Colorado--1971 Sulfur Dioxide NAAQS (Primary and Secondary)----------------------------------------------------------------------------------------------------------------
Does not
Does not meet Cannot be Better than
Designated Area meet primary secondary classified national
standards standards standards----------------------------------------------------------------------------------------------------------------Entire State............................................ ............ ............ ............ X----------------------------------------------------------------------------------------------------------------
Colorado--Carbon Monoxide----------------------------------------------------------------------------------------------------------------
Designation Classification
Designated Area ---------------------------------------------------------------------------
Date \1\ Type Date \1\ Type----------------------------------------------------------------------------------------------------------------Colorado Springs Area: October Attainment
25, 1999
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 January Attainment
nonattainment area for carbon 14, 2002
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
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, Attainment
2003
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, Attainment
1999
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 CountyState AQCR 2 (Remainder of)
Larimer County (part)............. ......... Unclassifiable/Attainment
Area outside Fort Collins Urban
Growth Area Boundary
Weld County (part)
Remainder of county............. ......... Unclassifiable/AttainmentState 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 CountyState 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 CountyState 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----------------------------------------------------------------------------------------------------------------\1\ This date is November 15, 1990, unless otherwise noted.
Colorado--Ozone (1-Hour Standard)\4\----------------------------------------------------------------------------------------------------------------
Designation Classification
Designated area ---------------------------------------------------------------------------
Date \1\ Type Date \1\ Type----------------------------------------------------------------------------------------------------------------Denver-Boulder Area:
Adams County (part)
West of Kiowa Creek......... 10/11/01 Attainment
Arapahoe County (part)
West of Kiowa Creek......... ......... Attainment
Boulder County (part) excluding ......... Attainment
Rocky Mountain National Park.
Denver County................... ......... Attainment
Douglas County.................. ......... Attainment
Jefferson County................ ......... AttainmentState AQCR 01....................... ......... Unclassifiable/Attainment
Logan County
Morgan County
Phillips County
Sedgwick County
Washington County
Yuma CountyState AQCR 02....................... ......... Unclassifiable/Attainment
Larimer County
Weld CountyState AQCR 03 (Remainder of)........ ......... Unclassifiable/Attainment
Adams County (part) East of
Kiowa Creek
Arapahoe County (part) East of
Kiowa Creek
Boulder County (part) Rocky Mtn.
National Park Only
Clear Creek County
Gilpin CountyState AQCR 11....................... ......... Unclassifiable/Attainment
Garfield County
Mesa County
Moffat County
Rio Blanco CountyRest of State....................... ......... 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
El Paso County
Elbert County
Fremont 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
Mineral County
Montezuma County
Montrose County
Otero County
Ouray County
Park County
Pitkin County
Prowers County
Pueblo County
Rio Grande County
Routt County
Saguache County
San Juan County
San Miguel County
Summit County
Teller County----------------------------------------------------------------------------------------------------------------\1\ This date is October 18, 2000, unless otherwise noted.\2\ An area designated as an ozone nonattainment area as of the date of enactment of the CAAA of the 1990 that
did not violate the ozone NAAQS during the period of 1987-1989.\3\ This date is January 16, 2001.\4\ The 1-hour ozone standard is revoked effective June 15, 2005 for all areas in Colorado except the Denver
(Denver-Boulder-Greeley-Ft. Collins-Love) area where it is revoked effective November 20, 2008.
Colorado--PM-10----------------------------------------------------------------------------------------------------------------
Designation Classification
Designated area ----------------------------------------------------------------------
Date Type Date Type----------------------------------------------------------------------------------------------------------------Archuleta County
Pagosa Springs Area.................... 8/14/01 Attainment
Township 35N-Range 2W: Sections
13, 14, 15; Section 23 NE, N \1/
2\ SE; Section 24 all except
SWSW; Section 25 N \1/2\NE,
NENW.
Township 35N-Range 1W: Section 18
W \1/2\Adams, Denver, and Boulder Counties
Denver Metropolitan area............... 10/16/02 Attainment
All of Denver, Jefferson, and Douglas
Counties, Boulder County (excluding
the Rocky Mountain National Park)
and the Colorado automobile
inspection and readjustment program
portions of Adams and Arapahoe
CountiesSan Miguel County........................
Telluride.............................. 8/14/01 Attainment
The Telluride attainment/
maintenance area begins at the
intersection of Colorado State
Highway 145 and the Telluride
service area boundary, as it
existed in 1991. The western
edge of the nonattainment area
until it meets Remine Creek is
defined as follows: A tract of
land located in a portion of the
west one-half of Section 28 and
the east one-half of Section 29,
Township 43 North, Range 9 west,
of New Mexico Principal
Meridian, County of San Miguel,
State of Colorado, described as
follows: Beginning at the
southwest corner of the said
Section 28; Thence N 89
deg.36'00'' W. 292.70 Feet;
Thence S 04 deg.05'12'' W.
538.63 Feet; Thence N 03
deg.29'42'' W. 780.19 Feet;
Thence N 22 deg.15'00'' E.
3344.16 Feet; Thence S 51
deg.51'49'' E. 570.44 Feet;
Thence S 03 deg.15'36'' E.
1106.22 Feet; Thence S 45
deg.24'42'' E. 546.96 Feet;
Thence S 28 deg.41'12'' W.
549.62 Feet; Thence S 29
deg.40'09'' E. 169.68 Feet;
Thence S 44 deg.30'03'' W.
649.51 Feet; Thence S 85
deg.54'00'' E. 660.00 Feet;
Thence S 04 deg.06'00'' W.
660.00 Feet; Thence N 89
deg.56'00'' E. 1318.68 Feet; to
the true point of beginning
containing 11249 acres as
described above. Then, at Remine
Creek, the attainment/
maintenance boundary follows the
service area boundary for 9.65
miles to the 9,200 foot contour
line. The boundary then
intersects Bear Creek. Here the
attainment/maintenance boundary
diverges from the service area
boundary (9,200 foot contour
line). The attainment/
maintenance boundary continues
in a west, southwest direction
for 0.92 miles from the
intersection of the 9,200 foot
contour line and Bear Creek to
the top of ski lift number 9 in
the Telluride Ski Area at an
elevation of about 11,900 feet.
The boundary then shifts and
runs in a north-westerly
direction for 0.83 miles from
the top of lift 9 to the top of
lift 7, which is located at an
elevation of 10,490 feet. From
the top of lift 7, the
attainment/maintenance boundary
continues in a north-westerly
direction for 0.5 miles to the
intersection of lift 3 with the
10,000 foot control line. The
attainment/maintenance boundary
follows the 10,000 foot contour
line in a south, south-west
direction for 3.2 miles, until
it intersects Skunk Creek. Here
the boundary diverges from the
10,000 foot contour line and
follows Skunk Creek in a
northerly direction for 2.25
miles. At the intersection of
Skunk Creek and Colorado State
Highway 145, the attainment/
maintenance boundary leaves the
creek and follows Highway 145 in
a northerly direction until it
meets the service area boundary
as it existed prior to changes
adopted in 1991.Prowers County
Lamar.................................. 12/27/05 Attainment ......... ...................Pitkin County:...........................
Aspen/Pitkin County Area--The area 7/14/03 Attainment.
encompassed by the following Parcel ID
numbers, as defined by the Pitkin
County Planning Department: 2337-29,
2737-28, 2737-21, 2737-20, 2737-19,
2737-18, 2737-17, 2737-08, 2737-07,
2737-06, 2735-22, 2735-15, 2735-14,
2735-13, 2735-12, 2735-11, 2735-10,
2735-03, 2735-02, 2735-01, 2641-31,
2643-36, 2643-35, 2643-34, 2643-27,
2643-26.Fremont County
Canon City Area........................ 7/31/00 Attainment
Township 18S--Range 70W: All of
sections 21, 22, 27, 28, 33, and 34;
the E\1/2\, NENW, NESW, SENW, SESW
quarters of sections 20, 29, 32; and
the W\1/2\ of sections 23, 26, and
35; Township 19S--Range 70W: All of
sections 3, 4, 9, 10; E\1/2\, NENW,
NESW, SENW, SESW quarters of
sections 5 and 8; W\1/2\ of sections
2 and 11.Routt County (part):
Steamboat Springs...................... 11/24/04 Attainment.
On the East--The Routt National
Forest.
On the South--The southern border of
sections 19, 10, 21, T4N, R84W of
the 6th P.M. and the southern border
of sections 23, 24, T4N, R85W of the
6th P.M.
On the West--Beginning at the
southwestern corner of section 23,
T4N, R85W of the 6th P.M. North
along the western border of sections
23, 14, 11, T4N, R85W. Thence, along
the ridge which bisects sections 35,
36, 25, 24, 13, 14, 11, 12, 1, T5N,
R85W, and sections 36, 25, 24, T6N,
R85W. Thence heading northwest along
the ridge which bisects sections 23,
15, 10, 9, 4, T6N, R85W of 6th P.M.
Thence, heading northeast along the
ridge which bisects sections 33, 34,
35, 36, 25, T7N, R85W and sections
30 and 10 of T7N, R84W. Thence,
north along the N 1/2 of the western
edge of section 19, to the NW corner
of section 18, T7N, R84W.
On the North--The northern boundary
of sections 16, 17, 18, T7N, R84W of
6th P.M.AQCR 1................................... 11/15/90 UnclassifiableAQCR 2................................... 11/15/90 UnclassifiableAQCR 3 (excluding the Denver Metropolitan 11/15/90 Unclassifiable
PM-10 nonattainment area).AQCR 4................................... 11/15/90 UnclassifiableAQCR 5................................... 11/15/90 UnclassifiableAQCR 6 (excluding the Lamar PM-10 11/15/90 Unclassifiable
nonattainment area).AQCR 7................................... 11/15/90 UnclassifiableAQCR 8................................... 11/15/90 UnclassifiableAQCR 9 (excluding the Pagosa Springs PM- 11/15/90 Unclassifiable
10 nonattainment area).AQCR 10 (excluding the Telluride PM-10 11/15/90 Unclassifiable
nonattainment area).AQCR 11.................................. 11/15/90 UnclassifiableAQCR 12 (excluding the Aspen/Pitkin 11/15/90 Unclassifiable
County and Steamboat Springs Area
Airshed PM-10 nonattainment areas).AQCR 13 (excluding the Canon City PM-10 1/15/90 Unclassifiable
nonattainment area).----------------------------------------------------------------------------------------------------------------
Colorado--1997 Annual PM2.5 NAAQS
[Primary and secondary]----------------------------------------------------------------------------------------------------------------
Designation \a\ Classification
Designated area -----------------------------------------------------------------------------
Date \1\ Type Date Type----------------------------------------------------------------------------------------------------------------Denver-Boulder Area:
Adams County (part) West of .............. Unclassifiable/
Kiowa Creek. Attainment.
Arapahoe County (part) West of .............. Unclassifiable/
Kiowa Creek. Attainment.
Boulder County (part) .............. Unclassifiable/
Excluding Rocky Mountain Attainment.
National Park.
Broomfield County............. .............. Unclassifiable/
Attainment.
Denver County................. .............. Unclassifiable/
Attainment.
Douglas County................ .............. Unclassifiable/
Attainment.
Jefferson County.............. .............. Unclassifiable/
Attainment.State AQCR 01:
Logan County.................. .............. Unclassifiable/
Attainment.
Morgan County................. .............. Unclassifiable/
Attainment.
Phillips County............... .............. Unclassifiable/
Attainment.
Sedgwick County............... .............. Unclassifiable/
Attainment.
Washington County............. .............. Unclassifiable/
Attainment.
Yuma County................... .............. Unclassifiable/
Attainment.State AQCR 02:
Larimer County................ .............. Unclassifiable/
Attainment.
Weld County................... .............. Unclassifiable/
Attainment.State AQCR 03 (remainder of):
Adams County (remainder)...... .............. Unclassifiable/
Attainment.
Arapahoe County (remainder)... .............. Unclassifiable/
Attainment.
Boulder County (remainder).... .............. Unclassifiable/
Attainment.
Clear Creek County............ .............. Unclassifiable/
Attainment.
Gilpin County................. .............. Unclassifiable/
Attainment.State AQCR 04:
El Paso County................ .............. Unclassifiable/
Attainment.
Park County................... .............. Unclassifiable/
Attainment.
Teller County................. .............. Unclassifiable/
Attainment.State AQCR 05:
Cheyenne County............... .............. Unclassifiable/
Attainment.
Elbert County................. .............. Unclassifiable/
Attainment.
Kit Carson County............. .............. Unclassifiable/
Attainment.
Lincoln County................ .............. Unclassifiable/
Attainment.State AQCR 06:
Baca County................... .............. Unclassifiable/
Attainment.
Bent County................... .............. Unclassifiable/
Attainment.
Crowley County................ .............. Unclassifiable/
Attainment.
Kiowa County.................. .............. Unclassifiable/
Attainment.
Otero County.................. .............. Unclassifiable/
Attainment.
Prowers County................ .............. Unclassifiable/
Attainment.State AQCR 07:
Huerfano County............... .............. Unclassifiable/
Attainment.
Las Animas County............. .............. Unclassifiable/
Attainment.
Pueblo County................. .............. Unclassifiable/
Attainment.State AQCR 08:
Alamosa County................ .............. Unclassifiable/
Attainment.
Conejos County................ .............. Unclassifiable/
Attainment.
Costilla County............... .............. Unclassifiable/
Attainment.
Mineral County................ .............. Unclassifiable/
Attainment.
Rio Grande County............. .............. Unclassifiable/
Attainment.
Saguache County............... .............. Unclassifiable/
Attainment.State AQCR 09:
Archuleta County.............. .............. Unclassifiable/
Attainment.
Dolores County................ .............. Unclassifiable/
Attainment.
La Plata County............... .............. Unclassifiable/
Attainment.
Montezuma County.............. .............. Unclassifiable/
Attainment.
San Juan County............... .............. Unclassifiable/
Attainment.State AQCR 10:
Delta County.................. .............. Unclassifiable/
Attainment.
Gunnison County............... .............. Unclassifiable/
Attainment.
Hinsdale County............... .............. Unclassifiable/
Attainment.
Montrose County............... .............. Unclassifiable/
Attainment.
Ouray County.................. .............. Unclassifiable/
Attainment.
San Miguel County............. .............. Unclassifiable/
Attainment.State AQCR 11:
Garfield County............... .............. Unclassifiable/
Attainment.
Mesa County................... .............. Unclassifiable/
Attainment.
Moffat County................. .............. Unclassifiable/
Attainment.
Rio Blanco County............. .............. Unclassifiable/
Attainment.State AQCR 12:
Eagle County.................. .............. Unclassifiable/
Attainment.
Grand County.................. .............. Unclassifiable/
Attainment.
Jackson County................ .............. Unclassifiable/
Attainment.
Pitkin County................. .............. Unclassifiable/
Attainment.
Routt County.................. .............. Unclassifiable/
Attainment.
Summit County................. .............. Unclassifiable/
Attainment.State AQCR 13:
Chaffee County................ .............. Unclassifiable/
Attainment.
Custer County................. .............. Unclassifiable/
Attainment.
Fremont County................ .............. Unclassifiable/
Attainment.
Lake County................... .............. Unclassifiable/
Attainment.----------------------------------------------------------------------------------------------------------------\a\ Includes Indian Country located in each county or area, except as otherwise specified.\1\This date is 90 days after January 5, 2005, unless otherwise noted.
Colorado--2012 Annual PM2.5 NAAQS
[Primary]--------------------------------------------------------------------------------------------------------------------------------------------------------
Designation Classification
Designated area \1\ ---------------------------------------------------------------------------------------------------------------
Date \2\ Type Date \2\ Type--------------------------------------------------------------------------------------------------------------------------------------------------------State AQCR 01:
Logan County........................ ........... Unclassifiable/Attainment................
Morgan County....................... ........... Unclassifiable/Attainment................
Phillips County..................... ........... Unclassifiable/Attainment................
Sedgwick County..................... ........... Unclassifiable/Attainment................
Washington County................... ........... Unclassifiable/Attainment................
Yuma County......................... ........... Unclassifiable/Attainment................State AQCR 02:
Larimer County...................... ........... Unclassifiable/Attainment................
Weld County......................... ........... Unclassifiable/Attainment................State AQCR 03:
Adams County........................ ........... Unclassifiable/Attainment................
Arapahoe County..................... ........... Unclassifiable/Attainment................
Boulder County...................... ........... Unclassifiable/Attainment................
Broomfield County................... ........... Unclassifiable/Attainment................
Clear Creek County.................. ........... Unclassifiable/Attainment................
Denver County....................... ........... Unclassifiable/Attainment................
Douglas County...................... ........... Unclassifiable/Attainment................
Gilpin County....................... ........... Unclassifiable/Attainment................
Jefferson County.................... ........... Unclassifiable/Attainment................State AQCR 04:
El Paso County...................... ........... Unclassifiable/Attainment................
Park County......................... ........... Unclassifiable/Attainment................
Teller County....................... ........... Unclassifiable/Attainment................State AQCR 05:
Cheyenne County..................... ........... Unclassifiable/Attainment................
Elbert County....................... ........... Unclassifiable/Attainment................
Kit Carson County................... ........... Unclassifiable/Attainment................
Lincoln County...................... ........... Unclassifiable/Attainment................State AQCR 06:
Baca County......................... ........... Unclassifiable/Attainment................
Bent County......................... ........... Unclassifiable/Attainment................
Crowley County...................... ........... Unclassifiable/Attainment................
Kiowa County........................ ........... Unclassifiable/Attainment................
Otero County........................ ........... Unclassifiable/Attainment................
Prowers County...................... ........... Unclassifiable/Attainment................State AQCR 07:
Huerfano County..................... ........... Unclassifiable/Attainment................
Las Animas County................... ........... Unclassifiable/Attainment................
Pueblo County....................... ........... Unclassifiable/Attainment................State AQCR 08:
Alamosa County...................... ........... Unclassifiable/Attainment................
Conejos County...................... ........... Unclassifiable/Attainment................
Costilla County..................... ........... Unclassifiable/Attainment................
Mineral County...................... ........... Unclassifiable/Attainment................
Rio Grande County................... ........... Unclassifiable/Attainment................
Saguache County..................... ........... Unclassifiable/Attainment................State AQCR 09:
Archuleta County.................... ........... Unclassifiable/Attainment................
Dolores County...................... ........... Unclassifiable/Attainment................
La Plata County..................... ........... Unclassifiable/Attainment................
Montezuma County.................... ........... Unclassifiable/Attainment................
San Juan County..................... ........... Unclassifiable/Attainment................State AQCR 10:
Delta County........................ ........... Unclassifiable/Attainment................
Gunnison County..................... ........... Unclassifiable/Attainment................
Hinsdale County..................... ........... Unclassifiable/Attainment................
Montrose County..................... ........... Unclassifiable/Attainment................
Ouray County........................ ........... Unclassifiable/Attainment................
San Miguel County................... ........... Unclassifiable/Attainment................State AQCR 11:
Garfield County..................... ........... Unclassifiable/Attainment................
Mesa County......................... ........... Unclassifiable/Attainment................
Moffat County....................... ........... Unclassifiable/Attainment................
Rio Blanco County................... ........... Unclassifiable/Attainment................State AQCR 12:
Eagle County........................ ........... Unclassifiable/Attainment................
Grand County........................ ........... Unclassifiable/Attainment................
Jackson County...................... ........... Unclassifiable/Attainment................
Pitkin County....................... ........... Unclassifiable/Attainment................
Routt County........................ ........... Unclassifiable/Attainment................
Summit County....................... ........... Unclassifiable/Attainment................State AQCR 13:
Chaffee County...................... ........... Unclassifiable/Attainment................
Custer County....................... ........... Unclassifiable/Attainment................
Fremont County...................... ........... Unclassifiable/Attainment................
Lake County......................... ........... Unclassifiable/Attainment................--------------------------------------------------------------------------------------------------------------------------------------------------------\1\ Includes areas of Indian country located in each county or area, except as otherwise specified.\2\ This date is April 15, 2015, unless otherwise noted.
Colorado--1997 24-Hour PM2.5 NAAQS
[Primary and secondary]----------------------------------------------------------------------------------------------------------------
Designation \a\ Classification
Designated area -----------------------------------------------------------------------------
Date \1\ Type Date Type----------------------------------------------------------------------------------------------------------------Denver-Boulder Area:
Adams County (part) West of .............. Unclassifiable/
Kiowa Creek. Attainment.
Arapahoe County (part) West of .............. Unclassifiable/
Kiowa Creek. Attainment.
Boulder County (part) .............. Unclassifiable/
Excluding Rocky Mountain Attainment.
National Park.
Broomfield County............. .............. Unclassifiable/
Attainment.
Denver County................. .............. Unclassifiable/
Attainment.
Douglas County................ .............. Unclassifiable/
Attainment.
Jefferson County.............. .............. Unclassifiable/
Attainment.State AQCR 01:
Logan County.................. .............. Unclassifiable/
Attainment.
Morgan County................. .............. Unclassifiable/
Attainment.
Phillips County............... .............. Unclassifiable/
Attainment.
Sedgwick County............... .............. Unclassifiable/
Attainment.
Washington County............. .............. Unclassifiable/
Attainment.
Yuma County................... .............. Unclassifiable/
Attainment.State AQCR 02:
Larimer County................ .............. Unclassifiable/
Attainment.
Weld County................... .............. Unclassifiable/
Attainment.State AQCR 03 (remainder of):
Adams County (remainder)...... .............. Unclassifiable/
Attainment.
Arapahoe County (remainder)... .............. Unclassifiable/
Attainment.
Boulder County (remainder).... .............. Unclassifiable/
Attainment.
Clear Creek County............ .............. Unclassifiable/
Attainment.
Gilpin County................. .............. Unclassifiable/
Attainment.State AQCR 04:
El Paso County................ .............. Unclassifiable/
Attainment.
Park County................... .............. Unclassifiable/
Attainment.
Teller County................. .............. Unclassifiable/
Attainment.State AQCR 05:
Cheyenne County............... .............. Unclassifiable/
Attainment.
Elbert County................. .............. Unclassifiable/
Attainment.
Kit Carson County............. .............. Unclassifiable/
Attainment.
Lincoln County................ .............. Unclassifiable/
Attainment.State AQCR 06:
Baca County................... .............. Unclassifiable/
Attainment.
Bent County................... .............. Unclassifiable/
Attainment.
Crowley County................ .............. Unclassifiable/
Attainment.
Kiowa County.................. .............. Unclassifiable/
Attainment.
Otero County.................. .............. Unclassifiable/
Attainment.
Prowers County................ .............. Unclassifiable/
Attainment.State AQCR 07:
Huerfano County............... .............. Unclassifiable/
Attainment.
Las Animas County............. .............. Unclassifiable/
Attainment.
Pueblo County................. .............. Unclassifiable/
Attainment.State AQCR 08:
Alamosa County................ .............. Unclassifiable/
Attainment.
Conejos County................ .............. Unclassifiable/
Attainment.
Costilla County............... .............. Unclassifiable/
Attainment.
Mineral County................ .............. Unclassifiable/
Attainment.
Rio Grande County............. .............. Unclassifiable/
Attainment.
Saguache County............... .............. Unclassifiable/
Attainment.State AQCR 09:
Archuleta County.............. .............. Unclassifiable/
Attainment.
Dolores County................ .............. Unclassifiable/
Attainment.
La Plata County............... .............. Unclassifiable/
Attainment.
Montezuma County.............. .............. Unclassifiable/
Attainment.
San Juan County............... .............. Unclassifiable/
Attainment.State AQCR 10:
Delta County.................. .............. Unclassifiable/
Attainment.
Gunnison County............... .............. Unclassifiable/
Attainment.
Hinsdale County............... .............. Unclassifiable/
Attainment.
Montrose County............... .............. Unclassifiable/
Attainment.
Ouray County.................. .............. Unclassifiable/
Attainment.
San Miguel County............. .............. Unclassifiable/
Attainment.State AQCR 11:
Garfield County............... .............. Unclassifiable/
Attainment.
Mesa County................... .............. Unclassifiable/
Attainment.
Moffat County................. .............. Unclassifiable/
Attainment.
Rio Blanco County............. .............. Unclassifiable/
Attainment.State AQCR 12:
Eagle County.................. .............. Unclassifiable/
Attainment.
Grand County.................. .............. Unclassifiable/
Attainment.
Jackson County................ .............. Unclassifiable/
Attainment.
Pitkin County................. .............. Unclassifiable/
Attainment.
Routt County.................. .............. Unclassifiable/
Attainment.
Summit County................. .............. Unclassifiable/
Attainment.State AQCR 13:
Chaffee County................ .............. Unclassifiable/
Attainment.
Custer County................. .............. Unclassifiable/
Attainment.
Fremont County................ .............. Unclassifiable/
Attainment.
Lake County................... .............. Unclassifiable/
Attainment.----------------------------------------------------------------------------------------------------------------\a\ Includes Indian Country located in each county or area, except as otherwise specified.\1\This date is 90 days after January 5, 2005, unless otherwise noted.
Colorado--2006 24-Hour PM2.5 NAAQS
[Primary and secondary]----------------------------------------------------------------------------------------------------------------
Designation \a\ Classification
Designated area -----------------------------------------------------------------------------
Date \1\ Type Date Type----------------------------------------------------------------------------------------------------------------Denver-Boulder Area:
Adams County (part) West of .............. Unclassifiable/
Kiowa Creek. Attainment..
Arapahoe County (part) West of .............. Unclassifiable/
Kiowa Creek. Attainment..
Boulder County (part) .............. Unclassifiable/
Excluding Rocky Mountain Attainment..
National Park.
Broomfield County............. .............. Unclassifiable/
Attainment..
Denver County................. .............. Unclassifiable/
Attainment..
Douglas County................ .............. Unclassifiable/
Attainment..
Jefferson County.............. .............. Unclassifiable/
Attainment..State AQCR 01:
Logan County.................. .............. Unclassifiable/
Attainment..
Morgan County................. .............. Unclassifiable/
Attainment..
Phillips County............... .............. Unclassifiable/
Attainment..
Sedgwick County............... .............. Unclassifiable/
Attainment..
Washington County............. .............. Unclassifiable/
Attainment..
Yuma County................... .............. Unclassifiable/
Attainment..State AQCR 02:
Larimer County................ .............. Unclassifiable/
Attainment..
Weld County................... .............. Unclassifiable/
Attainment..State AQCR 03 (remainder of):
Adams County (remainder)...... .............. Unclassifiable/
Attainment..
Arapahoe County (remainder)... .............. Unclassifiable/
Attainment..
Boulder County (remainder).... .............. Unclassifiable/
Attainment..
Clear Creek County............ .............. Unclassifiable/
Attainment..
Gilpin County................. .............. Unclassifiable/
Attainment..State AQCR 04:
El Paso County................ .............. Unclassifiable/
Attainment..
Park County................... .............. Unclassifiable/
Attainment..
Teller County................. .............. Unclassifiable/
Attainment..State AQCR 05:
Cheyenne County............... .............. Unclassifiable/
Attainment..
Elbert County................. .............. Unclassifiable/
Attainment..
Kit Carson County............. .............. Unclassifiable/
Attainment..
Lincoln County................ .............. Unclassifiable/
Attainment..State AQCR 06:
Baca County................... .............. Unclassifiable/
Attainment..
Bent County................... .............. Unclassifiable/
Attainment..
Crowley County................ .............. Unclassifiable/
Attainment..
Kiowa County.................. .............. Unclassifiable/
Attainment..
Otero County.................. .............. Unclassifiable/
Attainment..
Prowers County................ .............. Unclassifiable/
Attainment..State AQCR 07:
Huerfano County............... .............. Unclassifiable/
Attainment..
Las Animas County............. .............. Unclassifiable/
Attainment..
Pueblo County................. .............. Unclassifiable/
Attainment..State AQCR 08:
Alamosa County................ .............. Unclassifiable/
Attainment..
Conejos County................ .............. Unclassifiable/
Attainment..
Costilla County............... .............. Unclassifiable/
Attainment..
Mineral County................ .............. Unclassifiable/
Attainment..
Rio Grande County............. .............. Unclassifiable/
Attainment..
Saguache County............... .............. Unclassifiable/
Attainment..State AQCR 09:
Archuleta County.............. .............. Unclassifiable/
Attainment..
Dolores County................ .............. Unclassifiable/
Attainment..
La Plata County............... .............. Unclassifiable/
Attainment..
Montezuma County.............. .............. Unclassifiable/
Attainment..
San Juan County............... .............. Unclassifiable/
Attainment..State AQCR 10:
Delta County.................. .............. Unclassifiable/
Attainment..
Gunnison County............... .............. Unclassifiable/
Attainment..
Hinsdale County............... .............. Unclassifiable/
Attainment..
Montrose County............... .............. Unclassifiable/
Attainment..
Ouray County.................. .............. Unclassifiable/
Attainment..
San Miguel County............. .............. Unclassifiable/
Attainment..State AQCR 11:
Garfield County............... .............. Unclassifiable/
Attainment..
Mesa County................... .............. Unclassifiable/
Attainment..
Moffat County................. .............. Unclassifiable/
Attainment..
Rio Blanco County............. .............. Unclassifiable/
Attainment..State AQCR 12:
Eagle County.................. .............. Unclassifiable/
Attainment..
Grand County.................. .............. Unclassifiable/
Attainment..
Jackson County................ .............. Unclassifiable/
Attainment..
Pitkin County................. .............. Unclassifiable/
Attainment..
Routt County.................. .............. Unclassifiable/
Attainment..
Summit County................. .............. Unclassifiable/
Attainment..State AQCR 13:
Chaffee County................ .............. Unclassifiable/
Attainment..
Custer County................. .............. Unclassifiable/
Attainment..
Fremont County................ .............. Unclassifiable/
Attainment..
Lake County................... .............. Unclassifiable/
Attainment..----------------------------------------------------------------------------------------------------------------\a\ Includes Indian Country located in each county or area, except as otherwise specified.\1\ This date is 30 days after November 13, 2009, unless otherwise noted.
Colorado--NO2 (1971 Annual Standard)------------------------------------------------------------------------
Better than
Designated area national
standards------------------------------------------------------------------------Entire State.............................................. X------------------------------------------------------------------------
Colorado--NO2 (2010 1-Hour Standard)----------------------------------------------------------------------------------------------------------------
Designation \a\
Designated area ------------------------------------------------------------------
Date \1\ Type----------------------------------------------------------------------------------------------------------------State AQCR 01:
Logan County............................. ........... Unclassifiable/Attainment.
Morgan County............................ ........... Unclassifiable/Attainment.
Phillips County.......................... ........... Unclassifiable/Attainment.
Sedgwick County.......................... ........... Unclassifiable/Attainment.
Washington County........................ ........... Unclassifiable/Attainment.
Yuma County.............................. ........... Unclassifiable/Attainment.State AQCR 02:
Larimer County........................... ........... Unclassifiable/Attainment.
Weld County.............................. ........... Unclassifiable/Attainment.State AQCR 03:
Adams County............................. ........... Unclassifiable/Attainment.
Arapahoe County.......................... ........... Unclassifiable/Attainment.
Boulder County........................... ........... Unclassifiable/Attainment.
Broomfield County........................ ........... Unclassifiable/Attainment.
Clear Creek County....................... ........... Unclassifiable/Attainment.
Denver County............................ ........... Unclassifiable/Attainment.
Douglas County........................... ........... Unclassifiable/Attainment.
Jefferson County......................... ........... Unclassifiable/Attainment.
Gilpin County............................ ........... Unclassifiable/Attainment.
State AQCR 04:
El Paso County........................... ........... Unclassifiable/Attainment.
Park County.............................. ........... Unclassifiable/Attainment.
Teller County............................ ........... Unclassifiable/Attainment.State AQCR 05:
Cheyenne County.......................... ........... Unclassifiable/Attainment.
Elbert County............................ ........... Unclassifiable/Attainment.
Kit Carson County........................ ........... Unclassifiable/Attainment.
Lincoln County........................... ........... Unclassifiable/Attainment.State AQCR 06:
Baca County.............................. ........... Unclassifiable/Attainment.
Bent County.............................. ........... Unclassifiable/Attainment.
Crowley County........................... ........... Unclassifiable/Attainment.
Kiowa County............................. ........... Unclassifiable/Attainment.
Otero County............................. ........... Unclassifiable/Attainment.
Prowers County........................... ........... Unclassifiable/Attainment.State AQCR 07:
Huerfano County.......................... ........... Unclassifiable/Attainment.
Las Animas County........................ ........... Unclassifiable/Attainment.
Pueblo County............................ ........... Unclassifiable/Attainment.State AQCR 08:
Alamosa County........................... ........... Unclassifiable/Attainment.
Conejos County........................... ........... Unclassifiable/Attainment.
Costilla County.......................... ........... Unclassifiable/Attainment.
Mineral County........................... ........... Unclassifiable/Attainment.
Rio Grande County........................ ........... Unclassifiable/Attainment.
Saguache County.......................... ........... Unclassifiable/Attainment.State AQCR 09:
Archuleta County......................... ........... Unclassifiable/Attainment.
Dolores County........................... ........... Unclassifiable/Attainment.
La Plata County.......................... ........... Unclassifiable/Attainment.
Montezuma County......................... ........... Unclassifiable/Attainment.
San Juan County.......................... ........... Unclassifiable/Attainment.State AQCR 10:
Delta County............................. ........... Unclassifiable/Attainment.
Gunnison County.......................... ........... Unclassifiable/Attainment.
Hinsdale County.......................... ........... Unclassifiable/Attainment.
Montrose County.......................... ........... Unclassifiable/Attainment.
Ouray County............................. ........... Unclassifiable/Attainment.
San Miguel County........................ ........... Unclassifiable/Attainment.State AQCR 11:
Garfield County.......................... ........... Unclassifiable/Attainment.
Mesa County.............................. ........... Unclassifiable/Attainment.
Moffat County............................ ........... Unclassifiable/Attainment.
Rio Blanco County........................ ........... Unclassifiable/Attainment.State AQCR 12:
Eagle County............................. ........... Unclassifiable/Attainment.
Grand County............................. ........... Unclassifiable/Attainment.
Jackson County........................... ........... Unclassifiable/Attainment.
Pitkin County............................ ........... Unclassifiable/Attainment.
Routt County............................. ........... Unclassifiable/Attainment.
Summit County............................ ........... Unclassifiable/Attainment.State AQCR 13:
Chaffee County........................... ........... Unclassifiable/Attainment.
Custer County............................ ........... Unclassifiable/Attainment.
Fremont County........................... ........... Unclassifiable/Attainment.
Lake County.............................. ........... Unclassifiable/Attainment.----------------------------------------------------------------------------------------------------------------\a\ Includes Indian Country located in each county or area, except as otherwise specified.\1\ This date is 90 days after October 31, 2011, unless otherwise noted.
Colorado--1997 8-Hour Ozone NAAQS (Primary and Secondary)----------------------------------------------------------------------------------------------------------------
Designation \a\ Category/classification
Designated area ---------------------------------------------------------------------------
Date \1\ Type Date \1\ Type----------------------------------------------------------------------------------------------------------------Denver-Boulder-Greeley-Ft. Collins-
Loveland, CO:
Adams County.................... \2\ Nonattainment 6/13/12 Subpart 2/Marginal.
Arapahoe County................. \2\ Nonattainment 6/13/12 Subpart 2/Marginal.
Boulder County (includes part of \2\ Nonattainment 6/13/12 Subpart 2/Marginal.
Rocky Mtn. Nat. Park).
Broomfield County............... \2\ Nonattainment 6/13/12 Subpart 2/Marginal.
Denver County................... \2\ Nonattainment 6/13/12 Subpart 2/Marginal.
Douglas County.................. \2\ Nonattainment 6/13/12 Subpart 2/Marginal.
Jefferson County................ \2\ Nonattainment 6/13/12 Subpart 2/Marginal.
Larimer County (part)........... \2\ Nonattainment 6/13/12 Subpart 2/Marginal.
(includes part of Rocky Mtn.
Nat. Park). That portion of the
county that lies south of a
line described as follows:
Beginning at a point on Larimer
County's eastern boundary and
Weld County's western boundary
intersected by 40 degrees, 42
minutes, and 47.1 seconds north
latitude, proceed west to a
point defined by the
intersection of 40 degrees, 42
minutes, 47.1 seconds north
latitude and 105 degrees, 29
minutes, and 40.0 seconds west
longitude, thence proceed south
on 105 degrees, 29 minutes,
40.0 seconds west longitude to
the intersection with 40
degrees, 33 minutes and 17.4
seconds north latitude, thence
proceed west on 40 degrees, 33
minutes, 17.4 seconds north
latitude until this line
intersects Larimer County's
western boundary and Grand
County's eastern boundary.
Weld County (part).............. \2\ Nonattainment 6/13/12 Subpart 2/Marginal.
That portion of the county that
lies south of a line described
as follows: Beginning at a
point on Weld County's eastern
boundary and Logan County's
western boundary intersected by
40 degrees, 42 minutes, 47.1
seconds north latitude, proceed
west on 40 degrees, 42 minutes,
47.1 seconds north latitude
until this line intersects Weld
County's western boundary and
Larimer County's eastern
boundary.State AQCR 01....................... ......... Unclassifiable/Attainment
Logan County
Phillips County
Sedgwick County
Washington County
Yuma CountyState AQCR 03 (remainder of)........ ......... Unclassifiable/Attainment
Clear Creek County
Gilpin CountyState AQCR 11....................... ......... Unclassifiable/Attainment
Garfield County
Mesa County
Moffat County
Rio Blanco CountyRest of State....................... ......... 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
El Paso County
Elbert County
Fremont County
Grand County (includes portion
of W. Rocky Mtn. Nat. Park)
Gunnison County
Hinsdale County
Huerfano County
Jackson County
Kiowa County
Kit Carson County
La Plata County
Lake County
Larimer County (part) remainder
Las Animas County
Lincoln County
Mineral County
Montezuma County
Montrose County
Morgan County
Otero County
Ouray County
Park County
Pitkin County
Prowers County
Pueblo County
Rio Grande County
Routt County
Saguache County
San Juan County
San Miguel County
Summit County
Teller County
Weld County (part) remainder----------------------------------------------------------------------------------------------------------------\a\ Includes Indian Country located in each county or area, except as otherwise specified.\1\ This date is June 15, 2004, unless otherwise noted.\2\ Effective November 20, 2007.
Colorado--2008 8-Hour Ozone NAAQS (Primary and secondary)----------------------------------------------------------------------------------------------------------------
Designation Classification
Designated area ---------------------------------------------------------------------------
Date \1\ Type Date \1\ Type----------------------------------------------------------------------------------------------------------------Denver-Boulder-Greeley-Ft. Collins- ......... Nonattainment ......... Marginal.
Loveland, CO: \2\.
Adams County
Arapahoe County
Boulder County
Broomfield County
Denver County
Douglas County
Jefferson County
Larimer County (part)
That portion of the county
that lies south of a line
described as follows:
Beginning at a point on
Larimer County's eastern
boundary and Weld County's
western boundary
intersected by 40 degrees,
42 minutes, and 47.1
seconds north latitude,
proceed west to a point
defined by the intersection
of 40 degrees, 42 minutes,
47.1 seconds north latitude
and 105 degrees, 29
minutes, and 40.0 seconds
west longitude, thence
proceed south on 105
degrees, 29 minutes, 40.0
seconds west longitude to
the intersection with 40
degrees, 33 minutes and
17.4 seconds north
latitude, thence proceed
west on 40 degrees, 33
minutes, 17.4 seconds north
latitude until this line
intersects Larimer County's
western boundary and Grand
County's eastern boundary.
Weld County (part)
That portion of the county
that lies south of a line
described as follows:
Beginning at a point on
Weld County's eastern
boundary and Logan County's
western boundary
intersected by 40 degrees,
42 minutes, 47.1 seconds
north latitude, proceed
west on 40 degrees, 42
minutes, 47.1 seconds north
latitude until this line
intersects Weld County's
western boundary and
Larimer County's eastern
boundary.Southern Ute Indian Tribe of the ......... Unclassifiable/Attainment
Southern Ute Reservation \3\.Rest of State and Rest of Indian ......... Unclassifiable/Attainment
Country.----------------------------------------------------------------------------------------------------------------\1\ This date is July 20, 2012, unless otherwise noted.\2\ Excludes Indian country located in each area, unless otherwise noted.\3\ Includes Indian country of the tribe listed in this table located in the identified area. Information
pertaining to areas of Indian country in this table is intended for CAA planning purposes only and is not an
EPA determination of Indian country status or any Indian country boundary. EPA lacks the authority to
establish Indian country land status, and is making no determination of Indian country boundaries, in this
table.
Colorado--2008 Lead NAAQS----------------------------------------------------------------------------------------------------------------
Designation for the 2008 NAAQS \a\
Designated area ------------------------------------------------------------------
Date \1\ Type----------------------------------------------------------------------------------------------------------------Whole State.................................. .............. Unclassifiable/Attainment.----------------------------------------------------------------------------------------------------------------\a\ Includes Indian Country located in each county or area, except as otherwise specified.\1\ December 31, 2011 unless otherwise noted. [43 FR 8964, Mar. 3, 1978]
Editorial Note: For Federal Register citations affecting Sec. 81.306 see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.fdsys.gov.