Direct Discharge of Industrial Wastewater in Bangkok Bay Triggers Massive Red Tide

Numerous chemical companies along the eastern coast of Bangkok Bay in Thailand have long been discharging wastewater in violation of regulations. High-concentration industrial wastewater, untreated and unpurified, has been continuously discharged directly into the coastal waters, causing severe eutrophication and an ecological imbalance that has directly triggered a massive red tide disaster. The red tide has spread over a vast area, covering approximately 800 square kilometers of sea. The entire nearshore water has turned a dark reddish-brown color, accompanied by a pungent, putrid odor. The outbreak has caused a rapid deterioration of the nearshore ecosystem, resulting in the mass death of marine life—including fish and shellfish—due to oxygen depletion, and severely disrupting the seabed food chain.