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Toxic Algae Blooms Threaten Grand River Watershed
16 Oct
Summary
- Blue-green algae blooms identified in Belwood Lake and Guelph Lake reservoirs.
- Toxins from blooms pose risks to humans and pets, causing various symptoms.
- Algae blooms can create scum on water, emitting foul odors as they mature.
The Grand River Conservation Authority has issued a warning regarding potentially toxic blue-green algae blooms discovered within the watershed. A significant bloom was observed in the Belwood Lake reservoir upstream of the Wellington Road 26 Bridge.
Additional blooms were previously noted at the northeast shoreline of the Guelph Lake Conservation Area reservoir and in the Shade's Mill Conservation Area, near the islands. These advisories will continue for the remainder of the season, as toxins may persist even after visible blooms dissipate.
The toxins generated by these algae are dangerous to both humans and animals. The blooms manifest as a green or bluish-green scum on the water, sometimes resembling spilled paint along shorelines. Initial scents can be mild, like fresh-cut grass, but evolve into a strong rotten garbage odor.
Exposure to these toxins can cause adverse health effects. Symptoms in humans can include skin rashes, eye and throat irritation, coughing, headaches, dizziness, and in severe cases, liver damage. Ingestion may lead to stomach pain, vomiting, and diarrhea.
