Study finds Vancouver-area laundry microplastics are filtering into ocean

Study finds Vancouver-area laundry microplastics are filtering into ocean

VANCOUVER — Microplastics from Metro Vancouver’s laundered clothes are ending up in water treatment plants and filtering into the ocean, says a study published in the science journal Marine Pollution Bulletin.

The study by the ocean-protection group Ocean Wise and the Metro Vancouver regional district found that while up to 99 per cent of the particles were filtered out, a significant amount still made it into the ocean.

The study, believed to be the first of its kind in Canada, found Vancouver-area treatment plants remove about 1.8 trillion plastic particles in waste water each year, but 30 billion particles are still released into the ocean.

Peter Ross, the study’s principal investigator and vice-president of research at Ocean Wise, said many of the microplastics are in the form of fibres from polyester and rayon clothing.

“Both those numbers are high and really point to the need for us to track these particles back to their sources more coherently,” he said in an interview on Thursday.

“But that doesn’t give us an excuse to ignore the evidence that we have thus far. The evidence is that a large number of microplastic particles are heading into waste-water treatment plants in Vancouver.

“Most of those, 71 per cent are fibres, 29 per cent are other things like polystyrene beads or microbeads from toothpaste and facial scrubs or little fragments of mystery particles.”

Ross said microplastics are also coming from light industry, small business and other sources. He pointed out one study in Europe that found tire wear from vehicles was producing tiny beads of plastic that were going into the ocean.

Other research has shown that microplastics in the ocean are being mistaken for food by zooplankton and fish, which raises concerns about the impact on their health, he said.

The consequences for animal life are unclear, but the microplastics being ingested “underscores the potential for serious impacts at the bottom of the food chain,” the study concludes.

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