Analisis COD (Chemical Oxygen Demand) pada Kualitas Air Sungai Krueng Tamiang di Kabupaten Aceh Tamiang

Abstract

ABSTRACT Tamiang Krueng River is a large river that divides the two cities of Kuala Simpang, Aceh Tamiang. The flow of water entering the estuaries of Krueng Tamiang indicate contain contaminants. This happens because there is a river that runs along the factory or industrial activity in households, markets and hospitals that operate and dispose of waste into the river. This study aims to determine the water quality conditions and differences in levels of COD (Chemical Oxygen Demand) in Krueng Tamiang river. This study was taken from the data results of Bapedal Aceh laboratory in 2013. Water quality parameters studied were COD (Chemical Oxygen Demand). This study was conducted in seven points with five repetitions locations along the watershed. In accordance with the Indonesian republic regulation no. 82 In 2001, the quality standards used are class II, 25 mg / l. From the analysis using one-way analysis of variance in completely randomized design showed that the α = 1% then the F count <F table {0,01 (6,28)} or 1.169 <3.53 so that the river water is still good condition. Because there is no real difference then continued with Bartlett test analysis in order to obtain b = b (0:01; 5) or 0.5207 <0.9816. This means that the data has the same variance homogeneity. Keyword : analysis of variance, bartlett test, cod