Costa Rica is recognized for its efforts in sustainable development. This study analyzes the challenges of environmental sanitation to articulate environmental management in the Canton of Heredia. Currently, the country faces significant challenges regarding access to water and environmental sanitation. This research contributes to the analysis of the challenges of the environmental sanitation system in this territory. The testing techniques and photographic registration in the impact area, along with the interviews with employees and professionals on the subject, and extensive bibliographic consultation support this methodology. The study's conclusions regarding the challenges of environmental sanitation are 1) legal and institutional framework faced by the environmental sanitation project of the Publics Services Company of Heredia (ESPH for its initials in Spanish), 2) strategy for the treatment of sanitary waters in the canton, and 3) improvement in the quality of life of the Heredia's citizens.