored in the following tanks:

  • Hāʻena-Wainiha
  • 100,000 gallon tank
  • Wainiha
  • 6,500 gallon tank

Water Sources

The water supply for the Hanalei water system comes from the following sources:

  • Maka Ridge Well (No. 73)
  • Princeville (in emergencies)

Water Storage Tanks

All of the water is chlorinated and pumped into the distribution system or stored in the following tanks:

  • Maka Ridge
  • 250,000 gallon tank

Water Sources

The water supply for the Hanapēpē and ʻEleʻele water system comes from the following sources:

  • Hanapēpē Valley Well A
  • Hanapēpē Valley Well B
  • Hanapēpē Well No. 4
  • Nagoshi Well (Out of service in 2006)

Water Storage Tanks

All of the water is chlorinated and pumped into the distribution system or stored in the following tanks:

  • Hanapēpē
  • 500,000 gallon tank
  • Hanapēpē Cliffside
  • 500,000 gallon tank
  • ʻEleʻele
  • Two 400,000 gallon tanks
  • ʻEleʻele Nani
  • 200,000 gallon tank

Water Sources

The water supply for the Kalāheo water system is part of the Kalaheo-Koloa water system and comes from the following sources:

Kalāheo Area
  • Kalāheo Deepwell A
  • Kalāheo Deepwell B
Lāwaʻi-Oma’o Area
  • Lāwaʻi Well No. 1
  • Lāwaʻi Well No. 2
  • Piwai Wells No. 2 & 3

Water Storage Tanks

All of the water is chlorinated and pumped into the distribution system or stored in the following tanks:

Kalāheo Area
  • Kalāheo Nursery
  • 100,000 gallon tank
  • Kalāheo Clear Well Storage Tank
  • 300,000 gallon tank
  • Kalāheo 908 Tank
  • 500,000 gallon tank
  • Kukuiolono #1
  • 250,000 gallon tank
  • Kakela Maikai
  • 200,000 gallon tank
Lāwaʻi-Oma’o Area
  • Andrade Tank
  • 30,000 gallon tank
  • Lāwaʻi
  • 250,000 gallon tank
  • Piwai
  • 100,000 gallon tank
  • 500,000 gallon tank 

Water Sources

The water supply for the Kekaha-Waimea water system comes from the following sources:

  • Kekaha, Waipao Valley Well
  • Kekaha, Paua Valley Well
  • Kekaha Shaft 12
  • Kapilimao Well
  • Waimea Well A
  • Waimea Well B

Water Storage Tanks

All of the water is chlorinated and pumped into the distribution system or stored in the following tanks:

  • Kekaha
  • Two 500,000 gallon tanks
  • Waimea Heights
  • 100,000 gallon tank
  • Waimea
  • 500,000 gallon tank
  • 250,000 gallon tank

Water Sources

The water supply for the Kīlauea water system comes from the following sources:

  • Kīlauea Well No. 1
  • Kīlauea Well No. 2

Water Storage Tanks

All of the water is chlorinated and pumped into the distribution system or stored in the following tanks:

  • Kīlauea
  • Two 250,000 gallon tanks
  • Kalihiwai
  • 100,000 gallon tank
  • Waipake
  • 100,000 gallon tank
  • Namahana Farms
  • 100,000 gallon tank
  • Pu’u Pane
  • 100,000 gallon tank

Water Sources

The water supply for the Kōloa-Poʻipū water system comes from the following sources:

Lāwaʻi-Oma’o Area
  • Lāwaʻi Well No. 1
  • Lāwaʻi Well No. 2
  • Piwai Wells No. 2 & 3
Kōloa-Po’ipu Area
  • Kōloa Wells 16-A & 16-B
  • Kōloa Wells C, D, E & F

Water Storage Tanks

All of the water is chlorinated and pumped into the distribution system or stored in the following tanks:

Lāwaʻi-Oma’o Area
  • Lāwaʻi
  • 250,000 gallon tank
  • Piwai
  • 100,000 gallon tank
  • 500,000 gallon tank 
Kōloa-Po’ipu Area
  • Kōloa
  • 1,000,000 gallon tank
  • Kōloa (Manuhonuhonu Tanks)
  • 250,000 gallon tank
  • 1,500,000 gallon tank
  • Po’ipu
  • Two 1,500,000 gallon tanks
  • Pa’anau
  • 250,000 gallon tank
  • 500,000 gallon tank
  • Oma’o Tank
  • 500,000 gallon tank

Water Sources

The water supply for the Lāwaʻi-ʻŌmaʻo water system is part of the Kalaheo-Koloa water system and comes from the following sources:

Kalāheo Area
  • Kalāheo Deepwell A
  • Kalāheo Deepwell B
Lāwaʻi-Oma’o Area
  • Lāwaʻi Well No. 1
  • Lāwaʻi Well No. 2
  • Piwai Wells No. 2 & 3
Kōloa-Po’ipu Area
  • Kōloa Wells 16-A & 16-B
  • Kōloa Well E

Water Storage Tanks

All of the water is chlorinated and pumped into the distribution system or stored in the following tanks:

Kalāheo Area
  • Kalāheo 908 Tank
  • 500,000 gallon tank
  • Kukuiolono #1
  • 250,000 gallon tank
Lāwaʻi-Oma’o Area
  • Andrade Tank
  • 30,000 gallon tank
  • Lāwaʻi
  • 250,000 gallon tank
  • Piwai
  • 100,000 gallon tank
  • 500,000 gallon tank 
Kōloa-Po’ipu Area
  • Kōloa
  • 1,000,000 gallon tank
  • Kōloa (Manuhonuhonu Tanks)
  • 250,000 gallon tank
  • 1,500,000 gallon tank
  • Oma’o Tank
  • 500,000 gallon tank

Water Sources

The water supply for the Līhuʻe-Hanamāʻulu water system is part of the Līhuʻe-Kapaʻa water system and comes from the following sources:

Puhi Area
  • Puhi Well No. 1
Līhuʻe-Hanamāʻulu Area
  • Kālepa Ridge Well
  • Garlinghouse Tunnel
  • Kilohana Well A, B, and I
  • Līhuʻe Grammar School Well
  • Hanamāʻulu Well No. 3 & 4
  • Pukaki Well
  • Grove Farm Surface Water Treatment Plant

Water Storage Tanks

All of the water is chlorinated and pumped into the distribution system or stored in the following tanks:

Līhuʻe-Hanamāʻulu Area
  • Līhuʻe
  • Two 1,000,000 gallon tanks
  • Kālepa
  • 500,000 and 1,000,000 gallon tanks
  • Nāwiliwili
  • 1,000,000 gallon tank
  • Hanamāʻulu 510 Tank
  • 100,000 gallon tank
  • Kauaʻi Inn
  • 250,000 gallon tank
  • Puhi 393
  • 1,000,000 gallon tank

Water Sources

The water supply for the Puhi water system is part of the Līhuʻe-Kapaʻa water system and comes from the following sources:

Puhi Area
  • Puhi Wells No. 3 and 4
  • Puhi Wells No. 5A and 5B
Līhuʻe-Hanamāʻulu Area
  • Kālepa Ridge Well
  • Garlinghouse Tunnel
  • Kilohana Well A, B, and I
  • Līhuʻe Grammar School Well
  • Hanamāʻulu Well No. 3 & 4
  • Pukaki Well
  • Grove Farm Surface Water Treatment Plant

Water Storage Tanks

All of the water is chlorinated and pumped into the distribution system or stored in the following tanks:

Puhi Area
  • Puhi 510
  • 500,000 gallon tank
  • 1,000,000 gallon tank
Līhuʻe-Hanamāʻulu Area
  • Līhuʻe
  • Two 1,000,000 gallon tanks
  • Nāwiliwili
  • 1,000,000 gallon tank
  • Hanamāʻulu 510 Tank
  • 100,000 gallon tank
  • Puhi 393
  • 1,000,000 gallon tank

Water Sources

The water supply for the Wailua-Kapaʻa water system is part of the Līhuʻe-Kapaʻa water system and comes from the following sources:

Līhuʻe-Hanamāʻulu Area
  • Kālepa Ridge Well
  • Garlinghouse Tunnel
  • Kilohana Well A, B, and I
  • Līhuʻe Grammar School Well
  • Hanamāʻulu Well No. 3 & 4
  • Pukaki Well
  • Grove Farm Surface Water Treatment Plant
Wailua-Kapaʻa Area
  • Makaleha Tunnel
  • Moalepe Tunnel
  • Kapaʻa Homesteads Wells No. 1, 2, and 3
  • Wailua Homesteads Well A and Well B
  • Nonou Well B and Well C

Water Storage Tanks

All of the water is chlorinated and pumped into the distribution system or stored in the following tanks:

Līhuʻe-Hanamāʻulu Area
  • Līhuʻe
  • Two 1,000,000 gallon tanks
  • Kālepa
  • 500,000 and 1,000,000 gallon tanks
  • Hanamāʻulu 510 Tank
  • 100,000 gallon tank
  • Puhi 393
  • 1,000,000 gallon tank
Wailua-Kapaʻa Area
  • Nonou
  • 2,000,000 gallon tank
  • Makaleha
  • 500,000 gallon tank
  • 1,000,000 gallon tank
  • Ornellas
  • 200,000 gallon tank
  • Wailua Homesteads
  • 500,000 gallon tank
  • Puʻupilo
  • 125,000 gallon tank
  • Stable Tank
  • 1,000,000 gallon tank

Water Quality Reports

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