Perfluoro (PFAS) is a group of substances that contains PFOS, PFOA and GenX. Perfluoro substances often occur as pollution in ground water and drinking water.

Approximately 79 percent of the nature reserves (Natura 2000 areas) in EU countries are estimated to be exposed to an excess of nitrogen deposition in 2020.

RIVM proposes water quality standards for perfluoro octanoic acid (PFOA). PFOA is a man-made chemical that is used to protect surfaces.