Bru'n water is probably one of the best out there.. That is what I use. It is online for download.
Also, check out the "Basic Water Primer" sticky in the Brewing Science forum - good intro, and then more information than you could ever want after. Also, chapter 15 of Palmer's book, how to brew....
I assume you are doing all-grain? Correct?
Kegged/Serving: Porter, Session IPA, Dark Mild
Bottled: Barley Wine, Sour Belgian Golden on Cherries, Sour Cherry Stout
Primary: Double Citra IPA, American Brown Ale, Oatmeal Amber Ale
Future Brews: Heady Topper Clone, Porter, Ordinary Bitter, Dortmunder, Pilsner, Scottish 70, More...... More....... Beer.......