Mithi river polluted for last 11 yrs, says MPCB report

The 12 months 2012-13 was the one exception previously 11 years when the water high quality of the Mithi river fell within the non-polluted class. The Mithi traverses via slums, squatters, industrial and residential complexes of Powai, Saki Naka, Kurla, Dharavi and Vakola earlier than ending at Mahim creek and at last into the Arabian Sea, which is crammed with water hyacinth, rubbish, plastic and sewage.

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Mithi river continues to stay a reason for concern regardless of years of desilting and cleansing workout routines. In early 2021, Brihanmumbai Municipal Company’s (BMC) standing committee gave its approval for the development of tunnels to forestall the discharge of uncooked sewage and wastewater into the Mithi river. Nevertheless, the mission is pending environmental clearance.

The report on the Water High quality Standing of Maharashtra 2020-21 was printed by the Maharashtra Air pollution Management Board (MPCB) this week. MPCB measured air pollution ranges utilizing the water high quality index (WQI), which gives a single quantity on general water high quality.

A complete of 43 parameters are thought of to calculate WQI, of which pH degree, dissolved oxygen, biochemical oxygen demand (BOD) and faecal coliform are 4 core parameters.

Whereas 38 or much less is ‘dangerous to very dangerous’ or closely polluted (pink), 38-50 is ‘dangerous’ or polluted (orange); 50-63 is ‘medium to good’ or non-polluted (yellow); and 63-100 is ‘good to wonderful’ (inexperienced). The general WQI of Mithi river for the 12 months was 44, falling within the polluted class.

The Mithi and Mahim creek, into which the river flows, had been the one two listed water our bodies within the metropolis which had been closely polluted in April 2020, with air pollution ranges at 25.84 (Mithi) and 37.55 (Mahim creek). Versova, Juhu, Nariman Level, Gateway of India, Malabar Hill, Girgaum Chowpatty, Haji Ali, Shivaji Park Dadar and Worli Sea Face all recorded ranges starting from 51 and ,58 that’s, yellow class or non-polluted within the peak pandemic interval of April 2020.

The samples collected from nallas (drains) from Thane and Palghar districts have been constantly recording WQI within the polluted class. This is perhaps because of the launch of business effluents from close by areas and waste from human settlements across the nallas, famous the report.

Officers have famous that the discharge of untreated home sewage into the ocean was one of many primary causes behind the excessive degree of air pollution. In response to the report, the town generated 2,190 million litres of sewage each day, out of which just one,285 million litres per day are handled by the seven remedy crops put in within the metropolis.

All seven sewage remedy crops, nevertheless, carry out solely main remedy earlier than discharging it into the ocean. Many components of the town shouldn’t have sewerage networks. So that they immediately discharge uncooked sewage into water our bodies, just like the Mithi river.