Control of nitrogen fertilizer pollution in groundwater

Intensive and unseasonable nitrogen fertilization leads to high nitrate con centrations in ground-water. Recently groundwater sampling was being perfor med by pumping from existing standard wells. This traditional technique off ers vertically mixed samples. Level-determined samples of ground water are increasingly important for hydrological studies and nitrate pollution probl ems. Ground water samples were collected from shallow boreholes located mai nly in the coastal area in the southwestern part of Chalkidiki Peninsula in Northern Greece. Few of the samples have been collected by an innovative s ystem for ground water sampling and monitoring called "BAT system". Finally statistical analysis for the major nitrate data are given.