What unit is commonly used to express flow rate in water quality analysis?

The common units used to express flow rate in water quality analysis often include Million Gallons per Day (MGD). This unit is particularly popular in the field of water resource management and wastewater treatment because it allows for a convenient way to express large volumes of water. Using MGD is especially useful when dealing with municipal water systems, where flow rates can be substantial, and it provides an easily understandable figure for decision-makers and the public.

In contrast, while Liters per Second (L/s) and Cubic Meters per Hour (m³/h) are also used in various contexts, they may not be as widely recognized or practical for the large-scale measurements typical in municipal or industrial water systems. Gallons per Minute (GPM) is more suited for smaller systems or individual measurements rather than for broader system operations. Therefore, Million Gallons per Day stands out as the standard unit for expressing flow rates in the context of extensive water quality analysis.