Which microorganisms are commonly tested for in public pools?

The microorganisms commonly tested for in public pools include E. coli and Giardia. E. coli is a fecal indicator bacterium that can signal contamination from human or animal waste, making it a key marker for assessing the safety of pool water. Its presence indicates that harmful pathogens may also be present, posing health risks to swimmers. Giardia is a protozoan parasite that can cause gastrointestinal illness and is resistant to chlorine, making it a concern in recreational waters.

Monitoring these two microorganisms helps ensure that public pools are safe for use, as they are both associated with waterborne diseases and are commonly linked to fecal contamination. Regular testing for E. coli and Giardia is essential to maintain water quality and protect public health in swimming facilities. Other options like Salmonella, Listeria, Vibrio, Shigella, Campylobacter, and Cryptosporidium, while significant pathogens, are not the primary focus of routine testing in public pool environments.