*** 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 4^th-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 4^th maximum value from each of the 3 years is less than 0.085 ppm. Thus, by looking at the 4^th maximum values from the previous 2 years, it is possible to see what the highest 4^th 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 4^th maximum value for 2007.
3-Year Average 4^th Maximum Ozone Values
Site Name	AQS #	2005 4^th Maximum 8-Hour Average Value (ppm)	2006 4^th Maximum 8-Hour Average Value (ppm)	2007 (thru 8/31) 4^th Maximum 8-Hour Average Value (ppm)	2005 - 2007 3-Year Average 4^th Maximum Value (ppm)	2007 Highest Allowable 4^th 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 4^th maximum value of 0.085 ppm or greater would constitute a violation of the 0.08 ppm standard.