Northern Ireland's water systems are currently experiencing 248 blue-green algae blooms, according to the UK Centre for Ecology and Hydrology. Eighty of these blooms have been confirmed in June and July alone.
The toxic bacteria, which can cause skin irritation and sickness, has led to warnings and closures at several locations. Camlough Lake near Newry and Craigavon Lakes are among the affected areas, with warnings issued by the Department of Agriculture, Environment and Rural Affairs (Daera).
Local businesses have reported a sharp decline in visitor numbers since warnings were issued. Karl Toner, who operates a coffee cart, glamping site, and paddleboard hire business at Camlough Lake, noted a significant drop in trade. Similarly, watersports and open-water swimming at Craigavon Lakes were suspended on 21 July due to the algae.
Newry, Mourne and Down District Council and Armagh City, Banbridge and Craigavon Borough Council are monitoring the situation and have erected warning signs. Daera stated that restoring the ecological health of water bodies requires respecting science and supporting difficult decisions, acknowledging there are no quick fixes.