Cost of producing the water is approximately 1 kilowatt of energy per gallon

As with a lot of "ad-speak," misuse of terminology makes the commercial message questionable. A kilowatt is a unit of power, and does not say how much energy is required. If you have to dump in a kilowatt for an hour, then the energy used is one kilowatt hour. If you have to pump in a kilowatt for ten hours, then the energy used is somewhat larger, although I probably shouldn't get into big numbers with people who misuse terminology shallowly.

From the same post:

... when they hand out bottles of water at emergency sites, such as Haiti. The cost of this delivery is approximately 8 gallons of fuel for every gallon of water delivered.

The vast majority of "emergency water" is shipped as ice, for the simple reason that there are few tanker trailers available, and the majority are commonly used for chemicals that can't be easily cleaned to safely carry potables. There are lots of refrigerated trailers (and a fair number of ships), used daily for transporting food. Almost any "reefer" can carry potable ice as readily as anything else.

Even a small reefer trailer can carry 30,000 pounds of ice, equivalent to 3,500 gallons of water. The more common sizes carry 48,000 or 60,000 pounds per load. Eight times 3,500 (using the smallest likely size) is 28,540 gallons (of fuel?). It's about 3,000 miles from one end of the US to the other, so the truck uses 10 gallons of fuel per mile? That fuel consumption rate is about right for an M60 tank off the roads in rough terrain, although it would carry a lot less water. In some emergencies an armored delivery vehicle might be a good idea at the destination; but I haven't heard of it being done that way across the whole trip distance, in the US or anywhere else. (On failry good roads, even an M60 uses only about 2.5 gallons per mile.)

This is not meant to single out the particular post - or poster - quoted. It just offered an "easy" calculation requiring minimal "look ups." Several comments thus far in this thread could benefit if the posters would apply a "reasonableness test" or two to the opinions offered.

John