AIR QUALITY ALERT IS IN EFFECT FOR Thursday JULY 9... The Pennsylvania Department of Environmental Protection has issued a code ORANGE air quality alert for Thursday in Liberty/Clairton. A code ORANGE air quality alert means that air pollution concentrations within the region may become unhealthy for sensitive groups. Sensitive groups include children, the elderly, and people suffering from asthma, heart disease, or other lung diseases. The effects of air pollution can be minimized by avoiding outdoor exercise or strenuous activity. For more information on ground-level ozone and fine particles, visit http://www.airnow.gov and http://www.aqpartners.state.pa.us