I just read this very sobering article about using impure water in a neti pot for nasal rinsing. Please, if you are using a neti pot, make sure you are boiling or otherwise sterilizing your water before using it. If you are boiling your water to help purify it, please make let it cool to an appropriate temperature before using it. Also, be sure never to force any water into your nasal passages. Neti pots are fantastic, so feel free to use them as you did before once you know your water is pure.