European Chemicals Agency (ECHA) issued a report that "found no reason to advise people against playing sports on synthetic turf containing recycled rubber granules as infill material."

SBR rubber granulate has been the subject of vociferous speculation regarding its potential toxicity to soccer players using artificial pitches containing this infill  

SBR rubber granulate has been the subject of vociferous speculation regarding its potential toxicity to soccer players using artificial pitches containing this infill  

In June 2016, the European Commission asked the ECHA to evaluate any risk to the general population, including children, professional players and workers installing or maintaining the fields from synthetic turf fields with recycled rubber infill. The ECHA's advice is based on their evaluation that there is "a very low level of concern from exposure to substances found in the granules."

The ECHA found that the concern for players and workers for lifetime cancer is very low, for metals is negligible and for phthalates, benzothiazole and methyl isobutyl ketone there are no concerns. The ECHA also noted that their conclusions are consistent with those found in the recent Dutch RIVM and Washington State studies. 

A copy of the report can be found here: https://echa.europa.eu/documents/10162/13563/annex-xv_report_rubber_granules_en.pdf/dbcb4ee6-1c65-af35-7a18-f6ac1ac29fe4