The Guarani Aquifer, situated under parts of Brazil, Uruguay, Paraguay, and Argentina, has a total surface area of approximately 500,000 square miles [1.2 million km2] and holds an estimated 10,000 cubic miles [40,000 km] of water.
Brasiilia, Uruguay, Paraguay ja Argentina all paikneva Guarani põhjaveekihi pindala on ligikaudu 1,2 miljonit ruutkilomeetrit ja sisaldab arvestuste kohaselt 40 000 kuupkilomeetrit vett.