I stumbled across a gold mine of info regarding water... DIY well drilling, pumping, rain catchment, irrigation, etc. These are all low-cost, low-tech methods that are being applied in third world countries, but could just as easily be applied on the homestead!
http://akvo.org/wiki/index.php/Portal:Water
It mentioned that some of the above info came from this booklet - free for download... http://www.irc.nl/redir/content/download/24505/274956/file/SWS_2006.pdf
Good info on sanitation also Andrew
http://www.akvo.org/wiki/index.php/Portal:Sanitation
Thanks - good find
Continuing reading on the second site I found a free search with mostly free documents - thousands it looks like.
http://www.irc.nl/docsearch/search
Solar disinfection of drinking water is easy using a clear plastic soda bottle and the sun.
http://www.akvo.org/wiki/index.php/Sodis
Drinking (or eating) from plastics after they have been heated up, in sun is not a good thing. Chemicals as well as tiny particles of plastic leach out into the water, or food. Not good for the digestive system, or kidneys. One of the worst is BPas.
I was wondering about that... I've always thought water that had been warmed in plastic tasted bad. I'd use glass jars if possible..