31-07-2025
Pollution board says it found coliform and E. coli contamination in 6 Janakpuri homes
New Delhi: Central Pollution Control Board (CPCB), which collected samples of tap water from 12 houses in Janakpuri, has found the presence of total and fecal coliform bacteria in six houses and E.
coli in two homes.
"… in six samples, total coliform and E. coli were not detected. In three samples, total coliform was detected but with values close to the lowest detection limit, and E. coli was not detected. In two samples, total coliform was detected but E. coli was not detected in one and detected in the other, but the E. coli value was close to the lowest detection limit, and in one sample, both total coliform and E. coli were detected above detection limits," CPCB said in its report.
The central agency has told National Green Tribunal that the samples of the
Delhi Jal Board
supplied water were collected on July 20.
T
he tribunal had earlier sought details from the pollution watchdog to assess the water quality after residents complained about the contaminated water. "In compliance with the order dated July 16, 2025, CPCB collected samples... from 12 houses on July 20, 2025," it said in the report dated July 28.
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CPCB had also collected seven water samples on June 30 from other houses of A1 Block of Janakpuri.
It added that the samples were analysed for bacteriological parameters such as total coliform, fecal coliform, E. coli, and free residual chlorine.
It pointed out that "The Drinking Water Standards of Bureau of Indian Standards-IS 10500:2012 prescribes that total coliform and E. coli shall not be detected in 100ml of drinking water samples."
Last week, DJB also apprised the tribunal that it discovered an interconnection of a dead water pipeline with an active one, which led to the contamination in the Janakpuri area. It said that several short-term remediation steps were taken to resolve the issue. DJB also said that it had collected 59 samples between March and July from Janakpuri, A Block. DJB said that out of 59 samples, it found samples from only three houses to be unsatisfactory and contaminated with coliform.
