The Metropolitan Water Reclamation District of Greater Chicago is hosting an open house at its Skokie plant, 3500 Howard Street, on Saturday, May 18, 2019, from 9 a.m. to 1 p.m. The event features tours, free compost, free oak saplings and kid-friendly activities. The Cook County Sheriff's Office will collect electronic waste and paper for shredding, and unused medications can be brought for proper disposal.