A Household Chemical Roundup will be held Saturday, September 20 from 8 a.m. to 3 p.m. in the Thornton SuperKmart parking lot, located at 1400 East 104th Avenue. This event offers residents a safe and efficient method for proper disposal of household chemicals, such as home and garden chemicals, paint, and auto fluids. Proof of residency, such as a driver's license, is required to participate in the free program. For more information, call 303-846-6249 or 303-538-7348.