*** FINAL DATA ***

 

2007          1-Hour Ozone          (updated through September 30, 2007)

 

AQS Number

 

Site Name

1st Max

1-Hour

(ppm)

Date 1st  Max

1-Hour

2nd Max

  1-Hour

(ppm)

Date 2nd Max

1-Hour

3rd Max

1-Hour

(ppm)

Date 3rd Max

1-Hour

4th Max

1-Hour

(ppm)

Date 4th Max

1-Hour

5th Max

1-Hour

(ppm)

Date 5th Max

1-Hour

08-001-3001

Welby

0.098

07/31

0.090

06/29

0.090

07/01

0.088

07/09

0.086

07/21

08-005-0002

Highland

0.090

07/09

0.087

07/02

0.084

07/31

0.083

07/11

0.081

08/14

08-013-0011

S. Boulder Creek

0.104

08/25

0.102

07/02

0.098

07/09

0.094

07/01

0.094

07/31

08-031-0002

CAMP

0.084

07/21

0.080

07/01

0.073

08/25

0.070

08/05

0.069

07/08

08-031-0014

Carriage

0.097

07/01

0.097

07/21

0.095

06/29

0.089

07/09

0.089

08/14

08-035-0004

Chatfield State Park

0.105

07/31

0.100

07/27

0.099

08/25

0.094

07/21

0.094

07/25

08-041-0013

Colo. Spgs. - Academy

0.080

07/13

0.079

08/14

0.079

08/15

0.078

04/19

0.078

07/09

08-041-0016

Manitou Springs

0.084

07/13

0.084

07/31

0.083

08/06

0.082

04/19

0.082

07/19

08-059-0002

Arvada

0.095

07/09

0.095

07/31

0.092

07/20

0.091

08/25

0.089

06/29

08-059-0005

Welch

0.098

07/25

0.095

07/01

0.094

08/16

0.093

07/02

0.093

07/21

08-059-0006

Rocky Flats - N

0.108

07/09

0.108

07/31

0.107

06/30

0.101

07/20

0.101

08/25

08-059-0011

NREL

0.104

08/25

0.100

07/01

0.099

07/09

0.097

06/30

0.095

07/31

08-069-0011

Ft. Collins West

0.107

07/01

0.106

06/30

0.102

07/09

0.097

06/24

0.096

07/30

08-069-1004

Ft. Collins

0.092

06/30

0.090

07/01

0.086

06/24

0.083

06/06

0.083

07/09

08-123-0009

Greeley - Weld Tower

0.095

06/30

0.093

06/24

0.090

07/22

0.090

08/31

0.089

06/25

 

 

2007          8-Hour Ozone          (updated through September 30, 2007)

 

AQS Number

 

Site Name

1st Max

8-Hour

(ppm)

Date 1st  Max

8-Hour

2nd Max

  8-Hour

(ppm)

Date 2nd Max

8-Hour

3rd Max

8-Hour

(ppm)

Date 3rd Max

8-Hour

4th Max

8-Hour

(ppm)

Date 4th Max

8-Hour

5th Max

8-Hour

(ppm)

Date 5th Max

8-Hour

08-001-3001

Welby

0.086

07/31

0.078

07/09

0.072

07/21

0.070

06/15

0.070

06/30

08-005-0002

Highland

0.083

07/09

0.079

07/02

0.075

06/30

0.075

07/31

0.073

05/13

08-013-0011

S. Boulder Creek

0.088

07/09

0.086

07/02

0.085

07/01

0.085

07/20

0.085

07/31

08-031-0002

CAMP

0.064

07/21

0.058

07/01

0.057

07/09

0.057

07/29

0.056

06/23

08-031-0014

Carriage

0.081

07/09

0.079

07/21

0.077

07/31

0.076

06/29

0.075

07/20

08-035-0004

Chatfield State Park

0.087

07/31

0.085

08/25

0.083

07/09

0.082

07/21

0.080

07/02

08-041-0013

Colo. Spgs. - Academy

0.076

04/19

0.073

07/13

0.072

07/09

0.072

07/31

0.071

08/14

08-041-0016

Manitou Springs

0.079

04/19

0.075

07/13

0.074

07/09

0.072

03/28

0.072

05/13

08-059-0002

Arvada

0.084

07/09

0.080

07/31

0.079

07/02

0.079

07/20

0.076

06/30

08-059-0005

Welch

0.085

07/09

0.082

06/30

0.082

07/21

0.080

07/02

0.078

07/20

08-059-0006

Rocky Flats - N

0.098

07/09

0.095

08/25

0.094

07/31

0.090

06/30

0.088

07/02

08-059-0011

NREL

0.090

07/09

0.085

06/30

0.085

07/02

0.085

08/25

0.084

07/31

08-069-0011

Ft. Collins West

0.088

07/09

0.087

06/30

0.085

07/02

0.085

07/30

0.084

07/31

08-069-1004

Ft. Collins

0.073

06/30

0.073

07/09

0.071

07/01

0.069

06/24

0.069

07/02

08-123-0009

Greeley - Weld Tower

0.076

08/16

0.075

07/21

0.074

06/24

0.074

06/30

0.074

08/17

 

(NOTE: Values at or above the level of either the former 1-hour standard (0.125 ppm) or current 8-hour standard (0.085 ppm) are highlighted in yellow.)

(NOTE: Values above the allowable 3-year average 4th-maximum 8-hour value are highlighted in red. These are violations of the current 8-hour standard.)


 

 

 

The 8-hour ozone standard is written such that attainment is met if the 3-year average of the 4th maximum value from each of the 3 years is less than 0.085 ppm. Thus, by looking at the 4th maximum values from the previous 2 years, it is possible to see what the highest 4th maximum level for the current year could be and still remain in attainment of the standard.

 

This table provides information on the 3-year status of sites through 2006 as well as the maximum possible level for 2007 in order to remain in attainment of the proposed standard. The table also provides the current 4th maximum value for 2007.

3-Year Average 4th Maximum Ozone Values

 

 

 

Site Name

 

 

 

AQS #

2005

4th Maximum

8-Hour Average

Value (ppm)

2006

4th Maximum

8-Hour Average

Value (ppm)

2007 (thru 8/31)

4th Maximum

8-Hour Average

Value (ppm)

2005 - 2007

3-Year Average

4th Maximum

Value (ppm)

2007

Highest Allowable

4th Maximum

8-Hour Average

Value (ppm)

Welby

08-001-3001

0.073

0.069

0.070

0.070

0.112

Highland

08-005-0002

0.080

0.081

0.075

0.078

0.093

S. Boulder Creek

08-013-0011

0.076

0.082

0.085

0.081

0.096

Denver – CAMP

08-031-0002

0.051

0.062

0.057

0.056

0.141

Carriage

08-031-0014

0.074

0.072

0.076

0.074

0.108

Chatfield State Park

08-035-0004

0.084

0.086

0.082

0.084

0.084

USAF Academy

08-041-0013

0.077

0.072

0.071

0.073

0.106

Manitou Springs

08-041-0016

0.075

0.076

0.072

0.074

0.103

Arvada

08-059-0002

0.078

0.082

0.078

0.079

0.094

Welch

08-059-0005

0.064

0.081

0.080

0.075

0.109

Rocky Flats North

08-059-0006

0.077

0.090

0.090

0.085

0.087

NREL

08-059-0011

0.079

0.083

0.085

0.082

0.092

Rocky Mtn. Nat’l Park

08-069-0007

0.075

0.076

0.078

0.076

0.103

Fort Collins – West

08-069-0011

---

0.087

0.085

---

---

Fort Collins

08-069-1004

0.076

0.078

0.069

0.074

0.100

Greeley – Weld Tower

08-123-0009

0.078

0.082

0.074

0.073

0.094

NOTE: An area is considered to be in attainment of the National Ambient Air Quality Standard when the 3-year average of the annual 4th highest daily maximum 8-hour ozone concentration at a site is less than or equal to 0.08 ppm. Due to rounding, a 3-year average 4th maximum value of 0.085 ppm or greater would constitute a violation of the 0.08 ppm standard.