International Scientific Forum on Home Hygiene

Home Hygiene & Health

The Leading Source of Scientific, Professional & Consumer Information
International Scientific Forum on Home Hygiene

Home Hygiene & Health

The Leading Source of Scientific, Professional & Consumer Information

Chlorine spot treatment of flooded tube wells, an efficacy trial.

The study team identified and tested water samples from 127 tube wells that were flooded within the preceding 4 weeks. On initial screening, water samples from 56 recently inundated tube wells (44%) were contaminated with thermotolerant coliforms. Among the 13 wells randomised to chlorination, there was no change in the proportion of water samples that had no detectable thermotolerant coliform bacteria immediately before chlorine treatment (n=4, 23%) and 60 minutes following chlorine treatment (n=4, 23%). Similarly, there was no difference in the proportion of water samples that had no detectable thermotolerant coliforms between chlorine spot treated and control tube wells 7-18 days later. The study suggests that unless modified methods improve effectiveness, resources should not be spent promoting spot chlorination of flooded tube wells. Journal of Applied Microbiology 2006;100:1154-8.