Ozone Watch-Warning System |
Ozone Color Levels
Color & Level (ppb)
|
Actions to Protect Your Health |
Air Quality |
0 to 79 |
None necessary. |
good |
80 to 89 |
Unusually sensitive people should consider limiting prolonged outdoor exertion. |
moderate |
90 to 114 |
Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion. |
unhealthy for sensitive groups |
115 to 139 |
Active children and adults, and people with respiratory disease, such as asthma, should avoid prolonged exertion; everyone else, especially children, should limit prolonged outdoor exertion. |
unhealthy |
140 to 300 |
Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion. |
very unhealthy |
Key to Highlight Colors
Ozone values in the table above are color-coded to match the ozone warning levels for the Dallas-Fort Worth region. Ozone levels have been mapped to colors based on a projected eight-hour average calculated from the measured one-hour levels. For other areas of the state, ozone levels have been mapped to colors based on the one-hour Air Quality Index (AQI) standard for ozone.
The TCEQ and NCTCOG in Dallas/Fort Worth area, along with local partners, will publicize and issue Air Pollution Warnings. The Warnings will go beyond the former Ozone Action Day notice, which predicted when ozone levels might exceed federal standards, as a prevention measure. TCEQ will now make public notification via e-mail when pollution levels are determined to meet the Environmental Protection Agency’s criteria for possible health risks. The process will use standard weather terms:
An "Air Pollution Watch" will be issued for a day predicted to be a public health risk. If air pollution levels actually reach unhealthy levels based on monitor readings, the TCEQ will automatically issue an "Air Pollution Warning" via e-mail from their Austin headquarters to local authorities, news organizations, and interested citizens within approximately 30 minutes after ozone measurements reach unhealthy levels.
TCEQ Links
Federal Links
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