Air Quality Index
The Air Quality Index (AQI) is a tool for reporting daily air quality. It tells you how clean or polluted the air is, and what associated health concerns you should be aware of. The AQI focuses on health effects that can happen within a few hours or days after breathing polluted air. The AQI is reported for five major air pollutants regulated by the Clean Air Act: ground-level ozone, particulate matter, carbon monoxide, sulfur dioxide, and nitrogen dioxide. Useful health information about daily air quality, including near real-time AQI values for continuous ozone and particulate matter monitors, is available via the MIair web page. For a cautionary guide for each range of exposure, view the Health Advisory Chart. To view the corresponding chart of actions that may be needed to protect health as pollution levels increase, please click here.
The Environmental Protection Agency has revised the AQI breakpoints to reflect recent changes to the National Ambient Air Quality Standards for ground-level ozone and fine particulate matter (PM2.5). Currently, daily ozone concentrations above 0.075 ppm, or fine particulate matter concentrations above 35.4 µg/m3, activate the "unhealthy for sensitive groups" category - known to some people as a "code orange" air quality day. When levels reach this category, certain groups should adjust their physical activity to reduce their exposure. These sensitive groups include children and adults who are active outdoors, people with asthma or other lung diseases, and older adults.
The West Michigan Clean Air Coalition is a partnership of businesses, academic institutions, government agencies, industry, and non-profit organizations in Kent, Ottawa, Muskegon, and Kalamazoo counties working together to achieve cleaner air in the region through the education and promotion of voluntary emission reduction activities.
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