21st September 2006 at 12:47 pm #660
I had the good fortune of visiting Nicaragua (Dec 2005) where we implemented the first Filter project. People there continue to use the concrete filters we built together over ten years ago and they still use them appropriately. I didn\’t have a test kit so I drank a glass of water and never experienced any ill effects.
It would be interesting to actually go and do a survey to see how many of the original 56 filters survive, what people remember in terms of operation and what kind of performance they are getting.
B. J. Buzunis, P.Eng