The Maryland Departments of Agriculture, Environment, Health, and Natural Resources have issued a health alert regarding harmful algal blooms detected in the Potomac River, stretching from below Williamsport to Riley Lock. Pet owners are strongly advised to prevent their animals from entering the water in this region until further notice due to the potential health risks.
The algae, resembling mats of fine, green cotton, have been observed along the shoreline, attached to rocks or plants, and can also be found on the river bottom or floating downstream. These algal blooms are composed of cyanobacteria, also known as blue-green algae, which can produce toxins harmful to both humans and animals.
Exposure to these toxins can be deadly for pets and livestock, causing symptoms such as loss of energy, vomiting, diarrhea, and more severe reactions like convulsions and seizures, potentially leading to death within hours to days. The Maryland health authorities recommend keeping pets and livestock away from affected waters and urge immediate washing with clean water if contact occurs.
Pet owners should monitor their animals closely and consult a veterinarian if any signs of illness appear after exposure to water. For any concerns related to cyanobacterial toxin poisoning, contacting the ASPCA Animal Poison Control Center or the Pet Poison Helpline is advised, though be aware that fees may apply for these services.
This warning remains in effect until it is deemed safe for animal contact with the water in the affected stretches of the Potomac River.
