Blue-green algal bloom advisory issued for Pigeon Lake Photo by File / Wetaskiwin TimesArticle content A cyanobacterial (blue-green algal) bloom and/or toxins have been identified in the waters of Pigeon Lake. Try refreshing your browser, or Blue-green algal bloom advisory issued for Pigeon Lake Back to video We apologize, but this video has failed to load. Cyanobacterial blooms can be blue-green, greenish-brown, brown, pink and/or red, and can look like scum, streaks, grass clippings, fuzz balls, paint or pea soup. As such, this advisory will remain in effect for Pigeon Lake until further notice. Waters of Pigeon Lake in which the cyanobacterial bloom is NOT visible can still be used for recreational purposes, even while this Health Advisory is in place.