Nitrate Contamination and Temporal Trends in Volcanic Barva and Colima Aquifers (1988-2018), in an urban and agriculture-dominated region, Costa Rica

Abstract

In the Great Metropolitan Area (GAM) of Costa Rica, 65% of the population, equivalent to 1.7 million people, is supplied by the most important volcanic aquifers in the country: Barva, phreatic and the most superficial, Colima Superior, and Colima Inferior, both phreatic in some sectors and confined in others.En la Gran Área Metropolitana (GAM) de Costa Rica, el 65% de la población, equivalente a 1,7 millones de personas, se abastece de los acuíferos volcánicos más importantes del país: Barva, freático y el más superficial, Colima Superior, y Colima Inferior. , tanto freático en algunos sectores como confinado en otros.