Abstract: In this study, observations were carried out in the surface waters of Lasara Dhanola drain of Punjab within to determine water quality. The basic physicochemical variables were used to determine water quality. Taking into account the World Health Organization's drinking water standards and the water quality index (WQI) were used in determining the water quality. In addition, irrigation water quality was examined. Some of the water quality parameters exceed the recommended limit values in all at all sites. According to these values, the Lasara Dhanola drain water belongs to the 'very poor' class in terms of irrigation water quality. According to results of factor analysis, pH, temperature, electrical conductivity, suspended solid matter, biological oxygen demand, total hardness, total alkalinity, calcium, nitrate, chlorides, fluorides and dissolved oxygen are the main variables responsible for the processes in the ecosystem