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coliform bacteria

British  
/ ˈkɒlɪfɔːm /

plural noun

  1. a large group of bacteria inhabiting the intestinal tract of humans and animals that may cause disease and whose presence in water is an indicator of faecal pollution

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Despite being widely trusted, bottled water was six times more likely to test positive for coliform bacteria than other water sources.

From Science Daily ● Jan. 23, 2026

Many of the violations were for unsafe levels of arsenic or coliform bacteria.

From Los Angeles Times ● Sep. 15, 2025

As of Thursday, the board has lifted the advisory in the city’s West Bank, while the East Bank’s was extended, with two out of 90 water samples testing positive for coliform bacteria.

From Salon ● Aug. 8, 2024

Officials said water from a fire hydrant at one of 13 test sites tested positive for coliform bacteria, which, while unlikely to cause illness, can indicate the presence of other pathogens.

From Washington Post ● Jul. 14, 2018

Tschannen said the well at her house tested positive for coliform bacteria, so she and her husband were also drinking bottled water.

From Washington Times ● May 6, 2017

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