EFFECTIVE:  August 23 - 25, 2012

The Evansville Environmental Protection Agency and the Vanderburgh County Health Department have issued an OZONE ALERT for Thursday through Saturday August 23 - 25 because ambient concentrations of ozone may reach or exceed the level of the National Ambient Air Quality Standard (NAAQS) for ozone in the Unhealthy for Sensitive Groups range. 


The current ozone NAAQS was set by the U.S. EPA in 2008 at an eight-hour average of 76 parts per billion (ppb).  Per the Air Quality Index (AQI), eight-hour ozone levels between 76 to 95 ppb are considered to be Unhealthy for Sensitive Groups such as children and active adults, and people with respiratory diseases like asthma.  http://www.epa.gov/airnow/ozone-c.pdf    

Air Quality Index

Ozone 8-hr average

Good (0-50)

0-59 ppb

Moderate (51 – 100)

60-75 ppb

 à   Unhealthy for Sensitive Groups (101 – 150)

76-95 ppb

Unhealthy (151 – 200)

96-115 ppb

Very Unhealthy (201 – 300)

116-374 ppb

HAZARDOUS (301 – 500)

>375 ppb

Within a few hours or days, exposure to higher levels of ozone can cause lung and throat irritation, shortness of breath, increase the frequency of asthma attacks and aggravate respiratory diseases such as asthma, emphysema and bronchitis.  Children, active adults, and people with respiratory diseases should limit prolonged outdoor exertion especially between 12:00 p.m. to 6:00 p.m. when ozone levels may be highest.


When planning outdoor activities, please take precautions, take it slow and stay hydrated.  If you experience symptoms of heat or air pollution related illness, stop what you are doing and take appropriate health and safety measures.  If you experience symptoms such as shortness of breath, chest pains, or an asthma attack, don’t ignore them.  Seek medical advice.  The CDC has an excellent extreme heat prevention guide available here:  http://www.bt.cdc.gov/disasters/extremeheat/heat_guide.asp and information from the National Weather Service can be found at:  http://www.nws.noaa.gov/om/heat/index.shtml



An open burning ban has been in effect for Vanderburgh County since June 20th due to drought conditions (see http://www.in.gov/dhs/files/burn-ban/).  Using gas and charcoal cooking grills is permitted, but we encourage postponing grilling until air quality improves.   



To do your share to protect air quality and reduce pollution levels:

• Use public transit.
• Conserve energy of all kinds – turn off lights; reduce air conditioner use, etc.
• Limit your driving. Avoid unnecessary vehicle idling.
• Park and go inside instead of using drive-through windows, especially if there are long lines.
• Postpone fueling your vehicle until after 6:00 p.m. Don’t ‘top-off’ your tank when filling up.
• Consider using electric or manually operated lawn equipment. Avoid using gasoline powered equipment between 10:00 a.m. and 6:00 p.m.
• Limit the use of solvents, parts cleaning fluids, paint thinners and chemicals. Replace lids when finished.
• Postpone painting or use water-based paints instead of oil-based paints. 

Real-time data, forecasts and more information can be found at:  www.airnow.gov and www.evansvillegov.org/epa

Sign-up for daily air quality forecasts and air quality alert notices at:  http://evansville.enviroflash.info/


Information for Metropolitan Evansville Transportation System (METS): http://www.evansvillegov.org/Index.aspx?page=57

Sign up for “Green” emails and the Sustainable Evansville e-newsletter at: www.evansvillegov.org/seeq
















Last updated: 8/31/2012 12:03:59 PM