Otsego County is planning events hazardous waste collection events in September. Households can drop off waste Friday, Sept. 8 at the Unadilla Town Barn, Unadilla NY from 8:00 a.m. until 11:00 a.m. and on Saturday, Sept. 9 at the Meadows Office Complex in Cooperstown NY between 8:00 a.m. until 1:00 p.m. Authorities say last year 550 cars from an estimated 600 households brought various hazardous materials for disposal.