
High in the sky, ozone protects us from the sun. But down on the ground, ozone pollution harms the health of everyone, especially kids and the elderly.
Ozone pollution harms people’s health.
Ozone pollution causes or aggravates some of the same respiratory diseases as smoking tobacco, like:
Ozone pollution is also responsible for thousands of premature deaths in the US each year.
Ozone pollution is especially harmful in parts of Wisconsin.
In 2018, the American Lung Association gave eight Wisconsin counties “F” rating for air quality, based on EPA data from 2014-2016.
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Door
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Kenosha
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Manitowoc
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Milwaukee
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Ozaukee
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Rock
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Sheboygan
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Walworth
How can I know if ozone levels are unsafe?

The EPA has a Air Quality Index (AQI) to measure daily air quality and inform the public about how it might affect people’s health.
Ozone alert days are issued when the AQI value for ozone is above 100, or level orange.
The guide to the left is a helpful tool for protecting you and your family from unsafe ozone levels.
You can also sign up for email alerts or download the free AirNow app to get alerts straight to your phone.
Our health would benefit from less ozone pollution.
The EPA estimates that in the U.S., reducing ozone pollution to 70 parts per billion would prevent upwards of:
Asthma Attacks in children
Missed school days
Premature Deaths
cases of chronic bronchitis in children
asthma-related ER visits
But EPA is failing to protect our health from ozone pollution.
The science is clear: many places in Wisconsin have ozone pollution that harms our health.
But instead of reducing ozone pollution in these areas, EPA is allowing new polluters to add high levels of ozone pollution to our air, unchecked.
This threatens the health and wellbeing of thousands of Wisconsinites.
Instead of healthier air, we’re left breathing pollution that is linked to serious health issues and higher rates of premature death.
The EPA must protect Wisconsin’s kids, families, and communities from harmful ozone pollution.
Join the movement.
Tell friends and family
Share our factsheet with others and inform them about how ozone pollution affects our health.
Share with Friends
Share our page on social media, and spread the word with friends about ozone pollution.
Support our work
Give a gift of any amount to bolster our efforts to protect Wisconsin’s air, kids, families, and communities.
Get Ozone Alerts
Download the AirNow App from the EPA to get alerts about ozone pollution levels in your area.