The European Union could require the use of less contaminated bits of shredded rubber in artificial turf on recreational fields and arenas.

The cumulative presence of eight carcinogenic polycyclic-aromatic hydrocarbons (PAH) in shredded rubber should be limited to 20 milligrams per kilogram in artificial turf and other surfaces, such as children’s playgrounds, the European Chemicals Agency‘s risk assessment committee said in a June 18 opinion.

Polycyclic-aromatic hydrocarbons—a group of more than 100 chemicals—are present in shredded vehicle tires, which are the main source of granulated recycled rubber for indoor and outdoor playing fields.

The 20mg/kg...