The Department of Environmental Protection and its regional air quality partnerships have forecast a code Orange air quality action day for ozone for July 3 in the Pittsburgh and Liberty-Clairton regions.
On air quality action days, young children, the elderly and those with respiratory problems, such as asthma, emphysema and bronchitis, are especially vulnerable to the effects of air pollution and should limit outdoor activities.
The Pittsburgh region is Allegheny, Armstrong, Beaver, Butler, Fayette, Washington and Westmoreland counties. The Liberty-Clairton region – located within southeastern Allegheny County – is the municipalities of Clairton, Glassport, Liberty, Lincoln and Port Vue.
The U.S. Environmental Protection Agency's standardized air quality index uses colors to report daily air quality. Green signifies good; yellow means moderate; orange represents unhealthy pollution levels for sensitive people; and red warns of unhealthy pollution levels for all.
Ground-level ozone, a key component of smog, forms during warm weather when pollution from vehicles, industry, households and power plants "bakes" in the hot sun, making it hard for some people to breathe.
To help keep the air healthy, residents and businesses are encouraged to voluntarily limit certain pollution-producing activities by: Combine errands and reduce trips; Riding the bus or carpooling to work; and Saving energy by turning off unused lights in your home.
These forecasts are provided in conjunction with the Southwest Pennsylvania Air Quality Partnership.
For more information, visit DEP's Air Quality Partnership webpage.