Analysis of solid oxygen distribution in kakap river, kubu raya district west kalimantan

Abstract

Abstract The people of the Kakap River area live and open businesses along the river while they directly dispose of waste into the river. The people also use the river as a source of clean water to meet their daily needs. The purpose of this study was to determine the condition of the Kakap River water quality against dissolved oxygen with BOD, COD, pH, and DO parameters. This research used purposive sampling, starting from determining the sample point to be selected. The sample points used were three locations along the Kakap River. The results of the water quality analysis of the Kakap River from the first location in the estuary: COD parameter is 5.0 mg/L, the BOD parameter is <1 mg/L, DO parameter is 5.6 mg/L and pH parameter is 6.65. The second point of Pal 9 location: COD is 41 mg/L, the BOD parameter is 13 mg/L, the DO parameter is 4.9 mg/L, and the pH parameter is 7.17. The third location at Punggur Kecil: COD parameter is 210 mg/L, the BOD parameter is 137 mg/L, the DO parameter is 3.9 mg/L, and the pH parameter is 4.86 in the low tide conditions. These results will meet the water quality standards for class IV according to PP RI No. 82 of 2001, in which it can only be utilized for irrigating crops and other uses that require the same water quality. Apart from that, the results indicate that the water quality condition of the Kakap River has been polluted so it is not appropriate for the people to use the river as a clean water source.