THE LOCAL ANSWERTake oil-based paint, stain and spray cans to the free household hazardous waste facility at 1033 Elm St (up to 20 gallons of oil paint a day). Latex paint isn't accepted. Dry it completely, double-bag it, and put it in your trash, or drop the dry cans at a Knox County convenience center.
Knoxville's household hazardous waste facility at 1033 Elm Street takes oil-based paint free, six days a week. It stopped taking latex in March 2018. City and Knox County both say to dry latex completely and throw it away.
Drive across the scale first
The hazardous waste drop-off is at the Elm Street Solid Waste Facility, off I-275 at the Baxter exit (#1A). Every visitor drives across the scale, even though accepted hazardous waste is free.
Wednesday and Saturday close before noon
Hours are Monday, Tuesday, Thursday and Friday 7 a.m. to 3:45 p.m., but only until 11:45 a.m. on Wednesday and Saturday. It's closed Sunday.
Twenty gallons of oil paint a day
You can bring up to 20 gallons of oil-based paint a day, counted by container size, and 100 pounds of hazardous waste in total. Nothing in a container over 5 gallons.
Use Knox County's upside-down test
Knox County says latex is dry enough to toss when you'd feel comfortable holding the can upside down. A crust on top isn't enough. Spread it thin, set it in the sun, or mix in kitty litter, wood chips or sawdust.
Free reuse shelf at the facility
Usable products still in their original containers are set aside for reuse. Residents who sign a waiver can pick them up free.