Tarping operation in progress.
The tarping operation, under the supervision of the RAPPEL is currently underway for its third summer.
This summer, divers from the RAPPEL, with the help of our volunteers, are removing the weight bags that were installed last summer. The divers then performed manual harvesting of the Eurasian watermilfoil.

7
Number of municipalities that are present within the Lake Davignon watershed
209
Surface area, square kilometers, of the Lake Davignon watershed
680
Elevation drop, in meters, of the Lake Davignon watershed (from the Sutton Mountains)
A short history.
The Lake Davignon Watershed Protection Committee (CSBVLD) is a non-profit organization (NPO) founded in 2007 by citizens of Cowansville concerned about the health of the lake. The committee’s mission is to do everything possible to preserve and improve water quality, an essential objective, given that Lake Davignon is the source of drinking water for the City of Cowansville.
Like many other lakes in Quebec, Lake Davignon is affected by blue-green algae (cyanobacteria) contamination, as well as other phenomena such as sedimentation, invasive species, and shoreline erosion. With the help of several partner organizations, governments, and citizens, the CSBVLD believes it is possible to maintain and even improve the water quality of the lake and its watershed.
In collaboration with citizens, OBV Yamska, MRC Brome-Missisquoi, and the City of Cowansville, not to mention the six other municipalities that cross the Lake Davignon watershed (Dunham, Lac-Brome, Sutton, West Bolton, Brome, and Potton), the committee is dedicated to raising public awareness about the importance of water conservation.
The committee's other objectives include:
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Inventorying all sources of pollution and problematic sites on and around the lake.
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Proposing solutions to identified issues and, whenever possible, participating in their development.
Map of the Lake Davignon watershed.
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©Dumont Design Graphique
The Lake Davignon watershed.
We have the privilege of living in a region bordered by waterways. We therefore benefit from protecting our natural heritage.
The space created by the lake and all its tributaries (such as the Yamaska River and several streams) forms the watershed. This area deserves all of our attention. It is crossed by seven municipalities: Cowansville, Dunham, Lac-Brome, Sutton, Bolton-Ouest, Brome, and Potton. The Cowansville Nature Center is also an enchanting place that must be protected. It is so enjoyable to engage in a host of activities in this little oasis within the municipality.
Unfortunately, by living near a waterway, we can sometimes contribute, unintentionally, to its deterioration. Often, due to a lack of knowledge, we perform actions that risk having a negative impact on the health of the lake or its tributaries. For example, to enjoy a beautiful view of the lake, some decide to cut down the trees on their property. Others replace natural vegetation with lawn and add fertilizers.
However, we must keep the shoreline as natural as possible to protect the ecosystem. The municipalities within the watershed must continue their work to control sediment input, while also ensuring the elimination of fecal coliforms in the waterways.
In 2009, Cowansville brought together all stakeholders involved in the watershed, with the collaboration of OBV Yamaska, to develop a strategy covering municipal regulations, sewage systems, stormwater management, road infrastructure, and citizen awareness. The state of Lake Davignon and its watershed was updated in the 2018 version of the Lake Davignon Watershed Master Plan (Plan directeur de l'eau).

Financial partners
Guy St-Louis, lakeside resident
Collaborators
City of Cowansville
MRC Brome-Missisquoi

Association de conservation
du Mont Écho









