The next World Water Day is March 22, 2012. It sounds like it’s ages away, but we like to plan for things early around the library. So naturally, I’ve been thinking about my water usage. I used this water calculator from the USGS and was surprised that I use more than 350 gallons of water every week. A gallon of water weighs 8 pounds; if I had to carry every gallon from a well to my home, I know I would be more careful with the amount of water I use.