The involvement of the communities is a key-strategy to enable fast responses both case of emergency and environmental protection. On this goal geospatial system could allow to collect information directly from the citizens. More specifically they can act on “feedback-loops” between “communities”, “decision-makers” and “environment” catalysing participation and the perception of local knowledge. The work will present the case study of “la Cuicadora” project, a Ushaidi based crowdmapping system provides an information sharing network to assist Peruvian indigenous communities in better protecting themselves from contaminated water sources. The analysis offers the chance to understand the concept of Community Information Systems (CIS) and its role in the involvement of communities in environmental protection.