Cardiff Sewage Lagoon - Secondary Wastewater Treatment in Highlands East, Ontario

Cardiff Sewage Lagoon is a municipal wastewater treatment facility located in the community of Cardiff, part of Highlands East in Haliburton County, Ontario, Canada. The plant serves a small population of 820 residents and operates under secondary treatment standards, which is typical for rural communities in the region. As a secondary treatment plant, Cardiff Sewage Lagoon uses biological processes to reduce organic matter and suspended solids before discharge. The plant's annual discharge volume is 368.00 megaliters. Under Ontario's regulatory framework, such facilities are subject to the Ontario Water Resources Act and Environmental Protection Act, which set effluent quality standards to protect receiving waters. The treated effluent from Cardiff Sewage Lagoon is released into local watercourses that drain into the Trent-Severn Waterway system, ultimately reaching Lake Ontario. This watershed supports diverse aquatic life and recreational activities. The plant's operation helps maintain water quality in the sensitive headwater streams of the Kawartha Lakes region.

The Cardiff Sewage Lagoon discharges into local streams that are part of the Trent River basin, which flows into Lake Ontario via the Trent-Severn Waterway. This watershed supports coldwater fish species and provides habitat for migratory birds. The region's lakes and rivers are ecologically sensitive, and the plant's secondary treatment helps mitigate nutrient loading that could otherwise contribute to algal blooms in downstream water bodies.