Public health teams have issued an urgent warning to dog owners and wild swimmers to stay completely out of the water at high-footfall fells river sections. Sampling tests have confirmed that a recent block of hot, stagnant weather has triggered accelerated growth of dangerous blue-green algae. Park rangers are actively erecting emergency advisory signs at popular spots, warning that ingesting even a fraction of the scummy water can cause severe, rapid illness in children and can be fatal to family pets.
Environmentalists Sound Alarm as Severe Algae Outbreaks Threaten Dales Rivers
08 June 2026
Public safety warnings are active across popular Dales waterways today after the Environment Agency confirmed hazardous toxic algae blooms are expanding rapidly