A new study on water usage inside U.S. homes found toilets led the way for the highest water use, followed closely by showers, while dishwashers used the least. The new research also comes with some surprises, including the strong association of humidifiers to high water usage, while other findings may be less surprising, such as that heavily regulated cities in California having the lowest water usage in the study. … This study was published in Earth’s Future, AGU’s journal for interdisciplinary research on the past, present and future of our planet and its inhabitants.