Clark County Public Health is raising an alarm, urging residents to be vigilant about a recently identified threat in the Columbia River: benthic algae mats, which may be toxic to humans and pets. An unfortunate incident in October brought to light the dangers of these algae when a dog died from cyanotoxin poisoning after consuming algae along the river's shoreline, as reported by Clark County, Washington.
These algae mats can break away and become perilous floaters or unwelcome beach debris. Following the dog's demise, health officials have acted, placing educational signs at various points along the river, including marinas and boat launches. Recently, similar algae potentially laden with toxins were spotted at Cottonwood Beach in Washougal, triggering further caution from authorities, who have yet to receive reports of illness from this location.
Potentially harmful algae should not be taken lightly; residents are advised to scan waterbodies for unusual clumps of various colors, ranging from bright to dark green, yellow, brown, orange, or red. Slimy and possibly stinky, these mats are a sign to keep both yourself and your pets away. Children and dogs, in particular, are at high risk from the toxins these algae may harbor.
Public Health has not only targeted benthic algae mats but also warns of the familiar planktonic algae blooms. These are already known to the community for triggering advisories in local lakes like Vancouver Lake and Lacamas Lake in Camas. Such blooms, which create a scummy appearance on the water's surface, are another variety to avoid. To ensure safety, avoid any water where algae, either planktonic or in mat form, are found.
