The research dealt with assessing the quality of groundwater and analyzing its suitability for various uses (human, industrial and agricultural) in Rabia district, located in the northwestern parts of Nineveh Governorate, The research adopted the main classifications in the proposed limits in classifying the quality of groundwater and its suitability for the three uses - the World Health Organization (WHO) for drinking - the Wollcox equation and scheme for agricultural use - the proposed limits for water uses in some industrial purposes, The research came to the conclusion that the wells were not suitable for drinking, although the wells vary in the degree of unsuitability, and the wells vary in the degree of suitability for agricultural uses (4 wells are either of good to permissible validity, 3 wells allowed to questionable, one excellent well to good and one questionable well), In the industrial field, the wells were shown to be unsuitable for various industrial purposes despite the appropriateness of the acidity degree (PH) towards that and (Cu) in one well (Karan).