ARUNDEL, Maine (AP) The owners of a Maine dairy operation and a group of environmental advocates say they are concerned chemicals that contaminated the farm could be lurking on other farms in the state and beyond.

Members of the Environmental Health Strategy Center cite state records that say sludge spread at Stoneridge Farm in Arundel was a source of perfluoroalkyl substances, also known as PFAS. The substances were found in high levels in the milk of cows on the farm.

Farm owner Fred Stone says he wants the state to take steps to ensure other families don’t go through the same experience, which he says “ruined my farming.” The environmental group and the farm are raising concerns about two weeks after Democratic Gov. Janet Mills created a task force to review PFAS prevalence.