The Average Daily Influent Flow Rate is the total volume of wastewater entering a treatment facility per day, averaged over a specified period, typically measured in cubic meters per day (m³/day). And is denoted by Q. Average Daily Influent Flow Rate is usually measured using the Cubic Meter per Day for Volumetric Flow Rate. Note that the value of Average Daily Influent Flow Rate is always positive. Typically, the value of Average Daily Influent Flow Rate is greater than 0.