Coliform bacteria are:

Coliform bacteria are:

• A. Pathogens
• B. Indicators
• C. Beneficial Bacteria
• D. Nitrifiers

Answer: (B)

Coliform bacteria are indicators of water quality and fecal contamination. They’re used as surrogate markers to signal the possible presence of pathogenic microbes and to gauge how well a treatment and disinfection process is performing. They aren’t the pathogens themselves, but their presence suggests contamination from fecal matter and the potential for harmful organisms to be present, so a treatment plant checks and, if needed, enhances disinfection or investigates the source. They’re chosen because they’re common in feces, relatively easy to detect, and their levels relate to contamination risk. They aren’t beneficial bacteria in the treatment process, and they aren’t nitrifiers, which are a different group responsible for ammonia oxidation.

Coliform bacteria are indicators of water quality and fecal contamination. They’re used as surrogate markers to signal the possible presence of pathogenic microbes and to gauge how well a treatment and disinfection process is performing. They aren’t the pathogens themselves, but their presence suggests contamination from fecal matter and the potential for harmful organisms to be present, so a treatment plant checks and, if needed, enhances disinfection or investigates the source. They’re chosen because they’re common in feces, relatively easy to detect, and their levels relate to contamination risk. They aren’t beneficial bacteria in the treatment process, and they aren’t nitrifiers, which are a different group responsible for ammonia oxidation.