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york city saw the worst air quality on record yesterday. the air quality index reading we maxed out at 436 breaking the old record in 1981 of 279. not only did we break the record we smashed it. not a record we want to be breaking. today where we re dealing with the worst air quality. much of state of the pennsylvania, new jersey. we re taking into account the smoke from the wildfires as well as that ground level ozone. a lot of pollutants are in the atmosphere and why it will be dangerous for spending time outdoors. numerous air quality alert. tens of millions of us under air quality alerts. they will be reissued tomorrow as well. visibility is a major concern. two miles in new york city. barely three miles.
Also known as tropospheric ozone, ground-level ozone is “a colourless and highly irritating gas that forms just above the Earth's surface (up to 2 miles above the ground),” as per Environment and Climate Change Canada (ECCC). Notably, it’s not directly emitted into the air but rather produced when two primary pollutants react in sunlight and stagnant air.