New Delhi: The Delhi government has submitted a report to the National Green Tribunal (NGT), outlining the steps taken and future action to improve pollution levels in Yamuna.
Measures include increasing the capacity of existing STPs and laying more sewer lines. The government has also said that the river is cleaner than last year.
In January, the NGT had constituted a high-level committee under the chairmanship of the LG to prepare a detailed action plan for cleaning the Yamuna. Later the panel was chaired by the Chief Secretary. In his reply on December 12, he referred to monthly meetings of the committee, which focused on eight action points for river rejuvenation.
The reply stated that the objective of undertaking the work was 100% treatment of sewage, blocking of drains, sewage network in unauthorized colonies, industrial effluent management, regulation of flood plains and utilization of treated waste water from STPs. It also said that sewage treatment has increased from 535 MGD in January 2021 to 570 MGD in November 2023.
The reply said that out of over 400 industrial units inspected, show cause notices were issued to 289, along with directions to shut down 115 polluting industries.
Taking ISBT Bridge as a reference point, it said the biochemical oxygen demand (BOD) was 50 mg/l in November 2022, improving to 38 mg/l in November 2023. For a clean river, BOD should be less than 5. mg/l. According to the reply, "Yamuna water quality has improved in 2023 compared to other months of 2022."
Meanwhile, with an aim to ensure that the toxic foam of the Yamuna is not visible, the Environment Department of the Delhi government has asked the UP Irrigation and Water Resources Department to remove water hyacinth from the ponds near the Okhla Barrage and create a gentle slope to avoid overflow. Instructed to provide. disturbance,
It has also been directed that the gates of the barrage should be opened in such a way that free fall of the discharge is prevented.
"Opening and closing of gates of Okhla Barrage should be regulated in consultation with the concerned Irrigation and Flood Control and Delhi Jal Board," the Environment Department said. It added that if necessary, hydraulic experts may be consulted in this regard. Is.
Foam is formed in the Yamuna due to the absence of dissolved oxygen (DO) in the river and untreated effluents and surfactants and phosphates from detergents used locally or industrially, indicating pollution.
The latest water quality report from the Delhi Pollution Control Committee shows that the water is not. Meet safety standards with respect to phosphate, surfactant, dissolved oxygen and biochemical oxygen demand. DPCC, which tested water samples from Yamuna in October
4. lso analyzed the levels of phosphates and surfactants in the river and found their concentrations to be high at most places in the city.
Latest reports show variation in surfactant concentrations from 11 mg/1 at palla (entry)
Paint in the city), it starts rising downstream of Ghaziabad, reaching 8.8 mg/l at Okhla Barrage and 11.4 mg/l at Asgar pur, where the river exits Delhi, Okhla Barrage Phosphate levels and BOD also increase rapidly. Showing the river's inability to heal itself.
Surfactants enter water through discharge of aqueous effluents from households, industrial laundering and cleaning operations, while phosphates are used extensively. boiler water treatment
December 14,2023
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