Hawaii American Water Granted New Rates by Hawaii Public Utilities Commission

Increase Driven by Over $40 Million in Infrastructure Investments

News Release from Hawaii American Water

HONOLULU, HI (July 26, 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.

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About American Water

American Water (NYSE: AWK) is the largest regulated water and wastewater utility company in the United States. With a history dating back to 1886, We Keep Life Flowing® by providing safe, clean, reliable and affordable drinking water and wastewater services to more than 14 million people with regulated operations in 14 states and on 18 military installations. American Water’s 6,700 talented professionals leverage their significant expertise and the company’s national size and scale to achieve excellent outcomes for the benefit of customers, employees, investors and other stakeholders.

For more information, visit amwater.com and join American Water on LinkedIn, Facebook, X and Instagram. 

About Hawaii American Water

Hawaii American Water, a subsidiary of American Water, provides high-quality wastewater services to approximately 30,000 people.