Urban agriculture and farmers’ willingness to pay for treated wastewater: Insights from vegetable producers in the greater Accra metropolis of Ghana

AbstractUrbanisation and water scarcity pose a challenge to urban vegetable production and livelihoods in major cities across the world. At the same time, increasing demand for fresh vegetables coupled with the high profitability of vegetable production enterprises has made it attractive and indispensable as it creates jobs along the entire crop value chain. This study analysed the efficiency performance of urban vegetable producers and their willingness to pay (WTP) for treated wastewater using data collected from 214 farmers. By applying the data envelopment analysis (DEA) and logistic regression models, the results show that the current production system is technically inefficient as 33% more output could have been produced using the existing resources. The mean amount that farmers are willing to pay for treated wastewater to be delivered to their farms is GH¢66.7 per month. Technical efficiency influences farmers’ WTP for treated waste water. Other drivers of WTP for treated wastewater include experience in vegetable production, type of irrigation practised, source of water used for irrigation, the volume of water applied per day, extension access, association membership, market demand for products, and access to market information. Strengthening public–private partnerships in the treatment and utilization of water resources and providing technical training to urban producers could enhance the efficient use of treated wastewater in agriculture