ALLEGAN, MI (WKZO AM/FM) – Recent test strip results from the Michigan Department of Environment, Great Lakes, and Energy (EGLE) testing of Swan Lake on November 18 showed that microcystin levels were no longer detected.
No cyanobacteria bloom were still present when EGLE at the time of collection. The Public Health Advisory issued on August 4, 2021 for Swan Lake is lifted.
Harmful Algal Blooms. (Photo courtesy Michigan Department of Environment, Great Lakes, and Energy (EGLE)).
ACHD first received notification from EGLE on suspected blue-green algae in Swan Lake on August 4, and a confirmation of the algal toxin microcystin present on August 6.
Advisory signs had been posted by the campground and boat launch urging people and pets to stay out of the water.
With winter activities around the corner, ACHD reminds those participating in such activities that cyanotoxins may build up in the meat of fish, especially in the guts or organs (liver, kidney, etc.).
The amount of toxin found in fish depends on a number of factors, including how badly and for how long the cyanobacteria has been blooming in the area where the fish are caught.
Those consuming fish should follow the Eat Safe Fish waterbody-specific guidelines, or Statewide Safe Fish Guidelines.
While winter algae blooms are not common, any drastic changes in water color (including red and green) should be reported to the state.
Suspicious-looking algae can be reported to EGLE by calling the Environmental Assistance Center at 1-800-662-9278 or sending an e-mail to AlgaeBloom@Michigan.gov.
ACHD will no longer provide updates on Swan Lake, unless there is reports of concern for new HABs. For more information on HABs, visit www.michigan.gov/habs.
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