Ontario’s air quality among most ‘unhealthy’ in Canada right now — Here’s where it’s the worst Downtown Ottawa, Belleville and London had the worst air, according to Ontario’s Air Quality Health Index ...

London's air quality is at high risk levels for people with respiratory issues as smoke from forest fires in northern Ontario and Quebec continue to hang over the region.

Wildfire smoke blowing into Ontario has dropped air quality to poor levels, ... rivalling the GTA's record-lowest average AQI over a 24-hour period and breaking that very record in London. ...

A heat warning remains in effect for Sunday across much of Ontario, including the southern regions, with Environment Canada ...

As of Tuesday afternoon, 29 Ontario locales have been issued air quality warnings or special weather statements from Environment Canada due to the deteriorating conditions.

London’s decision to expand a low-emission zone has led to lower air pollution without impacting business footfall or spending, according to a report released by the mayor’s office.

Wildfire smoke blowing into Ontario has dropped air quality to poor levels, but conditions will finally improve come Sunday as a centre of high pressure moves east. ... rivalling the GTA's ...

Wildfire smoke blowing into Ontario has dropped air quality to poor levels, but conditions will finally improve come Sunday as a centre of high pressure moves east Prolific smoke that’s blown ...

Prolific smoke that’s blown across North America and beyond over the past couple of weeks will bring reduced air quality to southern Ontario through Saturday, with an improvement expected on Sunday..