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The topic will be about “water pollution in the U.S”Publications J. Sci. Res. 8 (3), 413-425 (2016)Surface Water Pollution around Dhaka Export Processing Zone and ItsImpacts on Surrounding Aquatic EnvironmentM. S. Islam?1,2, A. Sultana 1,2, M. S. Sultana 2, M. Shammi 2, M. K. Uddin 21Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research 1University ofToyama, Gofuku 3190, Toyama 930–8555, Japan2Department of Environmental Sciences, Jahangirnagar University, Dhaka-1342, BangladeshReceived 21 May 2016, accepted in final revised form 3 July 2016AbstractThis study based on the physicochemical parameters was conducted to determine the pollution status in the aquatic environmentof Dhaka Export Processing Zone (DEPZ) area. A total of 5 water samples were collected on the basis of their distance from theeffluent outlet and were examined. Physicochemical parameters like color, temperature, pH, electric conductivity (EC), totaldissolved solid (TDS), total suspended solid (TSS), total hardness, total alkalinity, dissolved oxygen (DO), biochemical oxygendemand (BOD) and chemical oxygen demand (COD) were measured via standard determination method. Physicochemicalanalyses revealed that most of the water quality parameters exceeded the recommended levels set by the Department ofEnvironment (DoE), Bangladesh. The concentrations were found decreasing with increasing distance from the effluent outlet. Avery strong positive correlation was found between BOD and COD in all sampling points. Both BOD and COD values had astrong negative correlation with dissolved oxygen (DO). The results indicated that the surrounding aquatic environment isexceedingly contaminated by various pollutants released from DEPZ which is highly vulnerable for the species on thatecosystem.Keywords: Industrial effluents; Surface water quality; DEPZ Industrial area; Water pollution; ETP.© 2016 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. doi: http://dx.doi.org/10.3329/jsr.v8i3.27819 J. Sci.Res. 8 (3), 413-425 (2016)1. IntroductionThe surface water quality of a region is determined by the local topography, hydrology and hydrogeology in thecatchment area, along with climatic factors and anthropogenic influences [1,2]. Surface water has the highestsusceptibility to pollution because of waste and wastewater accessibility [3]. In most of the cases, the rivers are themain choices to hold and bear the responsibility of pollutants, especially in the developing countries [4]. In??Corresponding author: sisumon2009@gmail.com414 Surface Water Pollutionrecent years, the river systems in Bangladesh have become more polluted as a consequence of rapid populationgrowth, uncontrolled development on the riverbanks, urbanization, unplanned industrialization and agriculturaloperations [5]. Industries are prime polluters because they utilize a huge amount of water and release untreatedwastewater throughout the production cycle of a product. Newly booming processing industries such as tanneries,steel plants, battery producers, engineering and textiles also contribute to this problem [5]. The careless disposal ofuntreated wastewater and solid waste to the water system significantly contributes to the poor quality of the water.The polluted water becomes a threat to public health, livestock, wildlife, fish and other biodiversity. Thesepollutants have potential to retard the growth and aquatic flora and fauna [6].

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