African Journal of
Environmental Science and Technology

  • Abbreviation: Afr. J. Environ. Sci. Technol.
  • Language: English
  • ISSN: 1996-0786
  • DOI: 10.5897/AJEST
  • Start Year: 2007
  • Published Articles: 1071

Full Length Research Paper

Assessment of microbiological quality of drinking water treated with chlorine in the Gwalior city of Madhya Pradesh, India

Makhmoor Rather Ahmad
  • Makhmoor Rather Ahmad
  • Indira Gandhi Academy of Environmental Education Research and Ecoplanning, Jiwaji University Gwalior, Madhya Pradesh, 474011, India
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Ahanger Faroz Ahmad
  • Ahanger Faroz Ahmad
  • Department of Environmental Sciences/Centre of Research for Development, University of Kashmir, Srinagar, Jammu and Kashmir, 190006, India
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Sharma Harendra K
  • Sharma Harendra K
  • Indira Gandhi Academy of Environmental Education Research and Ecoplanning, Jiwaji University Gwalior, Madhya Pradesh, 474011, India
  • Google Scholar


  •  Received: 13 February 2015
  •  Accepted: 23 March 2015
  •  Published: 20 May 2015

Abstract

The quality of drinking water at the point of delivery to the consumer is crucial in safeguarding consumer’s health. The current study was undertaken to assess the changes in residual chlorine content with distance in water distribution system in Gwalior city of Madhya Pradesh and assess its relation with the occurrence of total and faecal coliforms. Water samples were collected from the exit point of the treatment plant and taps at consumer households at an interval of 1 to 2 km. A total of 56 water samples were tested to determine residual chlorine content and presence of total and fecal coliforms using standard methods. Average concentrations of residual chlorine from all sampling location were between 0.08 to 0.98 mg/L. Total coliform was found at most of the sampling locations in the range of 0.82 to 7.15 MPN/100 ml. The fecal coliform at all sampling locations was found in the range of 0 to 4.10 MPN/100 ml. With time, the residual chlorine in the transported water dechlorinates. After covering some distance, the residual chlorine of the water was completely diminished thereby supporting massive microbial growth. The study proposed the likely causes of the transit dechlorination of water and recommended carrying out compulsory chlorination at water sources while maintaining reasonable residuals at the consumers’ end to eliminate the bacteriological contamination.

Key words: Residual chlorine, total and fecal coliforms, drinking water chlorination, water contamination.