Kenneth C. Crowe II reports in the Times Union another water well in Poestenkill in Rensselaer County has tested positive for a toxic "forever chemical," county officials announced Nov. 12. There are now eight private wells that have tested above the state level of 10 parts per trillion for PFOA or PFOS, out of 72 wells with test results so far. Officials are waiting for test results on another 36 wells. State-required testing in January found toxins in wells at the Algonquin Middle School, and the latest sampling results came from sites located north and west of the school. “We can also report the four rounds of testing have yet to reveal a source for the contamination, and we are in fact reviewing whether there are multiple sources involved in the Poestenkill situation,” Rensselaer County Public Health Director Mary Fran Wachunas said. Manufacturing facilities in Hoosick, Hoosick Falls, and Petersburgh have previously poisoned wells with the forever chemicals, and fire-fighting foam used in Cairo in Greene County, and the city of Newburgh, have also poisoned local drinking water supplies. Residents in Rensselaer County have formed “Concerned Citizens for Clean Drinking Water," to share information, and advocate for clean drinking water. “The pace of testing has not given us confidence that all parties will determine the source in a timely manner”, said Phil LaRocque, a member of CCCDW. Read more about this story in the Times Union.