The Ministry of Environment has issued an air quality advisory for Smithers due to pollution levels.
Officials say there are high concentrations of fine particulate matter in the local airshed.
People with chronic underlying medical conditions should postpone strenuous exercise until the advisory is lifted. Exposure is a particular concern for infants, the elderly, and those with diabetes, lung, and heart disease.
Woodstoves use is prohibited within the Town of Smithers during air quality advisories, unless it is the only source of heat.