Agricultural pollution CyL: groundwater nitrates

Diffuse agricultural pollution in Castile-Leon: groundwater nitrates. Map of nitrate pollution of agricultural origin in groundwater in Castilla y León. Cartographic representation of municipal incidence due to the presence of nitrates in groundwater in Castilla y León. Analytical values of nitrate concentration detected since 2006, by municipalities, according to maximum concentration in milligrams per liter (mg/l).