Hydrogeology. Areas vulnerable to pollution by agricultural nitrates (2013)

Demarcation of zones vulnerable to nitrate pollution in the Autonomous Community of Navarre. According to the Regional Order that regulates it, three zones are established and zone 1 is excluded as a vulnerable zone: Alluvial of the Ebro in Mendavia. The declared areas are: Zone 2: Alluvial of the Ebro between Tudela and AlagónZona; Zone 3: Alluvial del Cidacos between Tafalla and Murillo el Cuende and zone 4: River Robo from its source to its mouth in the river Arga.