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This study was conducted to identify the gaps that exist between ventilated improved pit (VIP) latrine construction practices in Cape Coast, Ghana, and conventional technical guidelines, and to assess how any non-compliance with technical guidelines influences the users’ perception of odour and fly nuisances. An inspection guide was used to assess 127 VIP latrines, while a questionnaire survey was used to obtain feedback from 211 users of the latrines on their perception of odour and fly nuisance. Not a single latrine was found to be fitted with a vent pipe that satisfied the recommended diameter of 150 mm. Aside from the vent pipe diameter, only 5.5% of latrines complied with all four other design guidelines that were assessed. However, with the exception of failure to install insect screens on vent pipes, which was associated with the users seeing flies in the latrine cubicles, failure to comply with other guidelines did not necessarily lead to significantly higher user perception of the targeted nuisance. The findings of the study suggest that user perception of odour in their latrines may be more influenced by non-structural factors such as the management or cleanliness of the latrines rather than their structural designs.

water practice and technology

Design and construction of household ventilated improved pit latrines: gaps between conventional technical guidelines and construction practices in Cape Coast, Ghana