Bacteriological and chemical study of the drinking water in Indonesia.

We carried out the examination of drinking water in Indonesia for past 13 years. The present paper reports the resutls of bacteriological and potassium permanganate consumed test conducted from July to August in 1980.Bacteriological examination revealed that Klebsiella pneumoniae was isolated most frequently from the drinking water in Indonesia, and Acinetobacter calcoaceticus, Aeromonas hydrophila, Pseudomonas sp. and Pseudomonas aeruginosa were found next to it. Klebsiella penumoniae and Acinetobacter calcoaceticus were found most frequently from drinking water in Java, while Aeromonas hydrophila was isolated most often in Kalimantan and Sumatra. From the samples of the tap water, Acinetobacter calcoaceticus and Hafnia alvei were found most frequently, while from the well water, Klebsiella pneumoniae, Acinetobacter calcoaceticus and Aeromonas hydrophila, and from rain water, Acinetobacter calcoaceticus and Chromobacterium violaceum were respectively found.From the results of the potassium permanganate consumed test, 62% of the drinking water from Java were shown positive in this test, while 90% from Kalimantan, 100% from Sumatra as well as Sulawasi were proved positive respectively. The correlation between isolated bacteria and results of potassium permanganate consumed test was following; All the drinking water, in which such bacteria as Escherichia coli, Edwardsiella tarda, Enterobacter aerogenes were found, showed positive also in potassium permanganate consumed test, while only 33% of the drinking water contained Hafnia alvei was proved positive in this test.