Household Chemical Roundups

Household chemical roundup community events help dispose of chemical waste properly, prevent pollution, and protect the people handling your garbage. 

Review your county's information below. You can also call the Household Chemical Roundup hotline at 303-846-6249. We coordinate Douglas County events only. Adams County and Arapahoe County events are organized by their individual cities. Contact your county or city for their next event.

  1.  Douglas County 
  2. Other Options
  3. Arapahoe County 
  4.  Adams County 

Household Chemical Roundup Mini Pop-Up Events

In response to safety precautions involved with the pandemic, our event structure has changed. We are now offering appointment-only mini pop-up events for Douglas County residents. Registration is limited to 200 appointments. Please provide proof of residency and a $25 credit card-only fee. Non-Douglas County residents will be charged $90.

Flyer giving information on Household Chemical Roundup event with list of acceptable itemsRegister today for the Douglas County Fairgrounds Event - Registration FULL

Registration is FULL, there is no waitlist, but if there are cancellations you may sign up: Household Chemical Roundup Registration

9 a.m. - 1 p.m. on  Saturday, June 19 at 
500 Fairgrounds Road Castle Rock, CO 80104

New events will be posted to this page as they are scheduled. The next registration link will open June 22, 2021.

Acceptable Items to BringUnacceptable Items
  • Paint and paint products*
  • Motor oil
  • Antifreeze
  • Automotive fluids and fuels
  • Vehicle batteries
  • Solvents
  • House and garden chemicals
  • Fluorescent light bulbs
  • Compact fluorescent lights (CFLs)
  • Cleaning supplies
  • Items containing mercury
  • Propane tanks (1-20 lbs)
  • Fire extinguishers
  • Flares
  • Business waste
  • Radioactive waste
  • Smoke detectors
  • Electronic waste
  • Oil drums
  • Asbestos
  • Sharps/medical waste
  • Tires
  • Explosives

*Paint products may be taken to nearby paint stores for free with a maximum of 5 gallons per store. Find locations near you at

Free Electronic Waste for Douglas County Residents

Techno Rescue, 3251 Lewiston St, Aurora, CO 80011
Hours: 8 a.m. - 4:30 p.m. Weekdays; one Saturday per month from 10 a.m. - 2 p.m.
Bring proof of residency for free disposal 

For more information, review the Douglas County Electronics Recycling webpage or call 303-482-2207.

Safe Handling of Household Hazardous Items

Many common products found in your home may be hazardous to you, your family, and the environment if used or disposed of improperly. Some of these chemicals include oil-based paint, mercury, gasoline, degreasers, cleaning compounds, and garden chemicals.  

Disposing of chemicals properly reduces harm to sanitation workers, sewage treatment plants, and landfills. It also protects our environment by reducing pollution in our water and air.

It is important to read the product labels to safely store, use, and dispose of chemicals. When these chemicals are not used up entirely, they become household chemical waste. Find safe handling tips by visiting the EPA's Household Hazardous Waste webpage.