Interactive Map
Testing the limits
Pollution in arenas
The CBC conducted pollution spot-checks in 42 hockey arenas in five Canadian cities to determine the levels of ultrafine particulate air pollution.
There are no health standards for this type of pollution, but studies have shown that exposure to high levels of ultrafine particulate matter is linked to a decrease in lung function."
The red line on the graphs, at 60,000 particulates per cubic centimetre, indicates
the level of concern for chronic exposure for children in hockey arenas, according
to Kenneth W. Rundell, director of the human performance lab at Marywood University.
The peak level for a typical indoor office environment is 10,000 particles/cu
cm, according to the manufacturer of the testing device used in our spot checks.
Environment Canada indicates levels 20 metres from the side of Ontario's Highway
401 at Toronto — the country's busiest — peak at approximately 130,000 particles/cu
cm.
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