Factor analysis is applied on the 19 parameters to investigate the origin of the water pollution sources. Multivariate analysis showed the existence of up to four significant factors which account for 77.0 % of the total variance of hydrochemistry data. The first two factors can be initially assigned to mineralization, mining and salinity due to saltwater intrusion whereas the others originate as a result of industrial wastes, domestic wastes and wastes from agriculture activities. This work will provide policy makers and land use managers with knowledge of precise groundwater quality problems affecting the aquifer. It is recommended that concerned authorities should take the necessary actions to control the pollution sources of groundwater such as human activities, agricultural activities, and other industrial units.Index Terms-Groundwater quality, multivariate analysis, nile delta aquifer, factor analysis.