Guidelines & Tools DeltaSA tool for source apportionment Share SHARE Facebook share Twitter LinkedIn Copy URL Email Download Download https://delta-sa.jrc.ec.europa.eu en Added on: 20 May, 2025 Breadcrumb Home Resource Library DeltaSA Tool For Source Apportionment DeltaSA is an on-line tool to assess source apportionment model outputs in line with the CEN Technical Specification 17458:2020. It works in two different modes. The first is the source chemical profiles similarity test (CPS) accomplished by comparing those obtained by the user with more than one thousand PM10/PM2.5 source measured chemical profiles from the online SPECIATE (US-EPA) and SPECIEUROPE repositories. This configuration is intended to support practitioners in the identification of factors during the execution of factor analytical tools. The second mode consists in a complete test of the model performance (MP) using a testing dataset and reference values generated in the framework of inter-comparison exercises organized by the European Commission- JRC.