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What is the Safe Water System (SWS)?
Why was the SWS developed?
Who is the SWS for?
Where has the Safe Water System (SWS) been used?
How is a SWS started?

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Where has the Safe Water System been used?
Guatemala


Project Partners

  • CDC
  • Universidad de Valle, Guatemala City, Guatemala
  • Instituto Nutricional de Centroamerica y Panama, Guatemala City, Guatemala
  • The Procter and Gamble Company

Target Populations/Location

  • Food vendors in municipal marketplaces in Guatemala City

Project Design

  • Research project to determine whether use of the SWS would improve the quality of beverages prepared by street vendors

Intervention Elements

  • CDC safe water storage vessel
  • Locally available commercial bleach
  • Antibacterial soap
  • Health education

Project Implementation Date

  • June 1996

Results of Project Evaluations

  • Street-vended foods and beverages, an integral part of urban economics in the developing world, have been implicated in cholera transmission in Latin America. To improve the microbiologic quality of market-vended beverages in Guatemala, we tested a simple system consisting of dilute bleach (4.95% free available chlorine) for water purification, narrow-mouth plastic vessels with spigots for disinfecting and storing water and for preparing and storing beverages, handwashing soap, and education in using the system. We conducted a randomized controlled intervention trial among 41 vendors who received the intervention and 42 control vendors, comparing total and fecal coliform bacteria and Escherichia coli contamination of market-vended beverages, stored water, and vendors' hands. Samples were obtained at baseline and at each of six weekly follow-up visits. At baseline, fecal coliform bacteria were found in 40 (48%) market-vended beverages and E. coli in 14 (17%). When compared with samples from control vendors, a significant decrease in total coliform (P<0.001) and fecal coliform (P<0.001) bacteria in samples of stored water and beverages sold by intervention vendors was observed over the course of the study. The vessel system was well accepted by vendors.

For More Information

  • [email protected]
  • Sobel et al. 1998

 

  

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