The system of informal waste collectors and aggregators in Da Nang city (Vietnam) was surveyed in the framework of the COMPOSE project (2019-2021). The social survey based on questionnaire was carried out in the entire area of Da Nang city to identify the location of the aggregator warehouse participating to the informal waste collection and recycling in the city. Then, the collectors and aggregators were interviewed to collect information on the space, architectural characteristic of the warehouse, the neighborhood, the hours of operation, the type of materials collected and on the owners of the warehouse (hometown, the reasons for choosing the job). The surveys were conducted in August 2019 and June 2020. Data anonymization was performed by removing identifiers, generalization (grouping precise values into less precise/larger categories) and finally by aggregating individual records, producing descriptive statistics (frequencies).