Blue green algae can be found naturally in freshwater, but a combination of factors can trigger an “algae bloom”.

One of the mains reasons for this is eutrophication, which is an increase in nutrients.

Some of the reasons this this can happen include agricultural run-off, soil erosion, deforestation and sewage effluent. Blue green algae can be toxic to people and lethal to animals. By managing your off-mains sewage system properly, you are playing your part in ensuring blue green algae doesn’t take over your local lakes.

Please call the Environment Agency on 0800 80 70 60 to report your sighting. Do not enter, drink or swallow the water. Also keep children and pets away from the water.