Don’t be alarmed if the Speed River in Guelph turns pink next week.
The city says it is using an environmentally-friendly dye to test flow patterns at its wastewater treatment plant on Wellington Street.
The test will happen between June 9-12 and people may see a pink tint in the water for up to 24 hours between the plant and Wellington Road 32.
“Dye tracers are a common way to test travel time and see how things spread in rivers and other waterways,” the city said.
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The dye should dilute as it moves downstream.
The city said it doesn’t reduce oxygen levels in the river and is safe for people, pets, aquatic life and other wildlife.
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