All the reports that I have read and heard about Iraq quoted water quantities in litres. This includes, of course, when British forces supply the water. However, I did hear a report on BBC Radio4 yesterday from a British reporter with American forces. The reporter said that the soldiers were supplying '600 gallons per hour'. This would be US gallons so he was not being helpful to his UK listeners who only understand litres or imperial gallons.
It is 10 gallons per minute and is such a nice round number that I suspect it may come from a reading from flow meter or a pump specification.
