MG
million US gallons
Volumeexact by definition
A million US gallons is exactly 3,785.411784 cubic metres, or 3.785 megalitres. It is the standard capacity unit of American water and wastewater treatment: plants are rated in million gallons per day (MGD), reservoirs in MG, and design flows are tabulated in nothing else.
Watch out: Read as MGD it is a flow rate, not a volume, and the two are constantly written the same way in reports. One MGD is about 43.8 litres per second or 694 US gallons per minute, and pump curves are in gpm, so plant hydraulics involves converting between them all day.
| 1 MG | 3,785,411.8 L |
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