A second case of blue and green algae has been spotted in a Lincoln lake and people have been warned to stay out of the water.
The City of Lincoln Council said the potentially dangerous algae has been identified at Hartsholme Country Park and the Environment Agency have been alerted.
It’s the second case in the area after green algae developed in the Millennium Lakes in North Hykeham last week.
Some types of blue-green algae are toxic to humans and animals and it is essential that people and their pets do not come in to contact with the lake water while the algae is in bloom.
Signage has been placed around the park warning people the algae might be present and to stay away from lake water and will remain in place until the council is satisfied there is no danger.
Green-blue algae blooms occur naturally in non-flowing fresh water and will dissipate in their own time, and the council will monitor the situation until the water is safe.