According to the latest report from the Delhi Pollution Control Committee (DPCC), nine out of 37 sewage treatment plants (STPs) in Delhi are either non-operational or do not meet the water treatment standards set by the Central Pollution Control Board (CPCB). The report, dated April 13, indicates that while there has been a reduction from 14 STPs failing to meet standards in February, the water quality of the Yamuna River has deteriorated. In March, faecal coliform levels surged to 400,000 units, significantly exceeding safe limits, and biological oxygen demand (BOD) reached 60 mg/l, which is 20 times the acceptable limit of 3 mg/l. Notably, the Ghitorni, Vasant Kunj-I, and Delhi Gate STPs failed all four key parameters of water quality assessment. Experts have criticized the discrepancy between the reported improvements in STP performance and the worsening conditions of the Yamuna, highlighting the need for more effective sewage treatment practices. Furthermore, the Delhi Jal Board's flagship Interceptor Sewage Project (ISP), which has reportedly cost over ₹2,454 crore (approximately $300 million USD), has only managed to stop 60% of the sewage it was intended to divert, leaving significant untreated waste still entering the river.