Residents taking their dogs for a walk around Emerson Lake in High River need to be aware.

Alberta Health Services has detected small amounts of blue-green algae in the water.

The Town has posted signage around the lake warning users about the possible presence of blue-green algae.

According to the Town, residents should avoid contact with the water but they really want to get the message out not to allow pets to drink from the lake.

Kevin Tetzlaff with the Town says the colder weather and time of year means the risk is not as great but they wanted to err on the side of caution.