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Currently, there are more and more requests for a characterization of the health profile by populations living in areas affected by several types of environmental contaminations, notably for the presence of previously unknown and accidentally discovered landfills. The aim of the present paper is to describe the mortality profile of the residents of Piazzola sul Brenta (Veneto Region, Northern Italy). In this area, it was discovered an environmental contamination of the soil in the nearby of a large school building, where was formerly located a phosphate fertiliser plant. Using cause of death data provided by the Italian National Institute of Health, 10th International Classification 2013-2018, standardised mortality ratios (SMRs) and 90% confidence intervals (CIs) were calculated by gender and specific causes of death. Compared to the provincial reference population, no excess was found, for both genders, for all-causes mortality and for circulatory diseases. However, an excess for malignant tumours was found, 523 observed deaths over 498 expected deaths, an SMR of 105 (IC90% 98-113), and 85% probability of excess cancer mortality; lung cancer (SMR 117; IC90% 100-135) and lympho-hematopoietic tumours (in men only, SMR 134; IC90% 101-178).In light of these results and of the potential human exposure to carcinogenic substances, present results support further epidemiological investigations and environmental remediation.