1.5 billion litres of grey water have likely been dumped along the B.C. coast: WWF-Canada study | WWF-Canada

1.5 billion litres of grey water have likely been dumped along the B.C. coast: WWF-Canada study

Posted on 13 August 2019
A southern resident Killer whale leaping out of the waters of Haro Strait, British Columbia, Canada
© Natalie Bowes

New study explores potential effects of harmful effluent release in Pacific Ocean

VANCOUVER, August 13, 2019 — A new study commissioned by World Wildlife Fund Canada found that 1.54 billion litres of grey water were generated by ships off the British Columbia coast in 2017 — the equivalent of more than 600 Olympic-size swimming pools. The report found the vast majority of this volume, 1.37 billion litres, came from cruise ships. 
 
Grey water — the drainage from dishwater, galley sinks, and showers — may contain contaminants ranging from grease, oil and flame retardants to disinfectants, fecal coliform and micro-plastics, among other substances. Because of limited storage on vessels, it's common practice for ships of all sizes to discharge greywater into the ocean.
 
“There are several environmental impacts of grey water dumping, including the potential for nutrients in the liquid to foster excessive algal growth, leading to dead zones for aquatic life,” says Andrew Dumbrille, WWF-Canada’s senior specialist, sustainable shipping. “Grey water can also contain oil and grease that suffocates fish by coating their gills, and particulate matter that chokes species like lobster, crab and sponges.”
 
Discharged grey water can potentially impact local ecosystems, especially along coastal areas that are more sensitive to wastewater discharges than the open ocean. Although grey water dumping in inland waters is governed by provincial laws, regulations only cover the area within three nautical miles of the coast. Beyond that, there are no requirements for grey water to be treated or reported when discharged into the oceans.
 
“We urge Transport Canada to put additional regulations in place around grey water dumping. Some companies voluntarily go beyond what is required, but much more is needed across the industry. With 90 per cent of all grey water likely produced on cruise ships, transparency can help customers make a difference by supporting companies that keep ocean health in mind,” says Dumbrille.  
 
Following on WWF-Canada’s 2018 report which found that grey water dumping in the Canadian Arctic would double by 2035, this report uses a similar methodology to highlight common B.C. coastal routes where grey water was likely released.
 
Prepared by Vard Marine Inc., this latest report looked at the types of vessels transiting Canadian waters from Washington to Alaska and took into account the routes, average number of passengers, and average amount of grey water generated.
 
About World Wildlife Fund Canada   
WWF-Canada creates solutions to the environmental challenges that matter most for Canadians. We work in places that are unique and ecologically important, so that nature, wildlife and people thrive together. Because we are all wildlife. For more information, visit wwf.ca.  

For more information contact:
Alexandra del Castello, Communications and media coordinator
adelcastello@wwfcanada.org, 647 264 6996
A southern resident Killer whale leaping out of the waters of Haro Strait, British Columbia, Canada
© Natalie Bowes Enlarge