Air quality across the southern two-thirds of Minnesota is expected to hit marginal or even unsafe conditions this week thanks to a stagnant air mass.
The Minnesota Pollution Control Agency has issued an air pollution health advisory through Friday for the southern two-thirds of the state due to elevated levels of fine particulates.
Light winds from the south could blow additional pollution into the state, but aren't strong enough to disperse pollution that's here, the PCA said.
Duluth, Brainerd and St. Cloud air monitoring sites are expected to see air quality index levels as high as 90, considered marginal.
Rochester's reading already hit 103 early Tuesday and levels in the Twin Cities could climb above 100 today.
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Air quality index levels over 90 are considered unhealthy for sensitive groups with respiratory, cardiovascular and heart conditions, as well as senior citizens, children and physically active adults. Levels over 150 are considered unhealthy for all people.
Fine particle pollution comes from burning fossil fuels like gas, oil and coal in vehicles and electrical production and from wood smoke.
Sensitive groups should avoid vigorous or prolonged exercise outdoors and indoors. Others, including athletes and other healthy adults should consider reducing or postponing heavy exertion outside.
To help reduce the problem, the PCA suggests reducing driving, don't burn fires in the fireplace, don't run small en-gines if possible and reduce electricity use.
For more information go to http://aqi.pca.state.mn.us/ .
