Authorities have issued a public health warning for Caerphilly’s scenic Pen y Fan Pond after toxic blue-green algae was detected in its waters. Caerphilly County Borough Council’s Environment Team advises residents and visitors to avoid contact with the algae, which poses potential health risks to humans and animals alike. Signs have been placed around the pond, cautioning visitors to prevent both themselves and their pets, particularly dogs, from entering or drinking the water.
The blue-green algae, scientifically known as cyanobacteria, can produce toxins that are hazardous when ingested or when they come into contact with the skin. For humans, direct exposure to the algae-contaminated water can lead to rashes, while ingestion may cause stomach issues and illness. Pets, particularly dogs, are at heightened risk, as they may instinctively enter or drink from the water, leading to potentially severe symptoms. The council strongly recommends that pet owners avoid letting animals enter the pond and thoroughly wash pets with clean water if accidental contact occurs.
A council spokesperson said, “The algae produces toxins which can be harmful to both humans and animals. Residents are advised to ensure pets, particularly dogs, do not enter the water of the pond. Should pets come in contact with the water, owners are advised to thoroughly wash the animal with clean water and seek precautionary advice from a qualified vet.”
The council has been closely monitoring the algae levels at Pen y Fan Pond and will continue regular inspections alongside Natural Resources Wales to manage the situation. Toxic algae blooms, often exacerbated by warm weather and nutrient-rich waters, have become increasingly common in lakes and ponds across the UK.
While signs have been placed around the pond, the council encourages any individuals with health concerns after contact with the pond water to contact the Environmental Health Team at Caerphilly County Borough Council via 01443 811 355. Local vets are also available for animal-related emergencies and concerns.
Local authorities emphasize that residents remain vigilant for updates and avoid the water until further notice.
