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Household hazardous waste drop-off in St. Charles County, Missouri

In St. Charles County, programs may be called HHW, household chemical waste collection — the listings below use each agency's own name.

2 listings in St. Charles, Wentzville. A county site may be open only to residents of that county or of member cities.

Call ahead. Hours, fees, residency rules, appointments and accepted materials change. Check the official page or call before you go. Never mix chemicals, and keep products in their original containers. Every listing links to its official source.

Listings in St. Charles County

• St. Charles County Recycle Works Central Household Hazardous Waste

  60 Triad South Drive, St. Charles, MO

  • Collection event
  • Paint
  • Used motor oil
  • Pesticides & garden chemicals
  • Household chemicals & cleaners
  • Other household hazardous waste

  Dates: May 1 through September 30, Tuesday through Friday, 9:00 a.m.–3:00 p.m.

  Hours: May 1 through September 30, Tuesday through Friday, 9:00 a.m.–3:00 p.m. No appointment is necessary.

  Source: St. Charles County · checked November 9, 2026

• St. Charles County Recycle Works West Household Hazardous Waste

  2110 East Pitman Avenue, Wentzville, MO

  • Collection event
  • Paint
  • Used motor oil
  • Pesticides & garden chemicals
  • Household chemicals & cleaners
  • Other household hazardous waste

  Dates: May 1 through September 30, Tuesday through Friday, 9:00 a.m.–3:00 p.m.

  Hours: May 1 through September 30, Tuesday through Friday, 9:00 a.m.–3:00 p.m. No appointment is necessary.

  Source: St. Charles County · checked November 9, 2026

More household hazardous waste listings in Missouri