*** DRAFT DATA ***

 

2009††††††††† 8-Hour Ozone††††††††† (updated through September 30, 2009)

 

AQS Number

 

Site Name

1st Max

8-Hour

(ppm)

Date 1stMax

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

0.078

08/23

0.077

07/10

0.075

08/11

0.072

08/05

0.071

06/19

08-005-0002

Highland

0.079

08/05

0.077

07/18

0.069

07/06

0.069

07/10

0.069

09/01

08-005-0006

* Aurora East

0.079

09/01

0.068

07/18

0.067

08/12

0.066

07/10

0.066

08/11

08-013-0011

S. Boulder Creek

0.084

08/22

0.079

07/10

0.074

07/15

0.073

06/24

0.071

08/05

08-031-0014

Carriage

0.068

06/28

0.067

07/10

0.066

08/11

0.063

07/18

0.063

08/12

08-031-0025

Denver - Animal Shelter

0.070

07/18

0.067

08/05

0.064

07/15

0.062

08/11

0.060

07/22

08-035-0004

Chatfield State Park

0.085

08/05

0.078

07/10

0.078

07/18

0.071

05/12

0.071

07/22

08-041-0013

Colo. Spgs. - Academy

0.064

08/12

0.063

04/17

0.062

05/17

0.060

05/27

0.060

08/20

08-041-0016

Manitou Springs

0.071

04/17

0.066

08/12

0.065

05/17

0.064

07/16

0.063

04/26

08-045-0012

Rifle Ė Health

0.064

04/30

0.063

04/16

0.062

03/29

0.062

04/28

0.061

04/29

08-059-0002

Arvada

0.078

07/10

0.074

08/05

0.070

06/28

0.070

08/11

0.070

08/22

08-059-0005

Welch

0.078

07/18

0.074

08/05

0.071

07/10

0.070

07/15

0.068

07/17

08-059-0006

Rocky Flats - N

0.086

08/22

0.085

07/10

0.085

07/15

0.079

08/05

0.077

06/24

08-059-0011

NREL

0.081

07/10

0.076

08/05

0.071

08/22

0.070

07/18

0.070

08/23

08-059-0013

* Aspen Park

0.077

07/10

0.076

08/05

0.067

07/16

0.067

07/17

0.067

07/18

08-069-0007

** NPS - Rocky Mtn. NP

0.075

06/19

0.070

08/07

0.068

05/13

0.068

08/05

0.067

04/26

08-069-0011

Ft. Collins - West

0.082

08/22

0.074

08/11

0.073

05/13

0.073

07/08

0.072

06/19

08-069-0012

* Rist Canyon

0.071

08/21

0.069

06/19

0.069

06/22

0.067

08/13

0.066

08/04

08-069-1004

Ft. Collins - CSU

0.074

08/22

0.069

05/13

0.062

06/25

0.061

07/08

0.060

06/17

08-077-0020

Palisade - Water

0.066

04/30

0.065

05/16

0.064

04/28

0.063

04/29

0.063

08/15

08-083-0006

Cortez

0.066

04/30

0.064

05/18

0.064

06/28

0.063

05/16

0.063

06/19

08-123-0009

Greeley - Weld Tower

0.071

08/11

0.070

08/12

0.070

08/22

0.067

06/19

0.067

06/28

 

NOTES: Values at or above the level of the 8-hour standard (0.075 ppm) are highlighted in yellow.

* The Aurora East site commenced on 06/09/09, Aspen Park on 05/01/09 and Rist Canyon on 05/28/09.

** Rocky Mtn. NP data thru 8/31/09.

 


 

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 or equal to 0.075 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 4th maximum values for 2007 and 2008, the current 4th maximum value for 2009, the current 3-year average, and the maximum possible level for 2009 in order to remain in attainment of the new ozone standard.

3-Year Average 4th Maximum Ozone Values

 

 

 

Site Name

 

 

 

AQS #

2007

4th Maximum

8-Hour Average

Value (ppm)

2008

4th Maximum

8-Hour Average

Value (ppm)

2009 (thru 8/31)

4th Maximum

8-Hour Average

Value (ppm)

2007 - 2009

3-Year Average

4th Maximum

Value (ppm)

2009

Highest Allowable

4th Maximum

8-Hour Average

Value (ppm)

Welby

08-001-3001

0.070

0.076

0.072

0.072

0.081

Highland

08-005-0002

0.075

---

0.069

---

---

* Aurora East

08-005-0006

---

---

0.066

---

---

S. Boulder Creek

08-013-0011

0.085

0.076

0.073

0.078

0.066

Carriage

08-031-0014

0.076

0.072

0.063

0.070

0.079

Denver - Animal Shelter

08-031-0025

---

0.070

0.062

---

---

Chatfield State Park

08-035-0004

0.082

0.080

0.071

0.077

0.065

USAF Academy

08-041-0013

0.072

0.070

0.060

0.067

0.085

Manitou Springs

08-041-0016

0.072

0.072

0.064

0.069

0.083

Rifle - Health

08-045-0012

---

0.066

0.062

---

---

Arvada

08-059-0002

0.079

0.074

0.070

0.074

0.074

Welch

08-059-0005

0.080

0.073

0.070

0.074

0.074

Rocky Flats North

08-059-0006

0.090

0.079

0.079

0.082

0.058

NREL

08-059-0011

0.085

0.076

0.070

0.077

0.066

* Aspen Park

08-059-0013

---

---

0.067

---

---

NPS - Rocky Mtn. Natíl Park

08-069-0007

0.078

0.076

0.068 (thru 8/31)

0.074

0.073

Fort Collins - West

08-069-0011

0.085

0.076

0.073

0.078

0.066

* Rist Canyon

08-069-0012

---

---

0.067

---

---

Fort Collins - CSU

08-069-1004

0.069

0.066

0.061

0.065

0.092

Palisade - Water

08-077-0020

---

0.070

0.063

---

---

Cortez

08-083-0006

---

0.064

0.063

---

---

Greeley - Weld Tower

08-123-0009

0.074

0.073

0.067

0.071

0.080

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 0.075 ppm.

 

NOTES: Values above the level of the 3-year average 4th-maximum 8-hour standard are highlighted in red.

* The Aurora East site commenced on 06/09/09, Aspen Park on 05/01/09 and Rist Canyon on 05/28/09.