This research delves into a combined system that generates friendly hydrogen from processed sewage using energy from offshore wind farms. Through this setup, the system produced 5 kg of hydrogen per hour with a 70% efficiency in electrolysis. It also significantly decreased the need for freshwater by 80% thanks to reusing treated wastewater. This innovative approach of combining wastewater treatment with energy tackles water scarcity and aids in achieving the UKs goal of net zero emissions. The system managed to cut carbon emissions by 100% in contrast to the conventional natural gas-driven hydrogen production process; it also saved around 15,000 L of fresh water every month. Moreover, the cost of producing hydrogen was determined to be £3.80 per kilogram—16% more economical than standard techniques—underscoring the economic advantages for broad adoption in industry sectors. Nonetheless, the system faced some hurdles, such as performance caused by fluctuating wind energy and the need for regular membrane maintenance. The work should concentrate on effectively blending energy storage options to lessen renewable energy fluctuations and broadening the setup to include solar or tidal power for increased stability throughout the year. The results propose that this adaptable and economical arrangement can notably cut down carbon emissions and water usage by providing an answer for making sectors such as heavy industry and transportation more environmentally friendly. Those in charge of setting policies and players in the industry are urged to endorse this technology to speed up the move towards eco-energy systems that bring both environmental advantages and economic gains.