Over the last 75 years, Puerto Rico transformed from an agricultural economy to anindustrialized economy and now faces economic stagnation. These transitions have directimplications for Puerto Rico’s environment, water resources, and the health of its population.The island of Puerto Rico is 8,700 square kilometers, made up of 78 municipios (municipalities)with a population of 3,548,397 people, and rapidly declining.1,2 Puerto Rico’s geography andgeology present a diverse set of challenges to meet the water demands of its people and ensuresafe and sustainable water supply.