It is relatively difficult to find this info in a strait forward way. I've never found the actual floride break down in government literature but will definately investigate wombats links. I know the concentration of floride because the nestle water company has a plant that bottles guelph ground water as natural artesian water and gives the floride concentration right on the lable of the bottles. The company is less than 5kms from my home and uses the same water source as the
city. Not 100% sure about calcium and floride but have read it several times in the last year or so. We have so much lime in our water it shows up as a residue after a short time. I'll look for the links.