Signs have been put up warning the public of the algae and dangers to pets and children.
Dangerous algae has appeared at an Angus beauty spot.
High concentrations of blue algae have been found at Keptie Pond in Arbroath.
Notices have been put up at the side to warn people to keep their pets to stay out of the water.
An Angus Council spokesman said: “Recent sampling has identified high levels of blue-green algae and until the all clear is given we are asking visitors to avoid contact with the water and keep their pets away.
“Contact can cause harmful effects such as rashes, vomiting, diarrhoea, muscle or joint pain and can be severe.
“When in high concentrations in the water this naturally occurring algae can multiply to cause algal blooms which may then release toxins.
“The behaviour of algae is erratic and the levels of its toxicity can fluctuate. It can appear one day, be dispersed by the wind and re-accumulate at any time.”
Anyone with concerns is asked to contact the council’s ACCESSLine on 08452 777 778.
