This article presents the results of a local survey conducted in a French wine-growing region where the public authorities were considering irrigating fields and green spaces with treated wastewater. 845 potential consumers were interviewed face-to-face close to their purchasing place. The majority were in favour of such a project and willing to use recreation areas and purchase local farm products irrigated with treated wastewater. However, we demonstrated the paucity of lay knowledge about treated wastewater. Simple information flyers have a significant effect on attitudes and intended behaviours. Nevertheless 20% of informed respondents said they would no longer buy such irrigated products. Given the lack of confidence in the public authorities' guarantee of food quality, they will be unlikely to change their minds. These unacceptable results to farmers may interest public authorities promoting these projects, still rare in France, in response to the increase in droughts.