What is the required volume for a water sample for coliform compliance?

The required volume for a water sample for coliform compliance is 100 mL. This volume is consistent with standard practices and regulations set forth by agencies concerned with water quality monitoring, such as the U.S. Environmental Protection Agency (EPA). Collecting a 100 mL sample ensures that there is sufficient volume to accurately detect the presence of coliform bacteria, which are indicators of potential contamination and can suggest the presence of harmful pathogens in drinking water.

By adhering to the 100 mL standard, water test results become more reliable and representative of possible issues within the water supply, allowing for appropriate action to be taken if contaminants are detected.