What is the minimum contact time when using the chlorine tablet method of disinfection?

The minimum contact time when using the chlorine tablet method of disinfection is 24 hours. This is important because adequate contact time allows the chlorine to effectively kill harmful pathogens in the water, ensuring that the disinfection process is thorough and effective.

The chlorine tablet method requires a set amount of contact time to achieve the necessary reduction of microorganisms, including bacteria and viruses that could pose health risks if the water is consumed. By allowing 24 hours for the chlorine to act, the disinfection process is optimized, providing a safer water supply for consumption.

In practice, if the contact time is less than 24 hours, there is a risk that some pathogens may not be sufficiently inactivated, which could compromise water safety. It's crucial to adhere to this guideline to ensure that water treated with chlorine tablets meets health standards for safe drinking water.