Abstract
A study has been conducted to identify the incoming pollutants and assess the water quality in Grogol River, DKI Jakarta, Indonesia, which has a length of 13.35 km and consists of two segments. The water quality assessment is determined by pollution index method, referring to Minister of Environment Decree No. 15/2013 on The Guidelines of Water Quality Status. The samples were taken both in rainy and dry seasons at 7 sampling points. Based on the analyses of 10 key parameters and the calculation of pollution index value, it can be concluded that Grogol River is low polluted in rainy season and moderate polluted in dry season. The information obtained from this research can be used for decision making to improve the water quality of Grogol River.
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