Texas Commission on Environmental Quality (TCEQ). Class C Water License Exam

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In water treatment, what does the term "mgd" stand for?

Mega-gallons per day
Million gallons per day
Medium gallons per day
Measured gallons per day

The correct answer is: Million gallons per day

The term "mgd" stands for "million gallons per day." This measurement is commonly used in water treatment and environmental engineering to express the flow rate of water in a system, particularly in the context of water supply, wastewater treatment, and various other applications involving large volumes of water. Using "million gallons" as a unit allows for a manageable way to report and understand the significant quantities of water involved in both treatment processes and consumption metrics, which tend to be large figures. This term helps water treatment professionals and regulators communicate data on capacity, usage, and treatment efficiency in a concise and standardized manner. The other choices do not accurately represent the standard measurement used in the industry, with "mega-gallons per day" being a misleading term as "mega" typically refers to a factor of one million in a different context or to larger measures in some cases, "medium gallons per day" being an undefined and non-standard measure, and "measured gallons per day" simply describing a potential process rather than an established unit of measure.