Is the Columbia River toxic to dogs? Health authorities' response

Unofficial social media posts recently warned pet owners not to let their dogs into the Columbia River, saying it contains toxic algae that can be fatal to dogs if they come into contact with the river.

Maria Christina Monroe of the Chelan Douglas Health Department says potentially toxic cyanobacteria algae cannot grow in the fast-flowing, cold water of the Columbia River.

The CDHD has received no reports of outbreaks or algal blooms on the Columbia River in either county.

Cyanobacterial algae can develop in standing water such as ponds or small lakes.

Cyanobacteria are also toxic to pets and should be avoided.

Monroe says both people and pets should avoid contact with water that has foam, green slime or a septic odor.