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Drinking water Quality analysis of Water supply network at Ghanish valley Hunza-Nagar Gilgit-Baltistan, Pakistan

Author Affiliations

  • 1Environmental Protection Agency, Gilgit-Baltistan, Pakistan and Department of Environmental Sciences Karakorum International University, Gilgit-Baltistan, Pakistan
  • 2Environmental Protection Agency, Gilgit-Baltistan, Pakistan
  • 3Environmental Protection Agency, Gilgit-Baltistan, Pakistan
  • 4Environmental Protection Agency, Gilgit-Baltistan, Pakistan

Int. Res. J. Environment Sci., Volume 5, Issue (3), Pages 54-62, March,22 (2016)


The drinking water quality of water supply network of Ghanish valley Hunza-Nagar has been studied. Water quality testing along with sanitary inspection of the entire distribution network was carried out during the last week of July, 2011. The various constituents monitored include the physio-chemical characters like pH, turbidity, temperature, color, odor and taste, electrical conductivity, total dissolved solids; chemical parameters include nitrate and nitrite; and microbiological parameters like E. coli count. Waqtech water testing kit was used for microbiological analysis which employs the membrane filtration technique. Chemical parameters were analyzed by using Photometer. Results obtained from assessment of different physio-chemical parameters were as follows. Temperature value fluctuate between 16-25 °C, turbidity levels were 200-500 NTU, pH ranged from 7-8.3, Electrical Conductivity ranged from 200-400 µS/cm, TDS values were 208-580 ppm , and E. coli (colonies) were 6-17 at different sampling locations. Nitrate concentration was 20.3-49.0 and nitrite was 1.0-2.9 respectively. Results showed that all the samples taken from water distribution network were bacteriologically contaminated with E. coli (colonies) an indicator organism of water borne diseases, falls in high risk category according to WHO guidelines and not fit for human consumption. During the sanitary inspection it was found that the sewage collection system, the main sewer of Karimabad is very close (4 to 5 feet), and on the upstream drinking water supply channel of Union Council Ghanish. Due to choking of manholes of sewers of Karimabad, the sewage enter into the water supply channel of Ghanish making it contaminated bacteriologically and thus become source of water borne disease. It was found that design of Karimabad sewage system is faulty, improper operation and maintenance and lack of technical expertise make it a health hazard for the people of Ghanish valley. During summer due to tourist influx, the main sewer use to choke twice in a month and majority of tourists belong to western countries that may spread new strains of microorganisms and subsequently new episodes of outbreaks in the respective village.


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