(Pittsburgh) -- An air pollution alert is in effect for the midstate and four other Pennsylvania regions.
The Department of Environmental Protection says a Code Orange ozone alert is in effect today for the south central Pennsylvania, the Lehigh Valley, the Liberty-Clairton area, Pittsburgh and Mercer County.
Young children, the elderly and those with respiratory problems such as asthma should limit outdoor activities.
Ground-level ozone, or smog, forms during warm weather when pollution from vehicles, power plants and other sources heats up, making it hard for some people to breathe.
The alert system uses colors to report air quality. Green signifies good; yellow is moderate; orange means unhealthy pollution levels for sensitive people; and red warns of unhealthy pollution levels for everyone.
Published in Newsback to top
Support for WITF is provided by:
Support for witf is provided by: