Pollution Charges and Assimilation Capacity in Tanjungpinang Bay Area,Riau Islands Province,Indonesia

The Tanjungpinang bay at Riau Islands Province is one of coastal areas that have a high level pollution load due to the increased scale of economic activities and also rapid community activities are increased dynamically. Hence carrying out a research which aim for knowing the pollution load and the assimilation capacity determination in Tanjungpinang bay area have a very strategic position. This study is based on survey method through the observation techniques in the field for distinguishing variables with the parameters set by purposive sampling. The data were analyzed to produce the charts which describe the relationship between each parameter with the total pollution load in estuaries. The results explain the pollution load into the Tanjungpinang bay area which includes parameters of TSS, BOD₅, COD, NO₃, NO₂, NH₄ and PO₄-P respectively amounted to 397.369 tons/year, 20.858 tons/year, 791 079 tons/year, 1.156 tons/year, 824 tons/year, 1.115 tons/year and 606 tons/year. While the Tanjungpinang bay area assimilation capacity for each parameter above amounted to 689 960 tons/year, 67.062 tons/year, 640.930 tons/year, –89 tones/year, –9 tons/year, 1.145 tons/year and –12 tons/year. This shows that the pollution load to the parameters COD, NO₃, NO₂ and PO₄-P has exceeded the carrying capacity of the waters.