Herbal Shampoo Recipe

Instead of purchasing the commercial shampoo products in your local grocery store, how would you like to make your own? Point of Interest recently posted a recipe for Herbal Shampoo. This recipe seems pretty simple and most of the ingredients I can find at my local Whole Foods.  I think the most difficult would be the spring water since I do not collect my own water but I am wondering if you can substitute it with distilled water.  Does anyone know?