Even in this age of the Web, the best way to learn about a subject (other than working in the subject area yourself) is to read a good book on it.
One introductory-level book you might be able to find in a library
is Water, by L.B. Leopold and K.S. Davis,
a volume in the "Life Science Library," published by
Time Inc. in 1966.
A more recent book which looks at the role of water in many areas of science and society is Life's Matrix: A Biography of Water by Philip Ball (Farrar, Straus and Giroux, New York, 2000, first published in Great Britain in 1999 by Weidenfeld and Nicolson as H2O: A Biography of Water).
A short book with a lot of scientific information on water (at about a college level) is Water by Felix Franks (Royal Society of Chemistry, London, 1983).
There are also some sources of information about water
on the WWW:
The U.S. Geological Survey has an extensive "Water Science for Schools" website.
For information on water as a natural resource, a project at the University of Minnesota has constructed a "Water on the Web" site
The U.S. National Science Foundataion has a site devoted to The Chemistry of Water.
Finally, we can mention a website that is specifically
devoted to answering scientific questions, primarily
from students. It is called the
Mad Scientists Network.
There you can search their collection of answers to common scientific questions, and if you don't find the answer you need you can submit your question to be answered by one of their network of experts.
Updated December 11, 2006