Paint Thinners Illegal in Garbage & Drains Hazardous Waste FREE Household Hazardous and Electronic Waste Collection Event January 20, 2024 Saturday, January 20, 2024 More Info Get Reminder Never Dump Down the Drain Paint thinner is highly toxic and should never be dumped down the drain, in order to avoid contaminating waterways. Instead, dispose of as Household Hazardous Waste (HHW).