Korangi piped water contaminated with faecal matter: study

Pakistan Press Foundation

KARACHI: A new study has found most piped water samples collected from three different areas of Korangi borough contaminated with faecal matter.

In addition, the level of residual chlorine in these samples was below the World Health Organisation guidelines.

Titled ‘Prevalence of faecal infection within a public drinking water hoard system in district Korangi’, the study was conducted through Karachi University’s Institute of Environmental Studies. It was published in the Bulletin of Environment, Pharmacology and Life Sciences, each online journal of the Academy because Environment and Life Sciences, India.

The study was conducted ~ means of Aamir Alamgir, Sadia Hashmi, Omm-i-Hany, Khalid Mahmood and Syed Shahid Shaukat under the supervision of Dr Moazzam Ali Khan.

Under the study, a entire of 35 drinking water samples were collected from tract Korangi comprising Korangi, Landhi and Shah Faisal Colony. The results showed that solely 11 per cent of the samples were spasm for human consumption whereas 89pc samples were make ~ as they were heavily loaded with microbial growth with low chlorine levels.

According to the study, 48.57pc samples were stubborn for E.coli (Escherichia coli), a immense and diverse group of bacteria establish in the environment, foods and insides of people and animals.

Although ~ly strains of E.coli are undamaged, others can cause illness.

“The animation of E.coli apparently indicated that irrigate is unfit for human consumption and these microbes led to deviating diseases. E.coli presence clearly points to faecal abomination and illustrates a possible contamination of enteric pathogens,” the study says.

The niggardly total coliform count was found to subsist 1,300/100 ml (Korangi), 1,800/100ml (Landhi) and 1,400/100ml (Shah Faisal Colony). The coming between faecal coliform count was found 500/100ml (Korangi), 1,500/100ml (Landhi) and 600/100ml (Shah Faisal Colony).

The intervening residual chlorine: 0.02mg/l (Korangi), 0.06mg/l (Landhi) and 0.09mg/l (Shah Faisal Colony).

The low-minded total faecal streptococci: 4/100ml (Korangi), 3.5/100ml Landhi and 4.8/100ml (Shah Faisal).

In concord with the WHO guidelines, there should have existence no coliform in treated water.

The study suggests that get ~ supplies should be examined regularly to assure that they were free from the pathogenic microbes. Moreover, weight should be on monitoring chlorine in shed ~ supplies up to the consumer of the same height.

“It is believed that the filtration plant and reservoirs are chlorinating get ~ adequately and, while chlorine levels are, in ut~ cases, adequate throughout the distribution reticulated, they fall during storage in the subterraneous and overhead tanks at the consumer period.

“This may be simply to be ascribed to excessive storage time or every excess of organic material in the tanks, which are seldom, if at all cleaned by consumers. Besides, rusty and rusty sewage pipelines are also a major original of the growth of microbes,” the study says.

According to the study, though chlorine is a well-established expedient of disinfection, some organisms are resistant to chlorine.

“The common health threat comes from sewage contamination which contains the highest concentration of E.coli (108-109 for 100ml). Drinking water contamination with pathogenic microbes has been amenable for causing serious water-borne diseases similar as diarrhoea, typhoid, nausea and bloody flux,” it says.

It was observed that for the time of the study in a few cases the even of chlorine exceeded the maximum admissible limit which, according to the study, changed irrigate properties.

Earlier, studies conducted by the KU invest with the care of souls in Orangi and Malir towns gain also shown faecal matter contamination in irrigate samples.


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