Innovation in small municipalities: The case of waste management

Small municipalities are key to reducing waste and tackling climate change, but they often struggle to innovate and improve their capacity to deliver public services, especially in developing countries. This article explores how small municipalities can innovate in public service provision despite limited resources. Specifically, we analyzed municipal solid waste management (MSWM), a service typically overseen by municipalities and essential for reducing greenhouse gas (GHG) emissions. The study is based on a single case: Harmonia, a small Brazilian municipality selected for its exceptional waste recovery performance – the highest in the country – alongside composting and prevention initiatives. Following an economic and environmental assessment of MSWM effectiveness, including GHG emissions, the Multi-Level Perspective (MLP) was applied to analyze the political, social, and institutional factors that enabled innovation in Harmonia's MSWM system. Findings suggest that successful innovation in small municipalities tends to rely on small-scale initiatives that require neither advanced technologies nor major investments. However, this depends on long-term support from a landscape of actors and public policies to scale up and coordinate efforts across departments, overcoming resource limitations. In Harmonia, the effectiveness of prevention actions, home composting, and recycling was rooted in decades of environmental education, social engagement, public awareness, and collaboration with other levels of government. These technological and management efforts led to costs (US$24.40 per inhabitant/year) and emissions (37.02 kg CO 2 eq per inhabitant) significantly below the national average (US$35.70 and 396.83 kg CO 2 eq per inhabitant, respectively). • Small municipalities often struggle to build capacities to deliver public services. • Small municipalities can build capabilities for innovation in MSW management. • Environmental education and local intersectoral management are key factors. • The municipality under study reuses 55 % of the MSW and practices home composting. • Investment in environmental education reduces operational costs and GHG emissions.