The state Department of Energy & Environmental Protection (DEEP) has issued an air quality alert for Friday, saying that air is expected to be unhealthy for sensitive groups.
"Unhealthy for Sensitive Groups" means the air quality index (AQI) in Madison will be between 101 - 150.
Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air.
The AQI in Madison Friday is expected to be 116.
AirNow, developed by the US Department of Environmental Protection, along with other agencies, says the air quality index (AQI) has been developed to give people a sense of how air quality can affect health:
The AQI is an index for reporting daily air quality. It tells you how clean or polluted your air is, and what associated health effects might be a concern for you. The AQI focuses on health effects you may experience within a few hours or days after breathing polluted air. EPA calculates the AQI for five major air pollutants regulated by the Clean Air Act: ground-level ozone, particle pollution (also known as particulate matter), carbon monoxide, sulfur dioxide, and nitrogen dioxide. For each of these pollutants, EPA has established national air quality standards to protect public health .Ground-level ozone and airborne particles are the two pollutants that pose the greatest threat to human health in this country.