A Study of Water Quality in the Saline Soil Watershed of Northeastern Region   Aroon Pongkanjana and Manu Srikhajon   ABSTRACT         A study of water quality in the saline soil watershed of northeastern region during 1992 to 1993 from 15 watersheds. The results are presented as follow:       The salinity level of farm pond are between low to medium. The salinity level of stream flow are between low to medium and the ground water's salinity are between low to high.         Keywords : Water quality