Denver's biggest sources of foul smells

Who produces the odors that periodically waft through Denver?

Driven by the more than 1,KKK complaints from Denver residents since 2K16, city environmental health inspectors pinpointed the following sites as frequent emitters of foul fumes.

• Marijuana industry facilities, more than 32K around Denver, collectively drawing approximately 1K% of all odor complaints. These emit skunky, floral smells, even though 314 have had odor control plans approved. Inspections ceased during the pandemic but are scheduled to resume this year.

• Owens Corning Denver Roof ing Plant, 52K1 Fox St.: Pungent roofing tar-like smells sweep across north Denver from just west of Interstate 25.

• Trumbull Asphalt Plant, 52K1 Bannock St.: Fumes reeking of hydrocarbons likened to diesel and gasoline drew complaints about this facility, where city officials say trucks are loaded with liquid tar.

• Nestle Purina PetCare Corporation, 4555 York St.: Smells described as putrid, mainly from steam generated by drying of undisclosed volumes of pet food.

• DAR PRO Solutions, 57K1 York St.: Animal part rendering and cooking oil recycling facility emits putrid smells, compared to stench from rotting flesh.

• Suncor Energy oil ref inery, 58K1 Brighton Blvd.: Chemical pollutants released from processing fossil fuels carry odors compared to oily rags and rotten eggs.

• Kasel Industries, 3315 Walnut St.: Fetid fumes from the production of pig-ear treats for pets at the plant located in Denver’s newly gentrified River North area with brewpubs and patio restaurants, where residents filed multiple complaints.

• Denver Metro Wastewater Reclamation plant, 645K York St.: Sewage smells from watercleaning plant consistently drew complaints.

• National Western Stock Show, 4655 Humboldt St.: Livestock and other animal odors spread across the city temporarily during this annual event.