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Tri-County Health Department News

Posted on: May 14, 2021

Douglas County Household Chemical Roundup on Saturday, June 19

Cars lined up outside to drop off their items

The Douglas County Household Chemical Roundup Program has implemented a new model for our recycling events. Come to our new appointment-only pop-up-style event to dispose of all of your household chemicals. This event will be Saturday, June 19, from 9 a.m. to 1 p.m. in the Douglas County Fairgrounds parking lot at 500 Fairgrounds Road in Castle Rock.

To promote safety during the pandemic, appointments are required and can be made by clicking the registration link at for pop-up events will be limited to 200 callers on a first come, first served basis. Please wear a mask and self-screen for symptoms in consideration of our volunteers. Douglas County participants should bring proof of residency, such as a driver’s license or utility bill, and a credit card for the $25 per vehicle admission fee to offset the cost of hazardous waste disposal. 

Many common products found in the home may be hazardous and should be used and disposed of carefully. These include motor oil, antifreeze, vehicle batteries, solvents, house and garden chemicals, compact fluorescent lights (CFLs), fire extinguishers, propane tanks, oil-based paint, and gasoline. Proper disposal at the Roundup helps lower the potential for accidental poisonings and fire hazards in the home. 

Residents with unwanted architectural paint and paint products can now conveniently drop off these products for recycling year-round at many locations in the Metro Denver area. The Paint Stewardship Program is operated by PaintCare and is a free option for paint recycling throughout the year at participating retailers. Visit for paint drop-off locations.

The Douglas County Household Chemical Roundup cannot accept waste from businesses and is not able to accept radioactive waste, smoke detectors, electronic waste of any kind, scrap metal, oil drums, asbestos, medical waste, sharps, or explosives. Due to the small size of the event, we also will be unable to accept items we may have accepted in the past, including tires or flares.

The Household Chemical Roundups are sponsored by: Douglas County; Centennial Water and Sanitation District; Highlands Ranch Metro District; Parker Water and Sanitation District; Plum Creek Wastewater Authority; South Metro Fire Rescue; Town of Parker; City of Lone Tree; Castle Pines North Metro District; Inverness Water and Sanitation District; Cottonwood Water and Sanitation District; High Prairie Farms Metro District; Louviers Water and Sanitation District; Perry Park Water and Sanitation District; Roxborough Water and Sanitation District; and Tri-County Health Department.

In 2020, the Douglas County Household Chemical Roundup Program properly disposed of 34,423 pounds of hazardous materials and an estimated 279 households were served. Review details about this program and upcoming events at For information on how to dispose of other materials, visit the Tri-County Health Department A-Z Recycling Guide at


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