The advances in the way to sustainability are inseparables to the achievement in the citizenship construction, because the citizen condition is only realized in the proactive compromise with the territorial themes. The environmental management effectiveness requests high quality in their participative processes; therefore, pertinent tools are required to know and to appraise these processes. The goodness of these tools proceeds of their functionality in the knowledge of the participation quality purpose, that to environmental participative processes, is conceived in terms of legitimacy, representativity, democratization of the environmental knowledge, social cohesion, capacity of interlocution, and incidence in the decision making. With the coherent conceptual structure of these facets shapes the theoretical-methodological scaffolding that permits their joining in attributes, variables and indicators relatives to the characteristics of the participative planification processes, propers to account of the environmental participation quality. With the appraisal of the environmental participation quality in planification processes, supported in the integration of the constitutive attributes, is possible to obtain the index that facilitates their diagnostic and improvement.