SUDBURY -- Public Health Sudbury & Districts is reporting a possible blue-green algal bloom at three beaches on Ramsey Lake.

In a news release late Tuesday afternoon, the health unit said blooms may be present at Amphitheatre, Maintenance and New beaches on the lake.

"The Ministry of the Environment, Conservation and Parks is testing water samples to confirm the presence of blue-green algae," Public Health said. "As a precaution, Public Health Sudbury & Districts has posted signs advising the public to avoid swimming, drinking the water, and allowing pets into the water if the algal bloom is present at the beach."

Blue-green algal blooms could also appear in other parts of the lake, because blooms are not anchored and can move from one location to another. Plus new blooms can also form.

Public Health said all residents on lakes or rivers should look for blooms in their area.

"Blue-green algal blooms have an unsightly pea soup appearance and foul smell, and can produce toxins," the release said. "The highest concentrations of toxins are usually found in blooms and scum on the shoreline. These dense accumulations pose the greatest potential risks to people and pets."

The algae toxins can irritate a person’s skin and, if ingested, cause diarrhea and vomiting. If a person ingests high levels of toxin, they could suffer liver and nervous system damage.

For more information on blue-green algae, including a list and map of water bodies with confirmed blooms, please visit Public Health's website  or call 705-522-9200, ext. 398, or toll-free 1-866-522-9200.