Thinking About Buying Organic Soap?

This writer thinks the concept of using organic soap is a reasonable one.Everyone wants to save the earth and make it a better place for us humans to inhabit,including using "green and clean" products that matches that concept and makes us feel like we're all doing our part to help. But if you are thinking about plunking down some considerable change for a bar of organic soap, here are some points to consider.
Soap and water go together like Jack and Jill, a horse and a carriage, salt and pepper and all the various and sundry wordage one can think of. Obviously, without water, that bar of wondrous pure soap would just sit there in your bathroom staring at you,unsullied,and with no conceivable purpose whatsoever.That being said,once water mixes with that bar of expensive organic soap, the entire scenario changes.If you have city water, your water is likely to contain any number of things common to city dwellers such as Chlorine, water softener salts,rust removers,minerals,Flouride and possibly very low levels of arsenic and chemicals,naming a few common ones. These things are all commonplace in water systems across the USA,in what are deemed safe and consumable levels.
So if that bar of soap you're using is pristine and organic,how pristine and organic will it be after your city water has mixed with it?