Concord General Services is hosting its annual Household Hazardous Waste Collection Day for Concord and Penacook residents on Saturday, September 13, 2025, from 9:00 a.m. to 3:00 p.m. at the Douglas N. Everett Arena, located at 15 Loudon Road. Residents can bring their unwanted household hazardous waste to the event to safely dispose of harmful materials. Household hazardous wastes are leftover household products that are toxic, ignitable, corrosive, or reactive, such as cleaners, paint, pesticides, adhesives, polish, and fuels. Hazardous…