Detection of Total bacteria, Coliform and E. coli in Drinking Water Factories of Pakse City and three District (Beaching Chaleunsouk, Sanasomboun and Phonthong) of Champasack Province

The quality of drinking water has an important role in human infection and disease. The objectives of this study were to determine the microbiological ...

Abstract

The quality of drinking water has an important role in human infection and disease. The objectives of this study were to determine the microbiological analyses for quality of drinking water sample in drinking water factories in Pakse City and three districts of Champasack Province to match the results with the standard level of the Ministry of Health, Food and Drug Administration (Lao PDR) and international standards for drinking water quality.  A total of 30 water samples were taken monthly from different the drinking water factories in Pakse City and three districts and were taken over 5 months, from October 2017 to February 2018. The water samples were sent to analysis in Central laboratory (CL) Champasack University Which the microbiological analysis was performed following standards the aerobic plate count (APC) or Spread plate technique and Most probable number (MPN) technique for coliforms and E. coli. The microbiological analyses had shown in 30 water samples were contaminated with total bacteria between < 2.5-38.0 x 10² CFU/ml, coliform bacteria contamination were <1.1-3.7 MPN/100 ml and E. coli were 1.1-2.2 MPN/100 ml. However, when the water quality compared with standard quality of drinking water which result was also compared to Lao standard and WHO guidelines, it found that 16 samples (53.34%) has reached the microbiology standard criteria (Total bacteria), 24 samples (91.66%) have reached the microbiology standard criteria (Coliform bacteria contamination) and 24 samples (91.66%) have reached the microbiology standard criteria (E. coli contamination).