What is the volume required for a Total Coliform sample?

The volume required for a Total Coliform sample is 100 mL. This standard volume is established to ensure accurate and reliable testing results. Sampling at this volume allows for an effective evaluation of the water quality and the presence of coliform bacteria, as it provides sufficient material for multiple tests and complies with regulatory protocols set by organizations such as the Environmental Protection Agency (EPA).

Analyzing a 100 mL sample strikes a balance between providing enough water for the necessary laboratory analysis while also ensuring that the testing is manageable and cost-effective for facilities engaged in water treatment monitoring. Using too small a volume could lead to an insufficient representation of the water’s quality, while larger volumes may not be practical for field sampling or testing purposes.