Blue-green algae blooms prompt beach closures and warnings in UK waters

Local health officials have banned swimming at two popular coastal beaches after water quality monitoring revealed high concentrations of harmful blue‑green algae (cyanobacteria). The closures aim to protect the public from toxins that can cause skin irritation, nausea, and neurological symptoms. Beaches will remain closed until laboratory tests confirm toxin levels are below safety thresholds for two consecutive sampling periods.

The Shetland Islands Council’s Environmental Health Team reported the presence of blue‑green algae in Spiggie Loch, posting warnings to deter contact with the algal scum. Landowners and NHS Shetland have been advised of the precautionary measures. While the bloom does not currently affect water supplies, authorities note that exposure can cause rashes, eye irritation, vomiting, and in severe cases, fatal poisoning of pets.

Both incidents illustrate the ongoing monitoring efforts by environmental and health agencies to manage cyanobacterial blooms that thrive in warm, nutrient‑rich waters and pose health risks to humans and animals.