Canadian salmon farmers insist farmed salmon is still safe to eat, despite a new study that concludes it contains higher levels of flame retardant chemicals than wild salmon.

Polybrominated diphenyl ethers (PBDEs), found in electronic equipment and other products, have been linked to behaviour and nervous system effects such as impaired learning and memory.

The study found that while most varieties of wild salmon averaged less than one part per billion, PBDEs in farmed salmon were nearly as high as four parts per billion. The B.C. Salmon Farmers Association, Canada’s largest producer of farmed salmon, cited other studies that show household dust contains much higher levels of PBDEs.