The classic way to convey the error that exists in a measurement is a formula that shows the obtained measurement (X) as a sum of a true score plus some error. One version of this formula is: X = T + e. With this formula in mind, obtaining more precise measures depends on reducing error.
  Mega is the prefix meaning one million, therefore there are one million (1,000,000) gallons in a mega gallon.
Million gallons per day (mgd) = 694.4 gallons per minute (695 for ordinary calculations) = 1.547 cubic feet per second (1.5 for ordinary calcula-tions) Using Conversion Table To use the above conversion table, first locate the know unit of measurement in the left hand column headed âUnits.â