HONOLULU, July 28, 2025 — The Hawaii Public Utilities Commission (HPUC) has approved new wastewater rates for Hawaii American Water’s Hawaii Kai, Mauna Lani, and Waimea service areas.
The company’s rate request was filed on August 5, 2024, and was primarily driven by over $40 million in local infrastructure upgrades in all three districts. The new rates reinforce the company’s commitment to replace aging infrastructure, provide safe and reliable service, comply with environmental regulations and support infrastructure improvements for treatment plants, collection systems and pump stations.
“We are committed to making necessary infrastructure investments that allow us to continue providing safe and reliable wastewater services, while also enhancing the systems for long-term sustainability, resiliency and environmental protection,” said Lee Mansfield, Senior Manager Operations, Hawaii American Water. “Our approach to consistent and efficient investment balanced with managing costs helps us deliver reliable and affordable service to our customers.”
New rates are expected to be effective in early August 2025. The typical single-family customer in Hawaii Kai will see a monthly rate increase of approximately $4. For our Big Island operations at Mauna Lani and Waimea the typical single-family customer will see a rate increase of approximately $18 to $25 per month. The last rate adjustments were September 2003 for Mauna Lani operations and January 2011 for Waimea operations. The company last filed a rate case for the Hawaii Kai system in 2021.
Customers will receive information about the new rates on their Hawaii American Water bill. Information will also be available on the company’s website under Customer Service Billing, Your Wastewater Rates.