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. Please provide proof of residency and a $25 credit card-only fee. Non-Douglas County residents will be charged $90.

LocationDate/TimeRegistrationFlyer
Douglas County Fairgrounds
500 Fairgrounds Road Castle Rock, CO 80104
Saturday, June 19
9 a.m. - 1 p.m.
Follow our registration link to sign up!


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 (1-20lbs)
  • 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 (see paintcare.org for locations near you)

Electronic Waste for Douglas County Residents

Techno Rescue
3251 Lewiston St, Aurora, CO 80011
Hours: Weekdays 8 a.m. - 4:30 p.m.
One Saturday per month 10 a.m. - 2 p.m.
303-482-2207
Visit the Website for more information
Bring proof of residency for free disposal

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.