Potentially toxic algae has been confirmed at Apex Park lake in Burnham-on-Sea, Sedgemoor District Council has said.
Recent tests by the Environment Agency confirmed that blue-green algae, known as cyanobacteria, is present.
A council spokesperson said: “Anyone who had come into contact with the water should wash with fresh water immediately.
“Anyone who has come into contact with the affected water and has become ill should obtain urgent medical attention.
“Public Health have been notified in case they have any admissions relating to exposure to the algae.”
The council said its advice is as follows:
- Dogs should not be allowed to drink, swim or paddle in the water
- Fishing is not permitted
- Do not eat fish caught from the water
- No swimming
- Avoid all contact with the water
- Observe and abide by notices surrounding the water
The Environment Agency will continue to monitor the situation on a weekly basis.
Many waters are susceptible to problems with blue-green algae, typically between June and November.
Once algal numbers are high, the bloom is likely to persist throughout the season, declining only at the onset of winter weather conditions.
The council spokesperson added: “On advice from Environmental Health, our Clean Surroundings team will carry out regular inspections of the lake to monitor any changes and check that adequate signage remains in place around the lake perimeter.
“There will be a record of each inspection, showing if all notices remain present or need replacing in case of any incidents.”