Hawaiʻi Gas issues RFPs for renewable hydrogen, renewable natural gas

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A first of its kind in Hawaiʻi, the Honouliuli Renewable Natural Gas Facility in Honolulu takes the gases that are a by-product of wastewater treatment and turns them into clean-burning biomethane. (Hawaiʻi Gas)

Hawaiʻi Gas, the state’s only regulated gas utility, has issued a request for proposals to purchase renewable natural gas and renewable hydrogen, key resources that will enable the company to shift away from its reliance on fossil fuel. 

The request for proposals is consistent with its clean energy plan and strategy detailed in Hawaiʻi Gas’s Integrated Resource Plan recently filed with the Hawaiʻi Public Utilities Commission. 

“Increasing our use of [renewable natural gas] and renewable hydrogen has been part of our strategic plan for a number of years,” said Alicia Moy, president and CEO of Hawaiʻi Gas. “When achieved, it will be a highly visible part of Hawaiʻi’s clean energy future.”

She said the company is “serious” about its commitment to carbon neutrality, and it intends to “lead the nation” in finding ways to integrate more renewable energy sources into its pipeline.


“We already have a 50-year head start on mainland gas companies in our use of hydrogen in utility gas distribution,” she said. “While our business represents less than 1% of the state’s greenhouse gas emissions, we are committed to reducing our carbon footprint.”

Hawaiʻi Gas already leads the nation in blending both renewable natural gas and hydrogen into its utility gas supply on Oʻahu. Additional sources of these renewable and clean fuels will enable the company to further diversify its fuel supply and reduce its overall carbon footprint in line with the state’s climate goals, the company said in a press release. 

“We prefer to make this change using local sources, and hope potential suppliers interpret our request for proposals as a signifier of a growing demand for renewable gas,” Moy said.

Hawaiʻi Gas has been utilizing renewable natural gas produced at the City and County of Honolulu’s award-winning Honouliuli Wastewater renewable natural gas facility since 2018.


Hawaiʻi Gas also leads the nation in blending up to 15% hydrogen into its gas mix and has been doing so since 1974. This long history of using both renewable natural gas and hydrogen puts Hawaiʻi Gas ahead of other gas utilities in terms of diversifying its gas fuel supply and allows Hawaiʻi to be at the forefront of using renewable natural gas and hydrogen in its gas pipelines. 

Renewable natural gas can be produced using sources such as wastewater treatment plants, landfills, construction and demolition waste, bio-crops, food waste and dairy farms.

Renewable hydrogen can be produced using renewable electricity for electrolysis and steam methane reforming of renewable natural gas. Hawaiʻi Gas will consider proposals for one or multiple forms of renewable natural gas and renewable hydrogen, or a blend of the two. 

Hawaiʻi Gas is seeking proposals from local and national suppliers who can provide up to 65,000 therms of renewable natural gas or up to 2,300 kg per day of renewable hydrogen.


This request is the equivalent of replacing nearly all of the utility’s synthetic natural gas with renewable natural gas. As research and innovation continue, Hawaiʻi Gas will work to increase its use of renewable hydrogen, which does not produce any carbon emissions. Key determinants of the shift to renewable hydrogen will be safety and affordability for customers.

The company plans to enter into one or more fuel supply agreements for renewable natural gas and renewable hydrogen contingent upon approval from the Hawai‘i Public Utilities Commission. Interested bidders can obtain the request for proposals on our website at or by emailing: [email protected].

Proposals are due Sept. 30, 2023 at 2 p.m.

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