WATER QUALITY ANALYSIS OF CODE RIVER BASED ON METAL AND NONMETAL PARAMETERS USING HEAVY METAL POLLUTION INDEX

Code is one of the rivers influenced by a large number waste-generating human activities in Yogyakarta, Indonesia. Despite continued discharges pollution loads from anthropogenic waste, heavy metal index (HPI)—a water quality assessing ions present body water—remains nationally underutilized. The research was intended to 1) analyze river based on and nonmetal parameters typical domestic 2) calculate HPI using either both parameters, 3) evaluate resultant status. data were products temporal monitoring conducted Forestry Environmental Office for Yogyakarta. included Fe, Cu, Cd, Cr, Pb, while BOD, COD, TSS, ammonia, oil grease, total coliforms. Each parameter value compared with standard issued Governor Regulation No. 20/2008. results showed that composite classified as excellent (2.52), whereas representing indicated bad (55.04). Nevertheless, composed all fell into category (3.94). Consequently, when are combined calculation, shows better status.Keywords: (Heavy Metal Pollution Index) quality, metal, Yogyakarta