Since 2020, the Coalition for the West Credit River has worked to protect one of the few remaining native Brook Trout populations in southern Ontario from the proposed Erin Wastewater Treatment Facility. At full build-out, the facility will release 7,172,200 litres of sewage-effluent per day into the West Credit River.
We are currently addressing a request by the Town of Erin to the Ministry of the Environment (MECP) to begin operation of the wastewater treatment plant, despite delays in installing the required effluent cooling system. Operating the facility without a cooling system poses a risk of elevating river temperatures to levels that could be lethal to Brook Trout.
Brook Trout are a sensitive coldwater species that are intolerant of stream temperatures greater than 19°C for any sustained period, and yet the Environmental Study Report failed to include any provision for an effluent temperature limit or an effluent cooling system.
The Coalition’s achievements over the last 5 years:
- Built strong working relationships with the MECP, Town of Erin, Credit Valley Conservation and the Region of Peel.
- Done the field-work to collect five years of sewage effluent temperature data (June-October) from local wastewater treatment facilities to demonstrate potential impacts on stream temperature.
- Used this evidence, together with sustained advocacy, to secure key protections in the facility’s Environmental Compliance Approval, including:
- Final effluent must be maintained at or below 19°C on a 4-day moving average.
- An Effluent Cooling System must be built into the design.
- Quarterly summaries of all operating issues and corrective actions must be posted to the Town of Erin’s website.
- Real-time water quality and effluent temperature data must also be posted to the Town’s website for public access.
The West Credit River is a tributary of the Credit River. The West Credit headwaters originate in Wellington County’s Town of Erin then flow through the Niagara Escarpment UNESCO World Biosphere Reserve into Caledon’s Forks of the Credit in Peel Region.
To learn more https://cwcr.ca/
Contact Coalition for the West Credit River info@cwcr.ca





