Recently, surface water of the Dong Nai river basin has been influenced by socio-economic development activities, so river water quality is reduced. The author used a number of methods such as collecting data, processing data, analyzing systems, and chart - map to assess water quality in the Dong Nai river basin based on the analysis of the measured values of 4 parameters as pH, BOD5, COD, DO, compared with QCVN 2015 for river water quality for 5 consecutive years from 2011 to 2015 with 12 monitoring points representing upper, middle and lower river. The research results show that the water quality of the Dong Nai river basin has a clear differentiation between the monitoring points along the upper, middle and lower of the river. The further lower of the river basin, the pollution level increases. The paper also analyzes the causes of socio-economic development and the fluctuation of water quality in the Dong Nai river basin in the context of promoting growth. | Water quality assessment of Dong Nai river basin
