State of marine environment in the East Asian Seas Region: UNEP Regional Seas Reports and Studies No. 126

This report provides a periodic assessment of the marine environment within the East Asian Seas region, encompassing coastal waters of the Association of Southeast Asian Nations and Hong Kong. The document aims to establish a foundational perspective on regional marine ecosystem health and contamination trends to assist national and international decision-makers in formulating management strategies. Relying on scientific literature, reports, and monitoring data, the assessment characterizes the region’s geography, oceanography, and significant human pressures, including waste disposal, coastal development, and marine transport. Key findings indicate that while some localized improvements have occurred through environmental regulations, mounting population pressures and industrial activities continue to affect marine water quality and habitats. The report underscores the necessity for sustained regional cooperation and environmental management.