A public forum is set for Thursday in Brunswick following the Aug. 19 incident in which 1,450 gallons of hazardous firefighting foam was accidentally released at the Brunswick Executive Airport.

The foam, which mixed with 50,000 gallons of water, contains PFAS chemicals linked to certain types of cancers and other health problems.

It’s the largest accidental discharge of the firefighting foam in Maine since the 1990s.

State officials have warned against eating fish from four waterbodies near the former naval air station and advised against swimming, boating or wading in water where the foam is present.

On Friday, the Maine Center for Disease Control and Prevention said even before the latest foam spill, elevated levels of PFAS were detected in fish tissue samples collected from Mere Brook, also known as Mare Brook, Merriconeag Stream, Picnic Pond, and Site 8 Stream.

However, the public drinking water supply to Brunswick Landing comes from the Brunswick-Topsham Water District and is safe to drink, according to the Maine Department of Environmental Protection.

On Thursday, DEP Commissioner Melanie Loyzim and CDC toxicologist Dr. David Smith will join state lawmakers and others at a public forum set for 6:30 p.m. in Town Hall. The forum is being hosted by the Brunswick Town Council, according to Town Manager Julia Henze.

PFAS are a group of man-made chemicals in many consumer products. They have been linked to increases in cholesterol levels, decreases in birth weight, lower antibody response to some vaccines and kidney cancer, according to the Maine CDC.

As of Monday afternoon, the hangar where the spill occurred has been cleaned and crews are cleaning the planes. Four vacuum trucks are removing foam from surface water retention ponds and all PFAS contaminated water will be transported out of state, according to DEP.