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Water from a well is usually pure, but water in a well that has fallen into disrepair can become polluted. Ways in which such wells can be improved are described and illustrated.

Adapted, with kind permission, from material originally published as "Technical Brief No 39" in Waterlines Vol 23 No 2 (October 2004) by Practical Action Publishing, (formerly ITDG Publishing) - The Schumacher Centre for Technology & Development, Bourton on Dunsmore, Rugby CV23 9QZ, United Kingdom - Water Engineering Development Centre, Loughborough University.
Original material published in Rural Water Supplies and Sanitation by Peter Morgan, The Blair Research Laboratory, Ministry of Health, Harare, Zimbabwe. Published by Macmillan, London, 1990.

This edition was published in the United Kingdom in 2019 by MissionAssist.