Middletown, PA, the town on shore by TMI, received between 5 and 8 times more radiation from the accident at Chernobyl than it did from the accident at TMI. (Personal communication with the head of PA’s nuclear monitoring agency.) The elevated radiation in the area comes from the Brunner Is. coal-fired power plant, 3 miles down river. It burns 3.5 million tons of coal every year and releases a bunch of radioactive nucleides contained therein from the stack. It’s slowly converting to natural gas, on balance a big improvement, fracking notwithstanding.