Tourists visiting the Lake District are being alerted to the presence of toxic blue-green algae, which can cause illness in humans and be fatal to animals, particularly dogs. To address this, approximately 80 permanent information boards are being installed across popular locations in Cumbria, including Lake Windermere.
The cyanobacteria blooms thrive in still bodies of water like lakes, reservoirs, and slow-flowing rivers, with growth accelerating during hot, dry weather. Nutrients from pollutants such as sewage can also contribute to their proliferation.
Signs are being erected by Lake Windermere and other sites across Cumbria to inform the public about the potentially dangerous algae. Each sign will detail what the algae looks like, aiding identification of these blooms. The initiative is funded by the Environment Agency and is a collaborative effort within the Love Windermere partnership.
These permanent signs will offer year-round information on blue-green algae, including its appearance, how to find current bloom data, and how to report sightings. They will also direct users to resources like the Bloomin’ Algae app for up-to-date information.
Exposure to the algae can occur through swallowing contaminated water, inhaling airborne droplets, or direct contact with affected water. Symptoms in humans can range from nausea, diarrhea, and vomiting to eye or throat irritation and breathing difficulties. For animals, ingestion of the water containing the algae can be fatal.
Visitors planning to engage in water-based activities are advised to check current conditions before their trip and to familiarize themselves with the signs of blue-green algae. Liz Cheslett-Davey, catchment coordinator at the Environment Agency, emphasized that algae blooms can appear rapidly and their formation conditions are not always predictable, involving both natural factors and those affecting water quality.
'Clear on-site signage, alongside the Bloomin’ Algae app and other online resources, helps people make informed decisions about using the water safely,' Cheslett-Davey stated.
Reports of toxic blue-green algae have been noted in waterways across the UK, including nearly 250 cases in Northern Ireland, as well as in Scotland and various English regions from Lancashire to Hampshire. A recent incident in an Essex lake resulted in the deaths of waterfowl and fish, prompting criticism regarding the response from local authorities.
