An air quality advisory for the Cowichan Valley put in place by the Ministry of Environment and Island Health last weekend has been lifted.
"Pollutant concentrations and the associated health risk are now lower due to changing weather conditions," said a press release.
Air quality has improved due to a "cleansing" weather system that has brought rain to the region.
The advisory had warned those with pre-existing conditions like respiratory problems or heart disease to stay indoors where the air is filtered, and to postpone any vigorous exercise.
The concerning level of particulates in the air was attributed to industry, open burning, the increased use of woodstoves and fireplaces that comes with winter weather and idling vehicles.
Open burning restrictions put in place alongside the air quality advisory have also been lifted.