India, May 22 -- At least seven sewage treatment plants (STPs) have failed the prescribed discharge standards for total suspended solids, biochemical oxygen demand and faecal coliform levels in April, the latest Delhi Pollution Control Committee (DPCC) report said.

Testing standards across more than 30 STPs in the national capital, the report provides data for samples collected from both inlet and outlet points. The Ghitorni, Vasant Kunj-I, and Delhi Gate (Old) STPs fared the worst, failing on all four parameters: faecal coliform, BOD, chemical oxygen demand (COD), and total suspended solids (TSS). Vasant Kunj-II, Yamuna Vihar Ph-I, Yamuna Vihar Ph-III, and Mehrauli STPs failed on three parameters - TSS, BOD and faecal coliform.

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