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§ 81.306 Colorado.
Colorado—1971 Sulfur Dioxide NAAQS
[Primary and Secondary]
| Designated Area | Does not meet primary standards | Does not meet secondary standards | Cannot be classified | Better than national standards |
|---|---|---|---|---|
| Entire State | X |
Colorado—2010 Sulfur Dioxide NAAQS
[Primary]
| Designated area 1 | Designation | |
|---|---|---|
| Date 3 | Type | |
| Colorado Springs, CO | 9/12/16 | Unclassifiable. |
| El Paso County (part) | ||
| Manitou Springs | ||
| Colorado Springs (and certain unincorporated areas) as follows; Areas east of the western city limits of Colorado Springs, north of the southern city limits of Colorado Springs with the addition of the area termed “Stratmoor” bounded on the south by South Academy Boulevard, west of Powers Blvd, and south of East Woodman Blvd (east of Academy Blvd. N) and the northern city limits of Colorado Springs (west of Academy Blvd. N). | ||
| Eastern Morgan County, CO | 9/12/16 | Unclassifiable. |
| Morgan County (part) | ||
| Circle with a 12-kilometer radius centered on the Pawnee Power Plant | ||
| State AQCR 01 (remainder) | Attainment/Unclassifiable. | |
| Logan County | ||
| Morgan County (part) (remainder) | ||
| Phillips County | ||
| Sedgwick County | ||
| Washington County | ||
| Yuma County | ||
| State AQCR 02 | Attainment/Unclassifiable. | |
| Larimer County | ||
| Weld County | ||
| State AQCR 03 | Attainment/Unclassifiable. | |
| Adams County | ||
| Arapahoe County | ||
| Boulder County | ||
| Broomfield County | ||
| Clear Creek County | ||
| Denver County | ||
| Douglas County | ||
| Gilpin County | ||
| Jefferson County | ||
| State AQCR 04 (remainder) | Attainment/Unclassifiable. | |
| El Paso County (part) (remainder) | ||
| Park County | ||
| Teller County | ||
| State AQCR 05 | Attainment/Unclassifiable. | |
| Cheyenne County | ||
| Elbert County | ||
| Kit Carson County | ||
| Lincoln County | ||
| State AQCR 06 | Attainment/Unclassifiable. | |
| Baca County | ||
| Bent County | ||
| Crowley County | ||
| Kiowa County | ||
| Otero County | ||
| Prowers County | ||
| State AQCR 07 | Attainment/Unclassifiable. | |
| Huerfano | ||
| Las Animas | ||
| Pueblo | ||
| State AQCR 08 | Attainment/Unclassifiable. | |
| Alamosa County | ||
| Conejos County | ||
| Costilla County | ||
| Mineral County | ||
| Rio Grande County | ||
| Saguache County | ||
| State AQCR 09 | Attainment/Unclassifiable. | |
| Archuleta County 2 | ||
| Dolores | ||
| La Plata 2 | ||
| Montezuma 2 | ||
| San Juan | ||
| State AQCR 10 | Attainment/Unclassifiable. | |
| Delta County | ||
| Gunnison County | ||
| Hinsdale County | ||
| Montrose County | ||
| Ouray County | ||
| San Miguel County | ||
| State AQCR 11 | Attainment/Unclassifiable. | |
| Garfield County | ||
| Mesa County | ||
| Moffat County | ||
| Rio Blanco County | ||
| State AQCR 12 | Attainment/Unclassifiable. | |
| Eagle County | ||
| Grand County | ||
| Jackson County | ||
| Pitkin County | ||
| Routt County | ||
| Summit County | ||
| State AQCR 13 | Attainment/Unclassifiable. | |
| Chaffee County | ||
| Custer County | ||
| Fremont County | ||
| Lake County | ||
| Southern Ute Indian Reservation | Attainment/Unclassifiable. | |
1 Includes any Indian country in each county or area, unless otherwise specified. EPA is not determining the boundaries of any area of Indian country in this table, including any area of Indian country located in the larger designation area. The inclusion of any Indian country in the designation area is not a determination that the state has regulatory authority under the Clean Air Act for such Indian country.
2 Does not include the Southern Ute Indian Reservation, which is being designated separately.
3 This date is April 9, 2018, unless otherwise noted.
Colorado—Carbon Monoxide
| Designated Area | Designation | Classification | ||
|---|---|---|---|---|
| Date 1 | Type | Date 1 | Type | |
| Colorado Springs Area: | October 25, 1999 | Attainment | ||
| Urban Transportation Planing Study Area as defined in 1989. | ||||
| Beginning near the Town of Palmer Lake, at the Northwest corner of the Study Area at a point on the El Paso/Douglas County line, also on the Pike National Forest boundary, then: | ||||
| east along the County line to Elbert Road; south on Elbert Road to Judge Orr Road; east on Judge Orr Road to Ellicott Highway; south on Ellicott Highway to Squirrel Creek Road; west on Squirrel Creek Road to Williams Creek; south along Williams Creek to the confluence of Williams and Fountain Creeks; south along Fountain Creek to the El Paso/Douglas County line; west on the County line to I–25; north on I–25 to Exit 132; west on McGrath to 35th; south on 35th to Specker; northwest on Specker to Titus Blvd.; west on Titus Blvd. to SH–115; | ||||
| south on SH–115 to Rock Creek; | ||||
| northwest along Rock Creek to the Pike National Forest boundary; north along the Forest boundary to Old Stage Road; southwest on Old Stage Road to Gold Camp Road; north on Gold Camp Road to High Drive; north on High Drive to Lower Gold Camp Road; north on Lower Gold Camp Road to the Pike National Forest boundary; west along the Forest boundary, following the boundary north, then east to US–24; northwest on US–24 to the Pikes Peak Toll Road; west on the Toll Road to the El Paso/Teller County line; | ||||
| north along the County line to Crystola Creek; west on Crystola Creek to County Road 282, north on Road 282 to US–24; northeast on US–24 to Trout Creek Road; northwest on Trout Creek Road to Trout Creek; north along Trout Creek to the confluence of Trout and Mule Creeks; north along Mule Creek to Long Gulch; east along Long Gulch to White Gulch; east along White Gulch to Rampart Range Road; southeast on Rampart Range Road to the Pike National Forest Boundary; north along the Forest boundary to the El Paso/Douglas County line, to the point of origin. | ||||
| El Paso County (part) | ||||
| Teller County (part) | ||||
| Denver-Boulder Area: | ||||
| The boundaries for the Denver nonattainment area for carbon monixide (CO) are described as follows: Start at Colorado Highway 52 where it intersects the eastern boundary of Boulder County; Follow Highway 52 west until it intersects Colorado Highway 119; Follow northern boundary of Boulder city limits west to the 6,000-ft. elevation line; Follow the 6000-ft. elevation line south through Boulder and Jefferson Counties to US 6 in Jefferson County; Follow US 6 west to the Jefferson County-Clear Creek County line; Follow the Jefferson County western boundary south for approximately 16.25 miles; Follow a line east for approximately 3.75 mile to South Turkey Creek; Follow South Turkey Creek northeast for approximately 3.5 miles; Follow a line southeast for approximately 2.0 miles to the junction of South Deer Creek Road and South Deer Creek Canyon Road; Follow South Deer Creek Canyon Road northeast for approximately 3.75 miles; Follow a line southeast for approximately five miles to the northern-most boundary of Pike National Forest where it intersects the Jefferson County-Douglas County line; follow the Pike National forest boundary southeast through Douglas County to the Douglas County-El Paso County line; Follow the southern boundary on Douglas County east to the Elbert County line; Follow the eastern boundary of Douglas County north to the Arapahoe County line; Follow the southern boundary of Araphoe County east to Kiowa Creek; Follow Kiowa Creek northeast through Arapahoe and Adams Counties to the Adams-Weld County line; Follow the northern boundary of Adams County west to the Boulder County line; Follow the eastern boundary of Boulder County north to Highway 52 | January 14, 2002 | Attainment | ||
| Adams County (part) | ||||
| Arapahoe County (part) | ||||
| Boulder County (part) | ||||
| Denver County | ||||
| Douglas County (part) | ||||
| Jefferson County (part) | ||||
| Fort Collins Area: | ||||
| Larimer County (part) | Sept. 22, 2003 | Attainment | ||
| Fort Collins Urban Growth Area Boundary as adopted by the City of Fort Collins and the Larimer County Commissioners and in effect as of July 30, 1991. | ||||
| Greeley Area: | Attainment | |||
| Weld County (part) | May 10, 1999 | |||
| Urban boundaries as defined in the North Front Range Regional Transportation Plan, May, 1990. | ||||
| Longmont Area | Nov. 23, 1999 | Attainment | ||
| Hwy 52 west from the Boulder/Weld County line to 95th Street/Hoover Road, then north on 95th Street/Hoover Road to the intersection of Plateau Road and SH 119, then west on Plateau Road to the intersection of Hygiene Road, then due north to the Boulder/Larimer County line, then due east to the intersection of the Boulder/Larimer/Weld County lines, then south along the Boulder/Weld County line to Hwy 52, plus the portion of the City of Longmont east of the Boulder/Weld County line in Weld County. | ||||
| Boulder County (part): | ||||
| Weld County (part): | ||||
| State AQCR 1 | Unclassifiable/Attainment | |||
| Logan County | ||||
| Morgan County | ||||
| Phillips County | ||||
| Sedgwick County | ||||
| Washington County | ||||
| Yuma County | ||||
| State AQCR 2 (Remainder of) | ||||
| Larimer County (part) | Unclassifiable/Attainment | |||
| Area outside Fort Collins Urban Growth Area Boundary | ||||
| Weld County (part) | ||||
| Remainder of county | Unclassifiable/Attainment | |||
| State AQCR 3 (Remainder of) | Unclassifiable/Attainment | |||
| Adams County (part) | ||||
| Remainder of County | ||||
| Arapahoe County (part) | ||||
| Remainder of County | ||||
| Boulder County (part) | ||||
| Remainder of County | ||||
| Clear Creek County | ||||
| Douglas County (part) | ||||
| Remainder of County | ||||
| Gilpin County | ||||
| Jefferson County (part) | ||||
| Remainder of County | ||||
| State AQCR 4 (Remainder of) | Unclassifiable/Attainment | |||
| El Paso County (part) | ||||
| Area other than Urban Transportation Planning Study Area as defined in 1989 | ||||
| Park County | ||||
| Teller County (part) | ||||
| Remainder of County | ||||
| State AQCR's 5-13 | Unclassifiable/Attainment | |||
| Alamosa County | ||||
| Archuleta County | ||||
| Baca County | ||||
| Bent County | ||||
| Chaffee County | ||||
| Cheyenne County | ||||
| Conejos County | ||||
| Costilla County | ||||
| Crowley County | ||||
| Custer County | ||||
| Delta County | ||||
| Dolores County | ||||
| Eagle County | ||||
| Elbert County | ||||
| Fremont County | ||||
| Garfield County | ||||
| Grand County | ||||
| Gunnison County | ||||
| Hinsdale County | ||||
| Huerfano County | ||||
| Jackson County | ||||
| Kiowa County | ||||
| Kit Carson County | ||||
| La Plata County | ||||
| Lake County | ||||
| Las Animas County | ||||
| Lincoln County | ||||
| Mesa County | ||||
| Mineral County | ||||
| Moffat County | ||||
| Montezuma County | ||||
| Montrose County | ||||
| Otero County | ||||
| Ouray County | ||||
| Pitkin County | ||||
| Prowers County | ||||
| Pueblo County | ||||
| Rio Blanco County | ||||
| Rio Grande County | ||||
| Routt County | ||||
| Saguache County | ||||
| San Juan County | ||||
| San Miguel County | ||||
| Summit County | ||||