As a member of the North American Free Trade Agreement, the Mexican Ministry of Environment and Natural Resources publishes the Pollutant Releases and Transfers Registry of Substances annually, in accordance with the Official Mexican Norm Standard NOM-165-Semarnat-2013. This registry comprises 19 datasets (one per year, from 2004 to 2022). These have not preserved the same structure and categorical values, making it difficult to avoid their fusion with other datasets and conduct exploratory studies. These datasets contain (a)data on substances released and transferred to the environment and (b) data on producer facilities. They do not include additional data to make any other kind of query. Users must create adapted versions of these datasets while achieving isolated analyses. This paper describes a method for integrating the Pollutant Release and Transfer Registry dataset, enhanced with facilities data and cancer classification from the International Agency for Research on Cancer, to produce an improved and augmented public data source for academic or research purposes. The obtained database contains geospatial information, which enabled us to analyze the dataset at the state or municipal level to create digital products that can be used to inform decisions about environmental pollution.