The Honolulu Board of Water Supply (BWS) has filed a federal lawsuit against the U.S. Navy, seeking $1.2 billion in damages for what it describes as ongoing costs to clean up and prevent further contamination from the 2021 fuel spill at Red Hill.

The lawsuit marks a significant escalation in a long-running dispute over the Navy’s handling of aging fuel storage tanks that sit above Oʻahu’s primary drinking water aquifer.

The legal action comes after what BWS Chair Nāʻālehu Anthony described as “months of futile negotiations” with the Navy.

“The Navy left the Board of Water Supply no choice but to seek those damages in court,” Anthony said in a public statement.

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The spill in question occurred in November 2021, when jet fuel from the Red Hill Bulk Fuel Storage Facility—home to 20 massive underground tanks built during World War II—leaked into the Navy’s own water system, which serves over 90,000 military personnel and their families.

Thousands became ill in the days that followed, prompting widespread concern and action from local water authorities to protect the broader public water supply.

The Board of Water Supply quickly moved to isolate the contamination, including shutting down three major sources: the Hālawa Shaft and the ʻAiea and Hālawa wells.

Together, those wells provided approximately 25% of Oʻahu’s drinking water supply.

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The impact was immediate and far-reaching, as residents across the island faced increased water restrictions and long-term uncertainty about the safety of their groundwater.

While the contamination primarily affected the military’s distribution system, both that system and the municipal one draw from the same aquifer, raising concerns about the potential spread of hazardous chemicals across the island’s sole-source water supply.

This fear has been compounded by decades of prior incidents at the Red Hill facility.

According to a separate lawsuit filed by military families earlier this year, the Red Hill site has experienced at least 76 fuel-related incidents since the late 1940s, with estimates that more than a million gallons of fuel may have seeped into the ground.

Many of those families have expressed frustration with what they see as inadequate compensation and accountability from the Navy.

Ernie Lau, Board of Water Supply Manager and Chief Engineer, has been a vocal advocate for addressing the risks posed by the Red Hill facility.

He spent years publicly urging the Navy to reinforce and modernize the underground tanks.

Despite those warnings, little progress was made until the 2021 crisis brought the issue to national attention.

In a statement released Tuesday, Lau reiterated the gravity of the situation and the long-term nature of the cleanup and protection efforts. “This is not an issue that will be solved quickly or cheaply,” he said.

“Every action must be taken to protect the purity of Oʻahu’s water, and it is only right that the Navy assume financial responsibility for its actions.”

Lau has also criticized the Navy for a lack of transparency in the aftermath of the spill. He cited heavily redacted water testing reports and limited disclosure of critical information as ongoing barriers to trust and collaboration.

The lack of detailed communication has further fueled public skepticism and added urgency to BWS’s call for accountability.

The Navy did not immediately respond to requests for comment on the lawsuit, which now adds to a growing list of legal and political challenges stemming from the Red Hill disaster.

Local, state, and federal agencies have all been drawn into the fray, with mounting pressure to shut down the facility entirely and invest in comprehensive groundwater protection measures.

The Red Hill incident has also prompted broader discussions about the military’s environmental stewardship in Hawaiʻi and the balance between national security infrastructure and local health and environmental priorities.

For many residents and officials, the lawsuit is not just about recovering funds—it’s about setting a precedent and ensuring that those responsible for environmental harm are held accountable.

As the case moves forward, it’s likely to become a pivotal moment in Hawaiʻi’s environmental and legal landscape, particularly as the state grapples with how best to secure its most vital resource—clean water—for generations to come.

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