NAVIGATING THE TRIPLE THREAT: INSTITUTIONAL POLYCENTRICITY AND CIRCULAR URBAN METABOLISM FOR WASTE-POLLUTION DECOUPLING IN LAGOS STATE, NIGERIA, 2000-2026

Abstract

Lagos State hosts over 24 million residents and generates approximately 13,000 tonnes of municipal solid waste daily. Formal collection covers only 40% of generated waste. The remaining 60% contributes to air, water, and soil pollution, creating a self-reinforcing cycle of urbanization, poor waste management, and environmental degradation. This study examines how Lagos State can manage urbanization, waste, and pollution to achieve environmental sustainability. The central research question is: To what extent can polycentric governance and circular urban metabolism decouple urban growth from environmental pollution in Lagos? A qualitative desk review supplemented by secondary quantitative analysis was adopted. The study is anchored on Ecological Modernization Theory, Urban Metabolism Analysis, and Polycentric Governance Theory. Secondary data from 2000-2026 were synthesized from Lagos Waste Management Authority (LAWMA) reports, National Bureau of Statistics, WHO, World Bank, and 45 peer-reviewed articles. Data were analyzed through waste flow analysis, governance indexing across 20 Local Government Areas (LGAs), and thematic coding. Findings show waste generation increased by 220% since 2010 while collection capacity grew by 45%, creating a deficit of 7,800 tonnes per day. Sixty-seven percent of Lagos waterways exceed WHO limits for biochemical oxygen demand (BOD) and heavy metals. Governance fragmentation involving five state ministries and 57 LGAs/LCDAs weakens enforcement. Pearson correlation between governance effectiveness and BOD is r = -0.84, p < 0.001. The informal sector recycles 60% of materials but remains excluded from formal policy. The study concludes that technology-driven solutions alone fail without institutional coordination. It proposes a Modernized Urban Metabolism framework and recommends a Lagos Circular Economy Act, 10 circular hubs at 5km intervals, and formalization of waste pickers.