Updated: September 17, 2021 7:11:15 pm
Areas such as Dadar, Dharavi, Parel, Byculla, Goregaon and Mulund have reported an increase in contamination of drinking water in the last one year, according to data from the Brihanmumbai Municipal Corporation’s (BMC) annual Environment Status Report (ESR) for 2020-21.
Of the total 29,051 water samples that were checked by the civic body for the period, 275 — 0.94 per cent of the total samples — were found contaminated.
The ESR for 2020-21, which was shared with corporators on Thursday, showed that the highest amount of contamination in water samples – 3.4 per cent — was detected in the G-north ward (Dadar, Dharavi), followed by 2.4 per cent P-south (Goregaon), 2.3 per cent in T ward (Mulund) and 2.2 in F-north (Sion, Matunga).
All of these wards have recorded a rise in water contamination in the last one year.
Last year, in G-north, contamination stood at 1.5 per cent while in F-north it was 0.1 per cent. Similarly, in P-south it was 1.3 per cent while in T ward it was 0.2 per cent, showed the report.
Officials said that out of the total water samples collected for testing, 275 showed the presence of E-coli bacteria, which can cause diseases such as diarrhoea and dysentery. As per the standards, drinking water should be free of E-coli.
The testing of samples was carried out at BMC’s laboratory at Dadar. According to the officials, the contamination could have been due to damaged or old water supply pipelines. “In the last five years, we have replaced old and eroded pipelines across the city. However, some are yet to be changed. We ensure that water from reservoirs are 100% pure, and the contamination could be during the transmission to users,” said an official from the Hydraulic Engineer department.
He added, “We collect 200-250 samples from random places (for inspection).”
The BMC supplies 3,850 million litre water daily to the city. There are 27 service reservoirs from which the water is supplied to housing societies, commercial establishments and slums. Mumbai has more than 4 lakh metered water connections.
This March, the BMC had bagged the Jal Nirmalata Award for 2019-20 from the Ministry of Consumer Affairs for purity of water. The civic body is also constructing water tunnels—Powai to Veravali, Powai to Ghatkopar, and Amar Mahal to Trombay Reservoirs – in a bid to prevent water contamination.
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