The study aims to explore the feasibility of synthesizing hydrogen from sewage sludge in EU countries, with a particular focus on assessing associated emission factors. This research is driven by the increasing interest in utilizing wastewater as a valuable resource for clean energy production in the context of the global energy transition. Despite the need for extensive treatment of the resulting sludge, research efforts are focused on the production of clean energy, particularly hydrogen. The research methodology uses statistical approaches to derive potential values from baseline data through emission factors and categorizes study areas based on this information. Europe produces approximately 10 million tons of sewage sludge annually, with Hungary contributing nearly a quarter of a million tons, hence this significant byproduct should be treated as a valuable resource in accordance with the principles of a circular economy. The paper delves into hydrogen generation from sewage sludge, specifically through anaerobic digestion, and thoroughly reviews and contrasts existing systems, examining key factors and prospects influencing hydrogen production efficacy within the EU context. Overall, this study addresses a topic of growing significance, offering insights beneficial for both policy formulation and practice in the spheres of energy management and environmental conservation, with a special emphasis on its application and implications for European Union countries.