Faecal contamination on lettuce irrigated with different water sources in Maputo, Mozambique

C. A. Niquice-Janeiro, A. Marques Arsénio, G. Medema and J. B. van Lier

Water International, 2024, vol. 49, issue 2, 201-218

Abstract: Faecal contamination across the lettuce value chain was assessed in Maputo, Mozambique. Escherichia coli was used as an indicator of faecal contamination, with concentrations ranging from 3.4 to 5.7 log units/100 ml in groundwater, river water and partially treated wastewater. Municipal tap water used to wash lettuce heads in the markets had lower than 1 log unit/100 ml. Irrespective of the source of irrigation water, the lettuce heads were contaminated throughout the value chain, with concentrations ranging between 6.5 and 7.8 log units/100 g. Interventions and awareness raising should be applied at every stage of the value chain.

Date: 2024
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DOI: 10.1080/02508060.2024.2325264

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