Northern Alberta Institute of Technology

What to know about air quality in Edmonton - and what to do when it's bad

What you're seeing is what you're breathing

On most days in Edmonton, you can see for kilometres in any direction. From NAIT, for example, there’s usually an unobstructed view of downtown, just under three km to the south, and of the Pearl, the city’s tallest residential building, just over four km west.

On some summer days, however, all of that disappears under a cloud of pollutants. Sometimes it's wildfire smoke, but sometimes it's actually smog. That miasma is an eyesore but, worse, it can be trouble for our lungs.

“Outside of the [occasional smoke from] forest fires, the air quality in Edmonton is under a lot of scrutiny,” says the Respiratory Therapy instructor Graham Werstiuk (Respiratory Therapy ’06).

At times, the air quality in Alberta's capital is worse than in Toronto, a city with nearly three times the population.

How do we protect ourselves against pollutants we can see and those we can’t? Here, Werstiuk offers tips on how to breathe easy.

Know what’s in the air

vehicle exhaust pipe air quality

There’s nearly one vehicle registration for every person – of every age – in Alberta. In 2016, more than 82% of us commuted to work via personal transportation.

“If there’s not a lot of wind, that traffic pollution just sits there,” says Werstiuk.

Vehicle pollution, combined with emissions from homes and heavy industry, is the reason local organizations constantly monitor air quality.

Environment Canada includes the Air Quality Health Index as part of forecasts for many Canadian cities that may experience similar or worse situations. This 1-to-10 scale (it goes higher in extreme conditions) measures ozone, nitrogen dioxide and fine particulate matter, which can float in from a fire.

“[It’s] pegged to the expected health outcomes,” says Werstiuk; the higher it goes, the greater the irritation.

The short and long-term effects

Werstiuk divides the impact of poor air quality into short- and long-term effects.

A relatively healthy person will know they’ve had their fill of polluted air by the onset of headaches, coughing, sneezing, runny nose, irritated eyes and shortness of breath during more intense physical activity.

The effects can be far worse for people with chronic lung diseases (like asthma) and cardiovascular conditions.

“Irritation can trigger an attack and increased susceptibility to infection,” says Werstiuk. “For some of these patients, every infection carries a high risk of mortality.”

The effects can be far worse for people with chronic lung diseases.

Long-term effects may prove dangerous to the general population as well. A study published in 2012 in the Canadian Medical Association Journal estimates that roughly two to six per cent of lung cancers in Alberta are attributed to particulate matter air pollution, Werstiuk notes.

“What about these low levels we’re exposed to all the time?” he asks. “Are they causing problems as well?”

Take action

When the Air Quality Health Index begins to creep past the halfway mark, “in general, limiting exposure is the way to go,” says Werstiuk.

Particularly when wildfire smoke is present, he recommends that people follow guidelines set out by the ministry of Environment and Climate Change, including:

  • “Reduce your activity,” he says. Save the big run for another day. “If you’re breathing heavily, you’re allowing more exposure”
  • Set your vehicle ventilation system to recirculate interior air
  • Keep the windows closed at home and try to reduce the use of the furnace or air conditioner, which draw in outside air
  • Limit exposure for children, who breathe faster than adults
  • Monitor those with health issues. “There is a small but significant correlation between high air pollution days and admissions for heart attacks and stroke,” says Werstiuk
     

Taking action can also involve conversations and personal choices, he adds. Can we develop and enact policies to address everyday pollutants, not just those generated by occasional wildfires? Werstiuk wonders. Can we make decisions that will reduce automobile emissions and help keep the air not just clear but truly clean?

“What are all the things we can do so we can go out and enjoy the outdoors like we should?”

Can masks help?

N95 air respiratory maskAs protection against fine particulate matter that comes from wildfires, the answer is yes and no, says Graham Werstiuk, Respiratory Therapy instructor. Common surgical or simple paper masks don’t help, as they’re design to guard against droplets.

An N95 mask, which covers the nose and mouth, can help when used properly.

“They’re intended to fit tight to the face,” says Werstiuk. “You should be passing all the air in and out through the mask, not escaping out the side.”

Available at your local hardware store, N95 masks are designed to block 95% of very small particles.

 


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