Research on water quality analysis of physicochemical parameters, different water quality indices, water pollution monitoring etc. of different water bodies was conducted earlier; but recently, water pollution and its effects assessment with WQI model and Statistical tools such as: correlation and regression related research takes significant role for futuristic and detail analysis. This research deals with Water Quality Index and Correlation Analysis on water quality parameter of Turag River adjacent to Tongi industrial area; some selected physicochemical parameters (like as: pH, EC, TDS, TSS, DO, BOD5, and COD) are investigated herein. To know the state of Turag river water quality parameters, water samples were collected from four (04) sites near Tongi industrial area; in order to get the temporal changes, during both wet (October, 2023) and dry (March, 2024) season, 04 water samples were collected accordingly from 04 locations. After samples collection, it was measured, experimented in laboratory and analyzed to ascertain the water quality condition with WQI and correlation matrix through statistical analysis based on tested results of mentioned parameters. The results revealed almost every data of wet season are within standard level of DoE (ECR, 1997). But, During dry season, the values (EC, DO, BOD and COD) near Ultra Washing and Dyeing Ltd and (TSS, DO, BOD and COD) values near Zarina Composite Textile Industries Ltd. are not within the acceptable limit respectively; near Tongi Bridge and near Sajid Washing & Dyeing Ltd. the DO values are bellow the acceptable limit according to Inland Surface Water Standard values of DoE (ECR, 1997).The present study shows that, the WQI of o4 stations are within the range of (76-100) in dry season; which indicates water quality is Very Bad and in wet season, all station’s data are comparatively low and within the range of (51-75) which is indicating Bad water quality. The finding reported herein the concentration of DO is alarmingly low in the Turag River in dry season. Results also showed that, concentration of EC, TSS, BOD and COD are high dry season. According to WQI scale, in dry season the water quality of Turag river is comparatively very bad than wet season. To minimize the water pollution, it is required to take immediate steps from concern bodies.