You may have noticed a foul smell coming from the Primary Lagoon in Weyburn recently.

The lagoon, just south of the city is emitting an odour when the wind hits it from the south.

The odour is believed to be caused by the hot temperatures which is creating algae bloom and killing the waters oxygen supply.

City Engineer Blaine Frank says they are starting to add sodium nitrate to help give it more oxygen to help get it back to normal again.

Frank says the process could take up to a few days before the