Brookhaven Calabro Airport in Shirley has been added to the state Superfund list following the discovery of groundwater contaminated with toxic "forever chemicals" at the 600-acre site.

State officials, in a letter last month to nearby residents, said the cause of the contamination appears to be firefighting foam commonly used at airports and other locations with large supplies of oil.

Long Island MacArthur Airport in Ronkonkoma was added to the state Superfund list in 2023, also because of groundwater contaminated by firefighting foam.

Calabro, owned by Brookhaven Town, was found to pose a "significant threat to public water" because of perfluorooctane sulfonic acid, known as PFOS, and perfluorooctanoic acid, or PFOA, the state Department of Environmental Conservation told resident

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