Restrictions lifted at Powys reservoir after algae levels 'no longer a health risk'

The levels have dropped to a level where it no longer presents a health risk and permitted activities on the reservoir are able to resume as normal.

The algae was identified in November which led to a restriction of activities at the reservoir, especially where immersion in the water was likely.

Regular monitoring by Natural Resources Wales has taken place at the reservoir since the algae was identified.

The algae produces toxins that can cause skin rashes, nausea, vomiting, stomach pains, fever and headaches.

Powys County Council has said that the last two consecutive weekly samples taken from the reservoir are below the warning threshold.

Natural Resources Wales has advised site owners Hafren Dyfrdwy that the blue-green algae bloom has subsided.

Hafren Dyfrdwy have informed those who operate on the water (sailing, water sports and fishing), and the adjacent landowners and visitors that the algal levels have now dropped.

The build-up of blue-green algae at Llyn Clywedog reservoir is a natural occurrence which occurs from time to time during warm conditions. It is always possible that a blue-green algae bloom may return.

Earlier this year, Natural Resources Wales said levels of concern were in the shallow parts of the reservoir.

One of mid Wales’ most spectacular visitor sites, Llyn Clywedog offers breathtaking views and is an ideal habitat for wildlife.

Popular activities include water sports, bird watching, walking and fishing.

In January, businesses that rely on accessing the reservoir feared the restrictions may cause “devastating” loss of income and affect the wider local economy following two years of coronavirus restrictions.

For further information, contact Powys County Council on 01597 827 467. Anyone who has health concerns, can contact their GP or NHS Direct Wales on 0845 4647.

To report any further signs of blue green algae, call Natural Resources Wales on 0300 065 3000, 24 hours a day.