Alberta Health Services lifted blue-green algae advisories for Pine Lake and Pigeon Lake on Wednesday.
AHS originally issued an advisory for Pigeon Lake on July 27 and for Pine Lake on Aug. 21.
Blue-green algae produce a toxin that can cause serious illness to animals or humans who drink or have skin contact with water containing this toxin.
Boiling water does not eliminate the toxins.
Advisory signage posted around the lakes has been removed.
Blue-green algae can develop from long periods of warm weather if there are nutrients in the water from agricultural activities like fertilizer and animal waste, or human waste from cottage activity.