The HOOP Network of Cities and Regions seeks to facilitate the exchange of knowledge and mutual learning among cities and regions willing to recover valuable resources from urban bio-waste and wastewater to make bio-based products. By joining the network, they gain information on innovative urban bioeconomy solutions and engage in activities relevant to their specific situation and interests. Participants have direct exchanges with the eight HOOP lighthouse cities and regions, sharing experiences and expertise, and can be invited to the project's events.

The HOOP network is only open to organisations that plan, organise or operate municipal waste management or wastewater treatment activities, for instance local or regional authorities and waste management companies.