I teach water well drilling to villagers in the developing world using a hand powered auger. The first young man I taught in Kenya had done 260 wells between 1987 and 1996. He would charge about $120 to $150 to drill the well and install a home made PVC hand pump. These wells were usually 25 to 45 feet deep, occasionally going to 65 feet. Usually 3 to 10 families would use the well to get “Cleaner water, Closer water, More water”.
Some of my early students here in the US, Steve & Jennifer Lorch have really “taken the ball & run with it”. They have started HydroMissions, http://www.hydromissions.com/ to make & market well drilling kits.
If you need to hand drill through harder formations, see http://www.wellspringafrica.org/ for instruction on hand powered percussion drilling.
EMAS in Bolivia http://www.emas-international.de/index.php?id=32&L=3
have an excellent series of videos on how to make the PVC pumps. http://vimeo.com/8365884
The mission I belong to teaches well drilling, pump repair, BioSand water filters and many other things at our training center in Marion, NC. http://www.equipinternational.com/training-courses/ati-water-well-drilling.htm
This shameless plug has been brought to you by BwanaNdege.
Here’s a brief video of the young man showing a well he made near Kitale, Kenya.
http://video.google.com/videoplay?docid=4629383911705480631#
Helping people in poor countries obtain better water supplies and learn to apply basic engineering skills is a truly noble use of your time. I don't need to tell you that though, I'm sure you can see the gratitude on the faces of the new well owners.