Here is something that can help those living in the U.S. and doing iontophoresis – especially if they're struggling with getting the most out of the treatment.
You can see the quality of your local water, and I think that's a good way to check the amount of minerals in the tap water used for iontophoresis!
http://water.epa.gov/drink/local/
Cool, right? I got an idea to dig this up after hearing some tidbit about local water quality on news today. 😀
Are there better websites for these reports? Please share if you know… Also, I don't know about other countries – so it would be great if everyone shared their own local information! 🙂