Goyenaga-Soto, A. and Vargas-Meneses, C. 2026. Hydrogeological connectivity and microbiological contamination by Escherichia coli: A GIS application in the Santa Marta Micro-Watershed, Tarrazú, Costa Rica. UNED Research Journal. 18, 1 (Apr. 2026), e6179. DOI:https://doi.org/10.22458/urj.v18i1.6179.