The shaded areas below show the places that have the most bad ozone days. Winds push airborne chemicals that cause ozone toward Tarrant and Denton counties.

Click on the gray squares (air monitoring stations) for local air quality information.

MAP KEY Air quality monitors. Numbers in the boxes show the average annual number of high ozone days, 2005-07. 25(+) bad smog days 20-25 bad smog days 15-20 bad smog days