GRCA to conduct dye tracer testing in the Conestogo River

Sometime during the week of December 18, 2023, the Grand River Conservation Authority (GRCA) will be conducting dye tracer testing in the Conestogo River, upstream of the town of St. Jacobs near Three Bridges Road. The dye is environmentally friendly and may temporarily give the Conestogo River a yellow-green colour.

The dye will dilute quickly as it moves downstream though St. Jacobs towards Conestogo and Waterloo in the hours following the work, eventually becoming invisible. The dye is harmless to aquatic life and to individuals who may rely on the river for their water supply or recreational uses.

The dye tracer is being used as part of the routine maintenance of the GRCA’s water control infrastructure. The dye shows water flows over water control structures and helps GRCA staff assess the condition of these structures.

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Media Contacts:

Lisa Stocco, GRCA Manager, Strategic Communications and Environmental Education
Phone 519-621-2763 x2316  |  Email lstocco@grandriver.ca