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Chelsea Rochman

Chelsea Rochman

In the Media: Department of Ecology & Evolutionary Biology researchers reveal lethal dose of plastics for marine animals

November 19, 2025

We know that consuming plastic can be deadly for ocean wildlife, but how much is too much?

An old worn out sneaker on a pile of plastic garbage.

U of T researchers find high levels of microplastics flowing from Toronto’s Don River into Lake Ontario

October 23, 2025

Researchers at the University of Toronto have found that Toronto’s Don River carries a staggering amount of microplastic pollution into Lake Ontario — over 500 billion particles each year, equal to about 36,000 kilograms, or the weight of 18 cars.

Plastic pollution expert Chelsea Rochman receives 2021 President's Impact Award

March 31, 2021

Fifteen years ago, when Chelsea Rochman was searching for a graduate program that would allow her to study plastic debris and its effect on the environment, she met with resistance, a lack of interest and a lack of opportunities.

A trash-free tomorrow is possible, thanks to PortsToronto and the U of T Trash Team

February 16, 2021

Chelsea Rochman joined the Department of Ecology & Evolutionary Biology in the Faculty of Arts & Science as assistant professor in 2017.

Piles of plastic garbage on the rocky Ascension Island beach

Ecologists sound alarm on plastic pollution

September 17, 2020

Ecologists studying the prevalence of plastic pollution in aquatic ecosystems around the world are concerned after measuring the scale of human response needed to reduce future emissions and manage what’s already floating around out there.

hand taking laundry out of washing machine

U of T researchers examine the effect of microfibres in Toronto’s wastewater: CityNews

November 12, 2019

University of Toronto researchers are looking into the effects of the billions of environmentally harmful microfibres that end up in Toronto’s wastewater system, CityNews reports.

Tiny plastic particles in a jar and in the palm of Chelsea Rochman&#039;s hand

Is there plastic in our drinking water? Probably – and U of T researchers are studying how concerned we should be

July 22, 2019

Is there plastic in your drinking water? The University of Toronto’s Bob Andrews and Chelsea Rochman say there is – but, unfortunately, they don’t have much more information to share.

Microplastics, which are less than five millimetres in size, include pellets from industry, microbeads from personal care products and tire particles from urban runoff.

Sea of troubles: Chelsea Rochman explores how plastic is breaking down - and where it’s ending up

May 01, 2019

When Chelsea Rochman was six years old and a little anxious in the aftermath of her parents’ divorce, she was taken to a child psychologist. The doctor asked: If you could have three wishes, what would they be?

Garbage on the shore of Ward Island in Toronto

Earth Day: Six things you can do right now to help the environment

April 22, 2019

The headlines about the state of the environment make for grim reading.

A woman putting clothes into a washing machine

U of T researchers explore how to prevent flow of harmful microplastics into waterways

February 11, 2019

University of Toronto researchers are tracking the source of tiny pieces of plastic, called microplastics, that are making their way into Canadian waterways – one laundry load at a time.

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We wish to acknowledge this land on which the University of Toronto operates. For thousands of years it has been the traditional land of the Huron-Wendat, the Seneca, and the Mississaugas of the Credit. Today, this meeting place is still the home to many Indigenous people from across Turtle Island and we are grateful to have the opportunity to work on this land. Read about U of T’s Statement of Land Acknowledgement.

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