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Aqua Engineers, Inc.

Hawai‘i’s Largest and Most Experienced Water and Wastewater Management Company

Aqua Engineers, Inc. got its start when Ian Kagimoto, Walter Briant, Seichi Oyama, and Frank Kiger saw a need for trained operators for the privately-owned wastewater treatment plants on Kaua‘i.  They formally opened for business on January 1, 1981, providing operation and maintenance services for the Poipu Kai wastewater treatment plant. 

The number of clients soon increased, as well as the need to provide design and engineering services.  After Hurricane Iniki hit Kaua‘i in 1992 and the island’s economy slowed, Aqua expanded and got its first off-island contracts—Lana‘i Company at Manele Bay, the Keauhou Resort sewage treatment plant on the Big Island, and additional plants on Maui and O‘ahu.

Now Lawa‘i based Aqua Engineers is owned by its nearly 100 employees and is Hawai‘i’s largest and most experienced water and wastewater management company, with a wholly owned subsidiary, Briant Construction.  Aqua operates and maintains 28 wastewater systems, more than 70 pumping stations, 13 water systems, and five R-1 Re-use facilities that produce the highest quality effluent in Hawai‘i. 

“We are committed to providing clients with innovative, sustainable solutions for water and wastewater systems that support health and safety and improve the environment,” says President and Founder Kagimoto. 

With contracts to operate and manage the Army’s wastewater systems of O‘ahu, Aqua also is one of the state’s largest defense contractors.   In 2008, Aqua was awarded a $229 million, 50-year military contract for the privatization of the U.S. Army Wastewater Collection Systems on O‘ahu, making the company Hawai‘i’s largest private utility provider.  Aqua Engineers has been honored with multiple “sustainability awards” and has received project recognition for its partnership with the U.S. Military and for its role in taking operational measures to improve the environment.

Aqua’s commitment to the environment and community goes beyond wastewater management.  Aqua employees volunteer regularly and work with schools to educate students about water preservation and quality. 

“We are partnering with industry and community to promote potable water preservation and to create alternative and sustainable energy solutions through biosolids,” says Senior Vice President Hugh Strom.  “We will continue to design and operate efficient water and wastewater systems using the latest technology to meet community needs.”  

Phone: (808) 332-7381 • Toll Free: (800) 430-7381 • Fax: (808) 332-7596
3560 Koloa Road Kalaheo, HI 96741




Hawaii Business magazine invites you to comment on our articles and the issues they raise. Comments are moderated for offensive language, commercial messages and off-topic posts and may be deleted. Some comments may be chosen for inclusion in the magazine on the Feedback page.

Jan 30, 2013 11:54 am
 Posted by  Watts Constructors Schofield

I am looking for a the most resent Collection System Design and Construction Protocol Manual.

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