Chemical analyzes assess nitrate pollution in an intensively exploited aquifer under arid climate conditions.

Stable isotopes highlight the processes of irrigation water return, evaporation and recharge.

Complexity of the aquifer system path flows attributable to the intensive exploitation and origin of groundwater.

Good groundwater quality to agricultural activity in areas with dominance of fruits and vegetables greenhouses, adoption of drip irrigation and fertigation.

Gradual decline of groundwater level during last decade manifested mainly in irrigated areas resulting from intensive exploitation.