The Harmful Algae Bloom on Lake Erie continued to expand this week.
The size of the Harmful Algae Bloom is up 20 square miles from last week, and now covers 620 square miles of Lake Erie’s surface. To put the size of the bloom in perspective, the bloom would cover the entire Detroit metro area and suburbs.
The blue-green algae produces cyanotoxins, with the most common toxin called microcystin. These cyanotoxins can tax human and animal bodies in several ways.
Just the sight of blue-green algae can not be used to predict the amount of toxin, according to the Michigan DEQ. Water samples must be analyzed for the presence of toxins to confirm that a bloom has the potential to be harmful to humans, pets, or livestock.
The Michigan DEQ says there are four things that contribute to toxic algae blooms. Shallow calm water, warm water temperatures, high phosphorus levels and zebra or quagga mussels all can help HABs grow.
Lake Erie has had all four of the above in the past few weeks.
It isn’t possible to visually determine whether an algal bloom is producing toxins. Therefore, the best course of action is “when in doubt, stay out.” If you or a pet has been in the algae bloom, thoroughly rinse off with clean fresh water. The DEQ says to seek medical treatment as soon as possible if you think you or your pet may be experiencing health impairments due to algal toxin exposure.
Warm weather, plenty of sun and warm water should keep the toxic algae bloom expanding this week.