What is the flow rate in gallons per day of a plant treating 5 MGD?

To find the flow rate in gallons per day for a plant treating 5 million gallons per day (MGD), it's important to understand what MGD means. It directly translates to 5 million gallons treated each day.

When calculating flow rates, typically, 1 MGD is equivalent to exactly 1 million gallons per day. Therefore, if a plant treats 5 MGD, this means it treats 5 times 1 million gallons each day.

Calculating this gives:

5 MGD = 5 × 1,000,000 = 5,000,000 gallons per day.

Thus, the appropriate answer is 5,000,000 gallons per day, aligning with the value interpreted in option B.

This understanding is crucial, as it illustrates how flow rates in municipal or industrial settings are defined and reported. The other choices represent values that do not accurately reflect the conversion or context associated with 5 MGD.