Lough Neagh’s third consecutive year of toxic algae blooms, fueled by pollution and climate change, threatens water safety and local economies.

Lough Neagh, the largest lake in the UK and Ireland, is facing a worsening algae bloom crisis for the third consecutive year, driven by pollution from agriculture, industry, and sewage, along with climate change. Toxic blue-green algae, visible from space and smelling like rotten eggs, have harmed fishing, watersports, and local businesses, while raising concerns about drinking water safety. Invasive zebra mussels are worsening the problem by boosting algal growth. Despite a government action plan launched last year, progress has been slow, with many measures delayed until 2026 or later, increasing pressure for stronger environmental protections and faster action.