Hawaii Water Service Company (Hawaii Water) was formed in 2003 with the acquisition of Ka'anapali Water Corporation. Hawaii Water's Ka'anapali District serves 700 customers on Maui, including several large resorts and condominium complexes.
In 2008, Hawaii Water acquired the Pukalani Sewerage Treatment Works, a wastewater system serving 800 customers in Pukalani, located approximately 30 miles from the Ka'anapali District on Maui. And in 2008, Hawaii Water purchased the Waikoloa Water Company, Waikoloa Sanitary Sewer Company, and Waikoloa Resort Utilities, which provide water and wastewater services to homes, condominiums, hotels, golf courses, and shops at Waikoloa Beach Resort and in Waikoloa Village, both on the Big Island of Hawaii. Also, in December 2008, Hawaii Water formed Kona Water Service Company on the Big Island to provide water and wastewater services to residences and businesses on the Kukio Resort.
Today, Hawaii Water serves 3,770 regulated accounts on Maui and Hawaii, many of which are large users.