The data and resulting data products (tables, figures and maps) available on the indicator web pages can be used freely given that the source is cited. The indicator should be cited as following:
HELCOM (2018) Perfluorooctane sulphonate (PFOS). HELCOM core indicator report. Online. [Date Viewed], [Web link].
Result: Perfluor ooctane sulphonate (PFOS)
Data: Perfluo rooctane sulphonate (PFOS) biota data
Data: Perfluo rooctane sulphonate (PFOS) water data
The data used in the assessment is based on data from the HELCOM COMBINE database to which Contracting Parties report regular monitoring data. The data are extracted based on the HELCOM core indicator extraction table.