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Smog Season 2010 Wraps Up
On October 31st, HCDOES will conclude monitoring for ozone in the four-county region for the remainder of the year. Although “Smog Season” typically finishes at the end of October, there is still a possibility the region could experience a Smog Alert in the winter months due to high particulate levels. Below is a recap of the Smog Alert activity for the past season. For more information about Smog Alerts, please visit www.hcdoes.org or contact Sarah Dowers at (513) 946-7748.

Smog Season History
The following is a breakdown of the smog-related activities for Butler, Clermont, Hamilton and Warren counties in Ohio and Boone, Campbell and Kenton counties in Kentucky, updated on September 20, 2010.

Date

Number of Smog Alerts Issued

Number of Day Smog Alert in Effect

Number of
1-Hour Ozone Exceedances

Number of
8-Hour Ozone Exceedances

Number of PM2.5 Readings Over 35 ug/m3
(24-Hour Average)

1995

9

19

9

76

-

1996

7

12

3

52

-

1997

5

10

3

40

-

1998

9

25

4

77

-

1999

7

27

3

83

-

2000

1

2

0

25

-

2001

4

9

1

24

-

2002

6

18

5

109

17

2003

1

2

2

36

22

2004

0

0

0

5

13

2005

3

8

1

40

38

2006

0

0

0

10

35

2007

6

24

0

38

32

2008

5

10

0

46

6

2009

2

3

0

15

2

2010

9

25

0

49

4

© 2010 Hamilton County Department of Environmental Services | 250 William Howard Taft Road, Cincinnati, OH 45219
Information on this site is believed to be true and accurate. Hamilton County disclaims any liability for errors or omissions.
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