City of Greeley officials said the municipal drinking water is safe to drink, cook with, and bathe in despite a taste and odor event [1, 2].
The situation matters because unusual changes in the smell or flavor of tap water often cause public alarm regarding health risks and water quality. City officials said they are working to reassure residents that the current sensory changes do not indicate a safety hazard.
The issue originated at the Boyd Lake Water Treatment plant in Greeley, Colorado [1, 2]. According to the city water department and the mayor’s office, the unusual taste and odor were caused by algae compounds released into the water [1, 2].
While the water may have an earthy or unpleasant quality, officials said testing shows no health risk to the public [1, 2]. The city continues to monitor the water quality to ensure it meets safety standards while the algae-related compounds are managed.
Residents are encouraged to continue using the water for all standard household needs. The city has not issued any boil-water advisories or restrictions on usage, as the compounds responsible for the odor do not compromise the biological or chemical safety of the supply [1, 2].
“The municipal drinking water is safe to drink, cook with, and bathe in.”
This event highlights the challenge municipal water systems face when dealing with seasonal organic matter, such as algae blooms. While these compounds can create significant aesthetic issues—such as earthy smells or bitter tastes—they are typically non-toxic, meaning the water remains potable even when it is unpleasant to the senses.
