Abstract: Unscientific disposal of municipal solid wastes from different sources pollutes the environment. The present paper tries to find out the pollution level of surface water of river Nambul and surface water quality at the very vicinity of the disposal site at Lamphelpat. River Nambul is one of the important rivers passing through the heart of the Imphal municipality. Three sampling sites have been taken along this river one at the entrance of the municipality (upstream), at the middle and the other at the outgoing of the municipality (downstream). The fourth site is near the solid waste disposal site. The parameters taken for the analysis using the standard methods are air temperature, water temperature, transparency, conductivity, pH, TDS, alkalinity, hardness, calcium, magnesium, chloride, dissolved oxygen and BOD. The study has been carried out on monthly basis during April, 2010 to March, 2012.