Why is air quality forecast to be so bad in Chicago and parts of Illinois? Here’s what’s happening
Why is air quality forecast so bad in Chicago and parts of Illinois? Here's what's happening NBC Chicago
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Chicago Air Quality Alert Sparks Environmental Protection Agency Alert
An air quality alert has been issued for Chicago and parts of Illinois, prompting a response from the Environmental Protection Agency (EPA). The alert, which remains in effect until midnight Tuesday, was declared by the EPA in Illinois due to elevated ground-level ozone. The alert is part of efforts to address air pollution and improve air quality in the region.
Where has an air quality alert been issued?
- Cook
- DuPage
- Kane
- Kendall
- Grundy
- Lake
- McHenry
- Will counties
What is an Air Pollution Action Day?
An Air Pollution Action Day is declared when weather conditions are expected to result in widespread ozone and/or particulate levels that are at or above the Unhealthy for Sensitive Groups category of the air quality index for multiple days. In Illinois, an Air Pollution Action Day is issued when air quality is forecasted to be at or above the Orange or “Unhealthy/Sensitive Groups” category for two or more consecutive days. On these days, individuals with pulmonary or respiratory diseases such as asthma are advised to limit outdoor activities.
Why is the air quality so bad?
The air quality in Chicago and parts of Illinois is impacted by two major factors: ground-level ozone and particulate matter (PM2.5). Ground-level ozone is expected to be the largest issue for the region, although PM2.5 levels were reported as the worst pollutant. Ground-level ozone forms as a result of chemical reactions between nitrogen oxides and volatile organic compounds emitted from vehicles, power plants, and industrial sources, which then react with sunlight. Particulate matter refers to a mixture of solid particles and liquid droplets found in the air, including dust, dirt, soot, or smoke.
How bad is the air quality?
As of 6 a.m., Monday, the Air Quality Index (AQI) in the Chicago area was measured as “Moderate,” but it is expected to reach “Unhealthy for Sensitive Groups” later in the day. The AQI is measured based on five major air pollutants, including ground-level ozone and particle pollution. Those with pulmonary illnesses and other risk factors are advised to reduce outdoor exposure during the alert.
How to check air quality in your area
To check the air quality level in your area, visit the AirNow website.
What is an unhealthy air quality level?
The Air Quality Index (AQI) determines the level of air pollution and the corresponding health concerns. When AQI values are above 100, air quality is considered unhealthy. Once levels reach above 300, they enter the highest level of concern known as “hazardous.”
Chicago weather today: Temperatures will feel like 100 degrees
In addition to the air quality alert, Monday is expected to be a hot and muggy day in Chicago, with temperatures reaching 96 degrees. Humidity levels will be high, and there is a chance of isolated afternoon storms. It is important to stay hydrated and take precautions to protect against heat-related illnesses.
Source: nbcchicago.com
