What is the largest united states domestic use of water?
washing dishes
washing laundry
toilet flushing
showering

In order to help the student expand his/her knowledge I will help answer the question. This in hope that the student will get a piece of knowledge that will help him/her through his/her homework or future tests.  

Toilet flushing is the largest United States domestic use of water. Just think about it we all use it and more than we take showers. One would thing that showering is the largest domestic use but it’s not.  
   

I hope it helps, Regards.      

The study of where things are 

It just all depends on where you live at the moment