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Abstract Water quality in Batanghari River has decreased due to changes in land use. One of the changes in land use is the existence of Unlicensed Gold Mining (PETI) in the upper part of the river. The test results of the Environmental Laboratory of the Environmental Office of Jambi Province showed that the upper and downstream of the Batang Asai River contained 0.003 mg / l of mercury and the Batang Limun River has 0.005 mg / l ini its upperstream and 0.004 mg / l in its downstream. The purpose of this study was to determine the effect of unlicensed gold mining on the spatial quality of the Batanghari watershed. This research approach uses the Principal Component Analysis (PCA) model through remote sensing techniques and Geographic Information Systems. The results of this study are expected to obtain a database of changes in the quality of Batanghari River water due to spatial-based gold mining activities which form the basis for the utilization of Batanghari river water as raw water for drinking water.