IRIBARNEGARAY Martin Alejandro
Improved Risk Assessment and Risk Reduction Strategies in the Water Safety Plan (WSP) of Salta, Argentina
SEGHEZZO, L.; GATTO D´ANDREA, M. L.; IRIBARNEGARAY, M. A.; LIBERAL, V. I.; FLEITAS, A.; BONIFACIO, J. L.
WATER SCIENCE AND TECHNOLOGY
I W A PUBLISHING
Año: 2013 vol. 13 p. 1080 - 1089
The Water Safety Plan (WSP) for the city of Salta (Argentina) is presented and discussed. The WSP was developed following the methodology proposed by the World Health Organization (WHO) adapted to local circumstances. Changes included a preliminary weighting procedure to assess the relative importance of different parts of the system, and a more systematic estimation of the magnitude of control measures. These modifications allowed the definition of a variety of riskreduction strategies. The risk assessment step was performed during participatory workshops withmembers of the water company. Initial risk for the entire system was 30.2%, with some variationsamong processes, sub-processes and components. More than 60% of the hazardous situationsidentified require some kind of control measure, assuming an acceptable risk threshold of 24%. Ifall control measures were successfully implemented, the final risk could be lowered to 17.7%.Methodological changes introduced allowed a more detailed analysis of the risks and can be animportant improvement of the original assessment method.