A "Code Purple" ranges from 201 to 300 AQI index and is considered public health alert. The air quality in this range is "very unhealthy" and the risks of health effects increase for everyone.

Code Maroon is the highest risk level, only appearing when the air is deemed hazardous. When ozone pollution reaches those levels, the EPA recommends that everyone avoid exerting themselves outside.

The tri-state area welcomed summer with sweltering heat, as the first heat wave of the season brought record-breaking ...

ASHLEY. YEAH, ANDREW AND SHANNON, THE DUP SAYS POOR AIR QUALITY CAN CAUSE A NUMBER OF SYMPTOMS, INCLUDING HEADACHES, CHEST PAINS AND EVEN ASTHMA ATTACKS. AND WITH A CODE RED ISSUED, EVERYONE CAN ...

The Air Quality Index in North Carolina is usually Code Green, meaning there are no restrictions for anyone. When pollutants rise into Code Yellow, the U.S. Environmental Protection Agency ...