Blue-green algae has been found at Llandrindod Lake and as a result Powys County Council is recommending that activities - especially where immersion in the water is likely - are restricted.

The algae is able to produce toxins within the water which can cause skin rashes, nausea, vomiting, stomach pains, fever and headache if swallowed. Occasionally it can be responsible for more serious illness such as adverse effects on the liver and nervous system.

The blue-green algae (also known as cyanobacteria), occur naturally in inland waters, estuaries and seas and it is impossible for them be removed or treated. They are most likely to come and go during the summer season due to them thriving in warm conditions.

Given the potential health risks caused by blue-green algae, the council has advised people to take the following precautions when visiting the area:

• Do not swim in the water or to become immersed in it, eg stand-up paddle boarding

• Do not swallow the water

• Avoid any form of contact with the algae

• Avoid eating any fish caught in Llandrindod Lake

• Stop pets or livestock from coming into contact with the water

• Observe and abide by notices positioned around Llandrindod Lake

Anyone who has come into contact with water containing blue-green algae must take action immediately by showering with fresh water.

Anyone who has come into contact with affected water and has become ill with the symptoms mentioned above should obtain urgent medical attention from their local hospital.

For further help and advice, the public can contact Powys County Council’s Countryside Access and Recreation Team by calling them on 01597 827500.