The state says five samples collected last week from the Navy's water system show low levels of petroleum.
The samples were among 27 taken between Dec. 7 and Dec. 9 from several areas and buildings.
The Hawaiʻi Department of Health said five of the 27 results detected trace levels of petroleum products, well below the safe limit for drinking water.
Three samples were taken at Kapilina Beach Homes in ʻEwa Beach, a former military housing area on the Navy's water system. The two other samples were collected at McGrew Point in Pearl Harbor.
"Sampling only captures contaminant levels at a point in time and these results will not change DOH’s do-not-consume recommendation," the department said.
The DOH continues to recommend that Navy water system users should avoid using the water for drinking cooking or oral hygiene.
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