The Hazar Lake, that is Southeast 22 km. of Elazığ city, has an important tourism potential. In this study; the physical, chemical and bacteriological analysis which were made by DSİ for 4 years by evident periods for Hazar Lake were dealt with in detail for water pollution. The continental water sources were classified according to quality criteriors of lake water had the characteristics of I. and II. category waters. But it was determined that control limit values of eutrophication were exceeded. in addition precautions were offered for preventing lake pollution.