The Azzaba plain located north-east of Algeria is a plain of primary economic importance. In fact, we find a large surface area of agricultural land therein, whose activity requests huge quantities of water to meet the needs of various cultures. Water intended to agriculture should have physicochemical characteristics tolerable by crops, even under wet climate, the resort to irrigation is necessary for most cultures. The lack of surface water causes for groundwater to be increasingly exploited. A hydrochemical study was conducted; it focused on major elements of groundwater of the plain. Two sampling campaigns were carried out during the periods of high and low waters (April and October 2018). The findings of the study show that groundwater is very mineralised and characterised by average to high salinity, so it is of permissible to poor quality for agriculture.
