Additionally, mallards and wood ducks living around Green Bay from the city of Marinette across to Sturgeon Bay should not be consumed frequently — no more more often than once per month for mallards and only one meal per week for wood ducks. Back in 2022 levels of polychlorinated biphenyls (PCBs), another man-made chemical, in waterfowl led to similar advisories in lower Green Bay. The inquiry suggested that both adult and juvenile ducks in lower Green Bay have higher concentrations of PFOS than in the northern portion of the bay. The DNR tracks PFAS consumption advisories spanning multiple species including deer, fish and waterfowl. On Sept. 4, deer and fish advisories for PFAS were issued for the Town of Stella and surrounding waterbodies in Oneida County.