Thursday, January 9, 2014

Dirty Air Alerts For Five WI Counties Through Tomorrow Evening


Current Wisconsin statewide air quality notices

 1 Active Air Quality Notice
  1. Air Quality Advisory for Particle Pollution (Orange)
    Issued: 10:25 am CT Thursday, January 9, 2014
    Start Time:10:30 am CT Thursday, January 9, 2014
    End Time:6:00 am CT Friday, January 10, 2014
    Counties:Dane, Kenosha, Milwaukee, Racine, Waukesha
Current Air Quality Status County Selection Form
Select a county to view its Air Quality status:
The DNR uses weather forecasts and data from air monitoring sites to determine air quality in the state and notifies residents when pollutants reach unhealthy levels based on the Air Quality Index (AQI) [exit DNR]. The AQI includes two pollutants that can cause health problems in humans - ozoneand particle pollution.
To protect public health, the DNR may issue an advisory even though pollutant levels at some locations have not yet reached unhealthy levels. Forecasters evaluate weather conditions and typically issue an advisory when pollutant levels are rising and at least one monitor has exceeded the standard.

How AQI ranges correspond to ozone and fine particle (PM2.5) concentrations

The ozone AQI is calculated from 8-hour rolling average concentrations. The PM2.5 AQI is calculated using the 24-hour rolling average concentrations from the continuous monitors.
Color coded chart showing ozone and fine particle concentration ranges for each AQI level
AQI Levels
of Health Concern		Numerical Value8-hr Ozone (ppb)24-hr PM2.5 (ug/m3)
Good0-500-590.0 to 12.0
Moderate51-10060-7512.1 to 35.4
Unhealthy for Sensitive Groups101-15076-9535.5 to 55.4
Unhealthy151-20096-11555.5 to 140.4
Very Unhealthy201-300116-374140.5 to 210.4
Hazardous> 300> 374> 210.4
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