You don't often see ozone alerts issues in the "red" category, but that's what's going on from Door County south to the IL border right now. The air quality is considered unhealthy for everyone and not just for people in so-called higher-risk categories. Not a good day for outdoor activities.
Advisory for Ozone (Red)
|Start Time:||1:54PM CT Saturday, July 25, 2020|
|End Time:||11:00PM CT Saturday, July 25, 2020|
|Counties:||Door, Kenosha, Kewaunee, Manitowoc, Milwaukee, Ozaukee, Racine, Sheboygan|
AIR QUALITY INDEX CHART
|Air Quality Index|
|Levels of Health Concern||Colors|
|When the AQI|
is in this range:
|...air quality conditions are:||...as symbolized|
by this color:
|0 to 50||Good||Green|
|51 to 100||Moderate||Yellow|
|101 to 150||Unhealthy for|
|151 to 200||Unhealthy||Red|
|201 to 300||Very Unhealthy||Purple|
|301 to 500||Hazardous||Maroon|
For More Information:
What is ozone?
Ozone is a gas composed of three atoms of oxygen. Ozone occurs both in the Earth's upper atmosphere and at ground level. Ozone can be good or bad, depending on where it is found:
Also, the EPA posts this information - and pay attention to the "unhealthy" category, which is red on the chart and covers the WI lakeshore counties. I will italicize it:
When air quality is in this range, people that are included in a sensitive group, whether the sensitivity is due to medical conditions, exposure conditions, or inherent susceptibility, may experience the effects described above when engaged in outdoor activities. However, exposures to ambient concentrations in this range are not likely to result in effects in the general population. For ozone, the sensitive group includes children; people with lung diseases, such as asthma, chronic bronchitis, and emphysema; older adults; and active people who work or exercise outdoors. EPA's risk assessment (Whitfield et al., 1996) indicates that at this level for healthy individuals (adults and children) at moderate exertion: 1) approximately 18% are estimated to experience moderate or greater lung function impairment, 2) approximately 9% are estimated to experience large or greater lung function impairments, and 3) approximately 2% are estimated to experience moderate to severe aggravated cough.
When air quality is in this range, any individual who is active outdoors may experience the respiratory effects described above. Members of sensitive groups are likely to experience more severe effects. EPA's risk assessment (Whitfield et al., 1996) indicates that at this level for healthy individuals (adults and children) at moderate exertion: 1) approximately 30% are estimated to experience moderate or greater lung function impairment, 2) approximately 15% are estimated to experience large or greater lung function impairments, and 3) approximately 5% are estimated to experience moderate to severe respiratory symptoms (i.e., chest pain with deep inspiration and aggravated cough).