South Korea Launches Seasonal Algae Control System

Why this is here: Last year, South Korea issued algae bloom alerts for a record 961 days—the highest number recorded in the country’s history.

The South Korean government will implement a seasonal algae control system from May 15 to October 15, 2026. This initiative addresses recurring algae blooms worsened by climate change, which last year reached a record 961 alert days nationwide. The government shifts from responding to blooms to preventing them by controlling nutrient sources.

The new system focuses on three areas: managing discharge sources, improving monitoring, and emergency responses. Before the monsoon season, officials plan to distribute slow-release fertilizers and install water gates in agricultural areas. They will also increase inspections of stockpiled compost and continue converting manure into solid fuel or biogas.

Korea expands algae prediction sites from nine to thirteen locations. They also introduce AI-powered microscopes to reduce analysis time from four to one hour.

Real-time monitoring will use satellites and hyperspectral towers. The government acknowledges the need to coordinate with local communities and farmers before opening the eight Nakdong River dams to improve water flow and remove algae, while monitoring groundwater levels.