Code Orange Bad Air Monday and Tuesday, July 11-12


Worst air this week predicted in southern Delaware.
Official Code Orange (really Code Red) Monday and Tuesday.
Official Code Yellow Wednesday and Thursday.
Heat Advisory also in effect
EnviroFlash Fact Sheet
The allergen (pollen) forecast is “Medium”


From the State of Delaware (DNREC):

Code Orange Levels of Ozone Forecasted for Monday, July 11th

Monday is an Air Quality Action Day!

Hot and humid on Monday with ozone expected to reach Code Orange levels, with highest concentrations in northern Delaware. Particulate matter concentrations will remain within the moderate range (Code Yellow).

You can view near real-time monitoring data from Delaware�s numerous ambient monitors at the following website:

For more information about the air quality alerts and what you can do to reduce air pollution, check out the following website:

A Code Orange air quality forecast for ozone is a level of pollution that can be unhealthy for sensitive groups, such as young children, the elderly, and those with heart and/or respiratory conditions. Such persons should limit outdoor activities, especially those that require a high level of exertion.

From another source:

State of Delaware Air Quality Forecast for:
Tuesday, July 12, 2011

(New Castle County including City of Wilmington)

Fine Particles (PM2.5): CODE YELLOW (MODERATE)

(Kent and Sussex Counties including City of Dover)

Fine Particles (PM2.5): CODE YELLOW (MODERATE)


Very hot and humid on Tuesday with winds becoming westerly.  Morning clouds will limit ozone accumulation early in the day but afternoon sun will allow scattered locations east of I-95 to reach the Code Orange range.  Highest concentrations are likely to occur over southern Delaware as it will be directly downwind of the I-95 Corridor.  Particle concentrations will drop slightly due to strong winds but remain within the moderate range.

A cooler and drier air mass will filter across the state during Wednesday and be firmly in place by Thursday.  Sunny skies and a long day length will allow ozone to reach the moderate range on both days with highest concentrations again over southern Delaware.  The drier and cleaner air mass will drop particles to the good range.


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