India, March 16 -- Fourteen of the 37 sewage treatment plants (STPs) in Delhi are either non-operational (undergoing rehabilitation) or do not meet the water treatment parameters set by the Central Pollution Control Board (CPCB), the February report on STP functioning shows.

Mehrauli and Vasant Kunj STP fare worst with violations in all four parameters, including faecal coliform, biological oxygen demand (BOD), chemical oxygen demand (COD) and total suspended solids (TSS), while the units at Kapashera and Molarband are undergoing repair and upgradation.

Several STPs, which are a primary tool for cleaning up the Yamuna, are also unable to meet the standards.

According to the latest report of the Delhi Pollution Control Committee (DPCC) ...