Ozone does not naturally occur at harmful levels in the troposphere. Our ground-level ozone problems are caused by human activities. Unfortunately, we can t simply pump our extra ozone into the stratosphere. So, to keep it from causing problems down here in the troposphere, we have to stop it from forming in the first place. Days in Wisconsin only occur in the summer.
Day is a day when ground-level ozone has the potential to reach unhealthy levels.
On these days, everyone needs to take action to stop this from happening. By not using products or participating in activities that emit VOCs and NOx, you can help make sure that less of those chemicals are released to bake in the summer sun. If fewer chemicals are allowed to bake, then less ground-level ozone will be created. The Clean Air Act is a national law that sets up rules about keeping our air clean. One of those rules states that ground level ozone must not reach unhealthy levels.