Sundridge Wastewater Treatment Lagoon - Strong Township, Ontario, Canada

Sundridge Wastewater Treatment Lagoon is a municipal wastewater facility located in Strong Township, Parry Sound District, Ontario, Canada. It serves a small population of 339 residents, operating as a secondary treatment lagoon system. The plant is situated inland, more than 10 kilometers from the coast, and discharges a daily volume of 641 cubic meters of treated wastewater. The facility provides secondary treatment, which is the standard level required under Canadian federal and provincial regulations for small communities. Under the Canada-wide Strategy for the Management of Municipal Wastewater Effluent, secondary treatment is mandated for all systems to reduce pollutants and protect receiving waters. The plant's design and operation align with these national standards. The treated effluent from the lagoon is discharged into local waterways that drain into the Lake Huron basin, part of the Great Lakes system. The facility plays a key role in protecting downstream aquatic ecosystems, including the health of the Great Lakes, by reducing nutrient and pathogen loads. Its location in a rural, forested area underscores the importance of maintaining water quality in sensitive northern watersheds.

The plant discharges into local streams that flow into the Magnetawan River system, which ultimately drains into Georgian Bay, Lake Huron. This region is part of the Great Lakes Basin, a globally significant freshwater ecosystem. The surrounding area supports diverse aquatic life, including cold-water fish species, and the facility's secondary treatment helps mitigate nutrient enrichment and protect downstream habitats.