The Yamuna river in Delhi continues to suffer pollution due to untreated sewage, missing effluent treatment plants, delays in projects, and large solid waste gaps, the Jal Shakti Ministry said on December 1, 2025. The Delhi Jal Board spent ₹5,536 crore over the past three financial years to clean the river. Minister of State for Jal Shakti Raj Bhushan Choudhary told Rajya Sabha that Delhi had a sewage treatment gap of 414 million litres per day (MLD) as of August 2025. Several industrial areas still lack common effluent treatment plants, and many sewage treatment projects face delays or need upgrades. Delhi produces 11,862 tonnes of solid waste daily but can only treat 7,641 tonnes, leaving a daily shortfall of 4,221 tonnes. The Yamuna enters Delhi at Palla, where water quality changes throughout the year based on water flow. The Central Pollution Control Board measured Biochemical Oxygen Demand (BOD) at 4 mg/l and Dissolved Oxygen (DO) at 6 mg/l between January and July 2025. The Delhi Pollution Control Committee found better levels in September with BOD at 2.5 mg/l and DO at 9.5 mg/l, which are healthy figures. The National Mission for Clean Ganga is helping states with funds. Under the Namami Gange programme, 35 projects worth ₹6,534 crore have been approved to clean the Yamuna by creating 2,243 MLD of sewage treatment capacity. So far, 21 projects are complete.