Epuration NDDL Wastewater Treatment Plant - Témiscouata-sur-le-Lac, Québec

Epuration NDDL is a municipal wastewater treatment plant located in the Notre-Dame-du-Lac sector of Témiscouata-sur-le-Lac, Québec, Canada. The plant serves a population of 1,482 and is part of the region's wastewater infrastructure in the Bas-Saint-Laurent area. It operates under the regulatory framework of the Canadian Council of Ministers of the Environment (CCME) and provincial Québec environmental regulations. As a small-scale facility, the plant is expected to provide at least secondary treatment under Canadian wastewater regulations, which require effluent quality standards for carbonaceous matter, suspended solids, and, where applicable, nutrients. Typical small municipal plants in Québec use aerated lagoons or activated sludge systems. The plant discharges treated effluent into the local watershed, which ultimately drains into the Saint Lawrence River via the Madawaska River and Lake Témiscouata. This water body supports diverse aquatic life and is an important recreational and ecological resource in the region. The plant's operation helps protect downstream water quality in the Saint Lawrence River system.

The plant discharges into the Madawaska River, which flows through Lake Témiscouata and eventually into the Saint Lawrence River, one of the largest estuaries in the world. The receiving waters support a variety of fish species, including brook trout and Atlantic salmon, and are used for recreation and drinking water. The Saint Lawrence River downstream is ecologically sensitive, hosting diverse aquatic habitats and migratory bird populations.