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Email: Carolyn Stevens

Eight-hour ozone exceedences (1990-2007)

Locations and number of times in Virginia when air quality monitors have recorded ozone concentrations greater than 84 parts per billion, the health-based air quality standard measured over eight hours. "ND" indicates that no monitor was present.

Monitor location '90 '91 '92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04 '05 '06 '07
RICHMOND AREA
Charles City County 5 8 3 12 2 6 3 15 17 15 0 6 16 2 1 3 3 3
Chesterfield County 1 1 2 10 3 6 2 8 6 11 2 6 9 3 0 1 2 1
Hanover County 2 3 5 18 7 12 0 15 22 18 ND 8 17 4 0 2 3 1
Henrico County 2 14 4 15 5 5 1 9 13 15 3 10 11 3 0 3 4 4
HAMPTON ROADS
Hampton 4 5 4 10 4 1 2 12 10 12 2 4 14 2 1 0 0 2
Suffolk
Holland
ND 1 4 9 3 4 0 9 5 5 3 0 11 3 0 0 0 0
Suffolk
Tidewater Community College
8 3 7 11 1 3 2 11 10 10 0 4 13 3 1 1 2 2
NORTHERN VIRGINIA
Alexandria 3 6 1 11 6 9 1 5 10 10 2 6 10 3 3 2 3 3
Arlington County 6 20 4 12 8 15 2 17 10 21 3 12 18 4 4 5 5 8
Caroline County ND ND ND 12 1 3 1 7 9 13 2 4 4 3 1 2 5 2
Fairfax County
Annandale
ND ND ND ND ND ND ND ND ND ND ND ND 20 3 4 4 4 2
Fairfax County
Chantilly
ND ND 2 21 5 6 1 1 16 6 2 9 12 2 3 0 2 0
Fairfax County
Franconia
ND ND ND ND ND ND ND ND 14 19 0 14 18 5 5 6 7 4
Fairfax County
McLean
6 10 4 2 5 11 1 3 7 6 2 8 7 3 3 2 6 2
Fairfax County
Mount Vernon
8 24 9 17 5 16 9 6 17 16 4 10 16 5 6 8 6 6
Falls Church 5 26 5 14 12 16 2 10 17 9 2 ND ND ND ND ND ND ND
Fauquier County 2 5 2 6 2 1 2 3 12 9 1 1 3 1 2 0 2 0
Loudoun County ND ND ND ND ND ND ND ND 17 7 1 9 23 3 2 0 2 5
Prince William County ND 9 2 9 1 9 2 4 13 9 2 6 7 4 1 0 4 0
Stafford County ND ND ND 5 3 7 3 9 10 15 2 6 12 4 2 0 5 4

VALLEY AREA

Frederick County ND ND 1 1 2 4 1 4 10 5 2 5 9 1 1 0 1 0
Page County ND ND ND ND ND ND ND ND ND 5 1 6 1 3 0 0 0 0
Rockbridge County ND ND ND ND ND ND ND ND ND 2 0 1 0 0 0 0 0 0

Shenandoah
National Park


Big Meadows

4 3 1 2 2 9 1 6 22 15 1 8 6 6 1 0 0 0

ROANOKE AREA

Roanoke County 0 2 0 2 2 2 0 2 13 6 2 5 5 1 0 0 0 1

SOUTHWESTERN VIRGINIA

Wythe County 3 0 0 3 3 1 0 1 6 4 2 1 6 2 0 0 0 0
  '90 '91 '92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04 '05 '06 '07