Montana--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----------------------------------------------------------------------------------------------------------------Laurel Area............................................. XEast Helena Area........................................ X XAnaconda Area........................................... ............ ............ ............ XRest of State........................................... ............ ............ ............ X----------------------------------------------------------------------------------------------------------------
Montana--2010 Sulfur Dioxide NAAQS (Primary)------------------------------------------------------------------------
Designation
Designated area ----------------------------------------
Date Type------------------------------------------------------------------------Billings, MT \1\
Yellowstone County (part).. 10-4-13 Nonattainment.
The area originates at
the point defined as
the southwest corner
of Section 11,
Township 1S, Range
26E. From that point
the boundary proceeds
north along the
western section line
of Section 11 to the
point of intersection
with the midline of
Interstate Highway 90.
From that point the
boundary follows the
midline of Interstate
Highway 90, across the
Yellowstone River, to
the point where the
highway midline
intersects the
northern boundary of
Section 35, Township
1N, Range 26E. From
that point the
boundary proceeds east
along the northern
section line of
Sections 35 and 36 to
the point where Old US
87/Hardin Road leaves
the section line and
turns southeast. The
boundary follows the
midline of Old US 87/
Hardin Road southeast
to the point where the
road intersects the
western boundary of
the SE \1/4\ of the SE
\1/4\ of Section 31,
Township 1N, Range
27E. From that point
the boundary proceeds
south along the \1/4\
section line to the
southern boundary of
Township 1N, then east
to the northeast
corner of Section 5,
Township 1S, Range
27E. The boundary then
proceeds south along
the eastern section
line of sections 5 and
8 to the southeast
corner of Section 8,
Township 1S, Range
27E, where it turns
west and follows the
south section line of
Sections 8 and 7,
Township 1S, Range
27E; and Sections 12
and 11, Township 1S,
Range 26E, back to the
point of origin------------------------------------------------------------------------\1\ Excludes Indian country located in each area, if any, unless
otherwise specified.
Montana--Carbon Monoxide----------------------------------------------------------------------------------------------------------------
Designation Classification
Designated Area -----------------------------------------------------------------------------
Date \1\ Type Date \1\ Type----------------------------------------------------------------------------------------------------------------Billings Area
Yellowstone County (part):......
The following areas of April 22, Attainment
Yellowstone Co. (Range and 2002.
Township) sections: R25E T1N--
Sections 24 through 27 and 34
through 36; R25E T1S--
Sections 1, 2, and 12; R26E
T1N Sections 19 through 22
and 27 through 34; R26E T1S
Sections 2 through 11 and 15
through 18..Great Falls Area.................. July 8, 2002 Attainment
Cascade County (part).........
Great Falls designated area:
North boundary--9th Avenue
South or its straight line
extension; East boundary--
54th Street South or its
straight line extension;
South boundary--11th Avenue
South or its straight line
extension; West boundary--2nd
Street South or its straight
line extension.Missoula Area:....................
Missoula County (part).......... September 17, Attainment
2007
Missoula and vicinity
including the following
(Range and Township)
sections: R19W T14N--
sections: 29 and 32; R19W
T13N--sections 2, 5, 7, 8,
11, 14 through 24, and 26
through 34; R19W T12N--
sections: 4 through 7; R20W
T13N--sections: 23 through
26, 35 and 36.Beaverhead County................. .............. Unclassifiable/AttainmentBig Horn County (part)............ .............. Unclassifiable/Attainment
excluding Crow, Northern Cheyenne
Indian Reservations.Blaine County (part).............. .............. Unclassifiable/Attainment
excluding Fort Belknap Indian
Reservation.Broadwater County................. .............. Unclassifiable/AttainmentCarbon County..................... .............. Unclassifiable/AttainmentCarter County..................... .............. Unclassifiable/AttainmentCascade County (part)
Remainder of Cascade County..... .............. Unclassifiable/AttainmentChouteau County (part)............ .............. Unclassifiable/Attainment
excluding Rocky Boy Indian
Reservation.Custer County..................... .............. Unclassifiable/AttainmentDaniels County (part)............. .............. Unclassifiable/Attainment
excluding Fort Peck Indian
Reservation.Dawson County..................... .............. Unclassifiable/AttainmentDeer Lodge County................. .............. Unclassifiable/AttainmentFallon County..................... .............. Unclassifiable/AttainmentFergus County..................... .............. Unclassifiable/AttainmentFlathead County (part)............ .............. Unclassifiable/Attainment
excluding Flathead Indian
Resevation.Gallatin County................... .............. Unclassifiable/AttainmentGarfield County................... .............. Unclassifiable/AttainmentGlacier County (part)............. .............. Unclassifiable/Attainment
excluding Blackfeet Indian
Reservation.Golden Valley County.............. .............. Unclassifiable/AttainmentGranite County.................... .............. Unclassifiable/AttainmentHill County (part)................ .............. Unclassifiable/Attainment
excluding Rocky Boy Indian
Reservation.Jefferson County.................. .............. Unclassifiable/AttainmentJudith Basin County............... .............. Unclassifiable/AttainmentLake County (part)................ .............. Unclassifiable/Attainment
excluding Flathead Indian
Reservation.Lewis and Clark County............ .............. Unclassifiable/AttainmentLiberty County.................... .............. Unclassifiable/AttainmentLincoln County.................... .............. Unclassifiable/AttainmentMadison County.................... .............. Unclassifiable/AttainmentMcCone County..................... .............. Unclassifiable/AttainmentMeagher County.................... .............. Unclassifiable/AttainmentMineral County.................... .............. Unclassifiable/AttainmentMissoula County (part)
Remainder of Missoula County.... .............. Unclassifiable/AttainmentMusselshell County................ .............. Unclassifiable/AttainmentPark County....................... .............. Unclassifiable/AttainmentPetroleum County.................. .............. Unclassifiable/AttainmentPhillips County (part)............ .............. Unclassifiable/Attainment
excluding Fort Belknap Indian
Reservation.Pondera County (part)............. .............. Unclassifiable/Attainment
excluding Blackfeet Indian
Reservation.Powder River County............... .............. Unclassifiable/AttainmentPowell County..................... .............. Unclassifiable/Attainment
Prairie County.................... .............. Unclassifiable/AttainmentRavalli County.................... .............. Unclassifiable/AttainmentRichland County................... .............. Unclassifiable/AttainmentRoosevelt County (part)........... .............. Unclassifiable/Attainment
excluding Fort Peck Indian
Reservation.Rosebud County (part)............. .............. Unclassifiable/Attainment
excluding Northern Cheyenne
Indian Reservation.Sanders County (part)............. .............. Unclassifiable/Attainment
excluding Flathead Indian
Reservation.Sheridan County (part)............ .............. Unclassifiable/Attainment
excluding Fort Peck Indian
Reservation.Silver Bow County................. .............. Unclassifiable/AttainmentStillwater County................. .............. Unclassifiable/AttainmentSweet Grass County................ .............. Unclassifiable/AttainmentTeton County...................... .............. Unclassifiable/AttainmentToole County...................... .............. Unclassifiable/AttainmentTreasure County................... .............. Unclassifiable/AttainmentValley County (part).............. .............. Unclassifiable/Attainment
excluding Fort Peck Indian
Reservation.Wheatland County.................. .............. Unclassifiable/AttainmentWibaux County..................... .............. Unclassifiable/AttainmentYellowstone County (part)
Remainder of Yellowstone County. .............. Unclassifiable/AttainmentYellowstone National Park......... .............. Unclassifiable/AttainmentBlackfeet Indian Reservation...... .............. Unclassifiable/Attainment
Glacier County (part)
area inside Blackfeet
Reservation
Pondera County (part)
area inside Blackfeet
ReservationCrow Indian Reservation........... .............. Unclassifiable/Attainment
Bighorn County (part)
area inside Crow Reservation
Yellowstone (part)
area inside Crow ReservationFlathead Indian Reservation....... .............. Unclassifiable/Attainment
Flathead County (part)
area inside Flathead
Reservation
Lake County (part)
area inside Flathead
Reservation
Missoula County (part)
area inside Flathead
Reservation
Sanders County (part)
area inside Flathead
ReservationFort Belknap Indian Reservation... .............. Unclassifiable/Attainment
Blaine County (part)
area inside Fort Belknap
Reservation
Phillips County (part)
area inside Fort Belknap
ReservationFort Peck Indian Reservation...... .............. Unclassifiable/Attainment
Daniels County (part)
area inside Fort Peck
Reservation
Roosevelt County (part)
area inside Fort Peck
Reservation
Sheridan County (part)
area inside Fort Peck
Reservation
Valley County (part)
area inside Fort Peck
ReservationNorthern Cheyenne Indian .............. Unclassifiable/Attainment
Reservation.
Bighorn County (part)
area inside Northern Cheyenne
Reservation
Rosebud County (part)
area inside Northern Cheyenne
ReservationRocky Boy Indian Reservation...... .............. Unclassifiable/Attainment
Chouteau County (part)
area inside Rocky Boy
Reservation
Hill County (part)
area inside Rocky Boy
Reservation----------------------------------------------------------------------------------------------------------------\1\ This date is November 15, 1990, unless otherwise noted.
Montana--1978 Lead NAAQS----------------------------------------------------------------------------------------------------------------
Designation Classification
Designated Area -------------------------------------------------------------------------
Date Type Date Type----------------------------------------------------------------------------------------------------------------Lewis & Clark County (part)
City of East Helena and vicinity.... 1/6/92 Nonattainment
Northern boundary - horizontal
universal transverse
mercatur(UTM) 5,162,000 mN;
eastern boundary - vertical UTM
432,500 mE; southern boundary -
horizontal UTM 5,158,000 mN;
western boundary - vertical UTM
427,000 mERest of State Not Designated----------------------------------------------------------------------------------------------------------------
Montana--Ozone (1-Hour Standard)\2\----------------------------------------------------------------------------------------------------------------
Designation Classification
Designated area ---------------------------------------------------------------------------
Date \1\ Type Date \1\ Type----------------------------------------------------------------------------------------------------------------Beaverhead County................... ......... Unclassifiable/AttainmentBig Horn County (part) excluding ......... Unclassifiable/Attainment
Crow, Northern Cheyenne Indian
Reservations.Blaine County (part) excluding Fort
Belknap Indian ReservationBroadwater County................... ......... Unclassifiable/AttainmentCarbon County....................... ......... Unclassifiable/AttainmentCarter County....................... ......... Unclassifiable/AttainmentCascade County...................... ......... Unclassifiable/AttainmentChouteau County (part) excluding ......... Unclassifiable/Attainment
Rocky Boy Indian Reservation.Custer County....................... ......... Unclassifiable/AttainmentDaniels County (part) excluding Fort ......... Unclassifiable/Attainment
Peck Indian Reservation.Dawson County....................... ......... Unclassifiable/AttainmentDeer Lodge County................... ......... Unclassifiable/AttainmentFallon County....................... ......... Unclassifiable/AttainmentFergus County....................... ......... Unclassifiable/AttainmentFlathead County (part) excluding ......... Unclassifiable/Attainment
Flathead Indian Reservation.Gallatin County..................... ......... Unclassifiable/AttainmentGarfield County..................... ......... Unclassifiable/AttainmentGlacier County (part) excluding ......... Unclassifiable/Attainment
Blackfeet Indian Reservation.Golden Valley County................ ......... Unclassifiable/AttainmentGranite County...................... ......... Unclassifiable/AttainmentHill County (part) excluding Rocky ......... Unclassifiable/Attainment
Boy Indian Reservation.Jefferson County.................... ......... Unclassifiable/AttainmentJudith Basin County................. ......... Unclassifiable/AttainmentLake County (part) excluding ......... Unclassifiable/Attainment
Flathead Indian Reservation.Lewis and Clark County.............. ......... Unclassifiable/AttainmentLiberty County...................... ......... Unclassifiable/AttainmentLincoln County...................... ......... Unclassifiable/AttainmentMadison County...................... ......... Unclassifiable/AttainmentMcCone County....................... ......... Unclassifiable/AttainmentMeagher County...................... ......... Unclassifiable/AttainmentMineral County...................... ......... Unclassifiable/AttainmentMissoula County (part) excluding ......... Unclassifiable/Attainment
Flathead Indian Reservation.Musselshell County.................. ......... Unclassifiable/AttainmentPark County......................... ......... Unclassifiable/AttainmentPetroleum County.................... ......... Unclassifiable/AttainmentPhillips County (part) excluding ......... Unclassifiable/Attainment
Fort Belknap Indian Reservation.Pondera County (part) excluding ......... Unclassifiable/Attainment
Blackfeet Indian Reservation.Powder River County................. ......... Unclassifiable/AttainmentPowell County....................... ......... Unclassifiable/AttainmentPrairie County...................... ......... Unclassifiable/AttainmentRavalli County...................... ......... Unclassifiable/AttainmentRichland County..................... ......... Unclassifiable/AttainmentRoosevelt County (part) excluding ......... Unclassifiable/Attainment
Fort Peck Indian Reservation.
Rosebud County (part) excluding ......... Unclassifiable/Attainment
Northern Cheyenne Indian
Reservation.Sanders County (part) excluding ......... Unclassifiable/Attainment
Flathead Indian Reservation.Sheridan County (part) excluding ......... Unclassifiable/Attainment
Fort Peck Indian Reservation.Silver Bow County................... ......... Unclassifiable/AttainmentStillwater County................... ......... Unclassifiable/AttainmentSweet Grass County.................. ......... Unclassifiable/AttainmentTeton County........................ ......... Unclassifiable/AttainmentToole County........................ ......... Unclassifiable/AttainmentTreasure County..................... ......... Unclassifiable/AttainmentValley County (part) excluding Fort ......... Unclassifiable/Attainment
Peck Indian Reservation.Wheatland County.................... ......... Unclassifiable/AttainmentWibaux County....................... ......... Unclassifiable/AttainmentYellowstone County (part) excluding ......... Unclassifiable/Attainment
Crow Indian Reservation.Yellowstone Natl Park............... ......... Unclassifiable/AttainmentBlackfeet Indian Reservation........ ......... Unclassifiable/Attainment
Glacier County (part) area
inside Blackfeet Reservation
Pondera County (part) area
inside Blackfeet ReservationCrow Indian Reservation............. ......... Unclassifiable/Attainment
Bighorn County (part) area
inside Crow ReservationYellowstone (part) area inside Crow
ReservationFlathead Indian Reservation......... ......... Unclassifiable/Attainment
Flathead County (part) area
inside Flathead Reservation
Lake County (part) area inside
Flathead Reservation
Missoula County (part) area
inside Flathead Reservation
Sanders County (part) area
inside Flathead ReservationFort Belknap Indian Reservation..... ......... Unclassifiable/Attainment
Blaine County (part) area inside
Fort Belknap Reservation
Phillips County (part) area
inside Fort Belknap ReservationFort Peck Indian Reservation........ ......... Unclassifiable/Attainment
Daniels County (part) area
inside Fort Peck Reservation
Roosevelt County (part) area
inside Fort Peck Reservation
Sheridan County (part) area
inside Fort Peck Reservation
Valley County (part) area inside
Fort Peck ReservationNorthern Cheyenne Indian Reservation ......... Unclassifiable/Attainment
Bighorn County (part) area
inside Northern Cheyenne
Reservation
Rosebud County (part) area
inside Northern Cheyenne
ReservationRocky Boy Indian Reservation........ ......... Unclassifiable/Attainment
Chouteau County (part) area
inside Rocky Boy Reservation
Hill County (part) area inside
Rocky Boy Reservation----------------------------------------------------------------------------------------------------------------\1\ This date is October 18, 2000, unless otherwise noted.\2\ The 1-hour ozone standard is revoked effective June 15, 2005 for all areas in Montana.
Montana--PM-10----------------------------------------------------------------------------------------------------------------
Designation Classification
Designated Area -------------------------------------------------------------------------
Date Type Date Type----------------------------------------------------------------------------------------------------------------Cascade County, Great Falls area...... 11/15/90 Unclassifiable
Flathead County:
The area bounded by lines from 11/15/90 Nonattainment 11/15/90 Moderate.
Universal Transmercator (UTM)
coordinate 700000mE, 5347000mN,
east to 704000mE, 5347000mN,
south to 704000mE, 5341000mN,
west to 703000mE, 5341000mN,
south to 703000mE, 5340000mN,
west to 702000mE, 5340000mN,
south to 702000mE, 5339000mN,
east to 703000mE, 5339000mN,
south to 703000mE, 5338000mN,
east to 704000mE, 5338000mN,
south to 704000mE, 5336000mN,
west to 702000mE, 5336000mN,
south to 702000mE, 5335000mN,
west to 700000mE, 5335000mN,
north to 700000mE, 5340000mN,
west to 695000mE, 5340000mN,
north to 695000mE, 5345000mN,
east to 700000mE, 5345000mN,
north to 700000mE, 5347000mN.
Columbia Falls and vicinity....... 11/15/90 Nonattainment 11/15/90 Moderate.
Township T30N, R20W--Sections 7,
8, 9, 16, 17, and 18
The City of Whitefish and 11/18/93 Nonattainment 11/18/93 Moderate.
surrounding vicinity bounded by
lines from Universal
Transmercator (UTM) coordinates
695000 mE, 5370000 mN, east to
699000 mE, 5370000 mN, south to
699000 mE, 5361000 mN, west to
695000 mN, 5361000 mN, and north
to 695000 mE, 5370000 mN.Lake County, Ronan, Polson............ 11/15/90 Nonattainment 11/15/90 Moderate.Lincoln County, Libby and vicinity.... 11/15/90 Nonattainment 11/15/90 Moderate.T30N, R31W--Sections 2, 3, 4, 5, 9,
10, 11, 14, 15, 23, 26, 35, and west
\1/2\ of Section 24, west \1/2\ of
Section 25, and west \1/2\ of Section
36; plus T31N, R31W--Sections 26, 27,
29, 32, 33, 34, 35 and the east \1/2\
of Section 30.Lewis and Clark County, East Helena 11/15/90 Unclassifiable
area.Missoula County, Missoula and vicinity 11/15/90 Nonattainment 11/15/90 Moderate.
including the following sections:T13N, R19W--2, 8, 11, 14, 15, 16, 17,
19, 20, 21, 22, 23, 24, 27, 28, 29,
30, 31, 32, 33, and 34; T12N, R19W--
Sections 4, 5, 6, 7; T13N, R20W--
Sections 23, 24, 25, 26, 35, and 36.Rosebud County:
Lame Deer......................... 11/15/90 Nonattainment 11/15/90 Moderate.
Colstrip area..................... 11/15/90 Unclassifiable
Sanders County (part)............. 1/20/94 Nonattainment 1/20/94 Moderate.Thompson Falls and vicinity: Including
the following Sections: R29W, T21N--
Sections 5, 6, 7, 8, 9, 10, 15, and
16.Silver Bow County, Butte.............. 11/15/90 Nonattainment 11/15/90 Moderate.
The following area of Butte-Silver Bow
excluding the territorial limits of
the City of Walkerville: Beginning at
the Northwest corner of Section 2,
T.3N., R.8W., thence Easterly to
Northeast corner Section 5, T.3N.,
R.7W.; then Southerly to Northwest
corner Section 9, T.3N., R.7W.;
thence Easterly to Northeast corner
Section 10, T.3N., R.7W.; thence
Southerly to Southeast corner Section
22, T.2N., R.7W.; thence Westerly to
Southwest corner Section 19, T.2N.,
R.7W.; thence Northerly to Northwest
corner Section 19, T.2N., R.7W.;
thence Westerly to Southwest corner
Section 14, T.2N., R.8W.; thence
Northerly to Southwest corner Section
35, T.3N., R.8W.; thence Westerly to
Southwest corner Section 34, T.3N.,
R.8W.; thence Northerly to Northwest
corner Section 27, T.3N., R.8W.;
thence Westerly to Southwest corner
Section 20, T.3N., R.8W.; thence
Northerly to Northwest corner Section
17, T.3N., R.8W.; thence Easterly to
Northwest corner Section 14, T.3N.,
R.8W.; thence Northerly to the point
of beginning.Yellowstone County, Billings area..... 11/15/90 UnclassifiableRest of State\1\...................... 11/15/90 Unclassifiable----------------------------------------------------------------------------------------------------------------\1\ Denotes a single area designation for PSD baseline area purposes.
Montana--1997 Annual PM2.5 NAAQS
[Primary and secondary]----------------------------------------------------------------------------------------------------------------
Designation \a\ Classification
Designated area -----------------------------------------------------------------------------
Date \1\ Type Date \2\ Type----------------------------------------------------------------------------------------------------------------Libby, MT:
Lincoln County (part)......... .............. Nonattainment........ .............. Moderate.
The area bounded by lines
from Universal Transverse
Mercador Zone 11 (North
American Datum 1983)
coordinates beginning at
600,000mE, 5,370,000mN
east to 620,000mE,
5370,000mN south to
620,000mE, 5340,000mN
west to 600,000mE,
5,340,000mN north to
600,000mE, 5,370,000mN.Rest of State:
Beaverhead County............. .............. Unclassifiable/
Attainment.
Big Horn County............... .............. Unclassifiable/
Attainment.
Blaine County................. .............. Unclassifiable/
Attainment.
Broadwater County............. .............. Unclassifiable/
Attainment.
Carbon County................. .............. Unclassifiable/
Attainment.
Carter County................. .............. Unclassifiable/
Attainment.
Cascade County................ .............. Unclassifiable/
Attainment.
Chouteau County............... .............. Unclassifiable/
Attainment.
Custer County................. .............. Unclassifiable/
Attainment.
Daniels County................ .............. Unclassifiable/
Attainment.
Dawson County................. .............. Unclassifiable/
Attainment.
Deer Lodge County............. .............. Unclassifiable/
Attainment.
Fallon County................. .............. Unclassifiable/
Attainment.
Fergus County................. .............. Unclassifiable/
Attainment.
Flathead County............... .............. Unclassifiable/
Attainment.
Gallatin County............... .............. Unclassifiable/
Attainment.
Garfield County............... .............. Unclassifiable/
Attainment.
Glacier County................ .............. Unclassifiable/
Attainment.
Golden Valley County.......... .............. Unclassifiable/
Attainment.
Granite County................ .............. Unclassifiable/
Attainment.
Hill County................... .............. Unclassifiable/
Attainment.
Jefferson County.............. .............. Unclassifiable/
Attainment.
Judith Basin County........... .............. Unclassifiable/
Attainment.
Lake County................... .............. Unclassifiable/
Attainment.
Lewis and Clark County........ .............. Unclassifiable/
Attainment.
Liberty County................ .............. Unclassifiable/
Attainment.
Lincoln County (remainder).... .............. Unclassifiable/
Attainment.
McCone County................. .............. Unclassifiable/
Attainment.
Madison County................ .............. Unclassifiable/
Attainment.
Meagher County................ .............. Unclassifiable/
Attainment.
Mineral County................ .............. Unclassifiable/
Attainment.
Missoula County............... .............. Unclassifiable/
Attainment.
Musselshell County............ .............. Unclassifiable/
Attainment.
Park County................... .............. Unclassifiable/
Attainment.
Petroleum County.............. .............. Unclassifiable/
Attainment.
Phillips County............... .............. Unclassifiable/
Attainment.
Pondera County................ .............. Unclassifiable/
Attainment.
Powder River County........... .............. Unclassifiable/
Attainment.
Powell County................. .............. Unclassifiable/
Attainment.
Prairie County................ .............. Unclassifiable/
Attainment.
Ravalli County................ .............. Unclassifiable/
Attainment.
Richland County............... .............. Unclassifiable/
Attainment.
Roosevelt County.............. .............. Unclassifiable/
Attainment.
Rosebud County................ .............. Unclassifiable/
Attainment.
Sanders County................ .............. Unclassifiable/
Attainment.
Sheridan County............... .............. Unclassifiable/
Attainment.
Silver Bow County............. .............. Unclassifiable/
Attainment.
Stillwater County............. .............. Unclassifiable/
Attainment.
Sweet Grass County............ .............. Unclassifiable/
Attainment.
Teton County.................. .............. Unclassifiable/
Attainment.
Toole County.................. .............. Unclassifiable/
Attainment.
Treasure County............... .............. Unclassifiable/
Attainment.
Valley County................. .............. Unclassifiable/
Attainment.
Wheatland County.............. .............. Unclassifiable/
Attainment.
Wibaux County................. .............. Unclassifiable/
Attainment.
Yellowstone 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.\2\ This date is July 2, 2014, unless otherwise noted.
Montana--2012 Annual PM2.5 NAAQS
[Primary]--------------------------------------------------------------------------------------------------------------------------------------------------------
Designation Classification
Designated area \1\ ---------------------------------------------------------------------------------------------------------------
Date \2\ Type Date \2\ Type--------------------------------------------------------------------------------------------------------------------------------------------------------Statewide:
Beaverhead County................... ........... Unclassifiable/Attainment................
Big Horn County..................... ........... Unclassifiable/Attainment................
Blaine County....................... ........... Unclassifiable/Attainment................
Broadwater County................... ........... Unclassifiable/Attainment................
Carbon County....................... ........... Unclassifiable/Attainment................
Carter County....................... ........... Unclassifiable/Attainment................
Cascade County...................... ........... Unclassifiable/Attainment................
Chouteau County..................... ........... Unclassifiable/Attainment................
Custer County....................... ........... Unclassifiable/Attainment................
Daniels County...................... ........... Unclassifiable/Attainment................
Dawson County....................... ........... Unclassifiable/Attainment................
Deer Lodge County................... ........... Unclassifiable/Attainment................
Fallon County....................... ........... Unclassifiable/Attainment................
Fergus County....................... ........... Unclassifiable/Attainment................
Flathead County..................... ........... Unclassifiable/Attainment................
Gallatin County..................... ........... Unclassifiable/Attainment................
Garfield County..................... ........... Unclassifiable/Attainment................
Glacier County...................... ........... Unclassifiable/Attainment................
Golden Valley County................ ........... Unclassifiable/Attainment................
Granite County...................... ........... Unclassifiable/Attainment................
Hill County......................... ........... Unclassifiable/Attainment................
Jefferson County.................... ........... Unclassifiable/Attainment................
Judith Basin County................. ........... Unclassifiable/Attainment................
Lake County......................... ........... Unclassifiable/Attainment................
Lewis and Clark County.............. ........... Unclassifiable/Attainment................
Liberty County...................... ........... Unclassifiable/Attainment................
Lincoln County...................... ........... Unclassifiable/Attainment................
McCone County....................... ........... Unclassifiable/Attainment................
Madison County...................... ........... Unclassifiable/Attainment................
Meagher County...................... ........... Unclassifiable/Attainment................
Mineral County...................... ........... Unclassifiable/Attainment................
Missoula County..................... ........... Unclassifiable/Attainment................
Musselshell County.................. ........... Unclassifiable/Attainment................
Park County......................... ........... Unclassifiable/Attainment................
Petroleum County.................... ........... Unclassifiable/Attainment................
Phillips County..................... ........... Unclassifiable/Attainment................
Pondera County...................... ........... Unclassifiable/Attainment................
Powder River County................. ........... Unclassifiable/Attainment................
Powell County....................... ........... Unclassifiable/Attainment................
Prairie County...................... ........... Unclassifiable/Attainment................
Ravalli County...................... ........... Unclassifiable/Attainment................
Richland County..................... ........... Unclassifiable/Attainment................
Roosevelt County.................... ........... Unclassifiable/Attainment................
Rosebud County...................... ........... Unclassifiable/Attainment................
Sanders County...................... ........... Unclassifiable/Attainment................
Sheridan County..................... ........... Unclassifiable/Attainment................
Silver Bow County................... ........... Unclassifiable/Attainment................
Stillwater County................... ........... Unclassifiable/Attainment................
Sweet Grass County.................. ........... Unclassifiable/Attainment................
Teton County........................ ........... Unclassifiable/Attainment................
Toole County........................ ........... Unclassifiable/Attainment................
Treasure County..................... ........... Unclassifiable/Attainment................
Valley County....................... ........... Unclassifiable/Attainment................
Wheatland County.................... ........... Unclassifiable/Attainment................
Wibaux County....................... ........... Unclassifiable/Attainment................
Yellowstone 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.
Montana--1997 24-Hour PM2.5 NAAQS
[Primary and secondary]----------------------------------------------------------------------------------------------------------------
Designation \a\ Classification
Designated area -----------------------------------------------------------------------------
Date \1\ Type Date Type----------------------------------------------------------------------------------------------------------------Statewide:
Beaverhead County............. .............. Unclassifiable/
Attainment.
Big Horn County............... .............. Unclassifiable/
Attainment.
Blaine County................. .............. Unclassifiable/
Attainment.
Broadwater County............. .............. Unclassifiable/
Attainment.
Carbon County................. .............. Unclassifiable/
Attainment.
Carter County................. .............. Unclassifiable/
Attainment.
Cascade County................ .............. Unclassifiable/
Attainment.
Chouteau County............... .............. Unclassifiable/
Attainment.
Custer County................. .............. Unclassifiable/
Attainment.
Daniels County................ .............. Unclassifiable/
Attainment.
Dawson County................. .............. Unclassifiable/
Attainment.
Deer Lodge County............. .............. Unclassifiable/
Attainment.
Fallon County................. .............. Unclassifiable/
Attainment.
Fergus County................. .............. Unclassifiable/
Attainment.
Flathead County............... .............. Unclassifiable/
Attainment.
Gallatin County............... .............. Unclassifiable/
Attainment.
Garfield County............... .............. Unclassifiable/
Attainment.
Glacier County................ .............. Unclassifiable/
Attainment.
Golden Valley County.......... .............. Unclassifiable/
Attainment.
Granite County................ .............. Unclassifiable/
Attainment.
Hill County................... .............. Unclassifiable/
Attainment.
Jefferson County.............. .............. Unclassifiable/
Attainment.
Judith Basin County........... .............. Unclassifiable/
Attainment.
Lake County................... .............. Unclassifiable/
Attainment.
Lewis and Clark County........ .............. Unclassifiable/
Attainment.
Liberty County................ .............. Unclassifiable/
Attainment.
Lincoln County................ .............. Unclassifiable/
Attainment.
McCone County................. .............. Unclassifiable/
Attainment.
Madison County................ .............. Unclassifiable/
Attainment.
Meagher County................ .............. Unclassifiable/
Attainment.
Mineral County................ .............. Unclassifiable/
Attainment.
Missoula County............... .............. Unclassifiable/
Attainment.
Musselshell County............ .............. Unclassifiable/
Attainment.
Park County................... .............. Unclassifiable/
Attainment.
Petroleum County.............. .............. Unclassifiable/
Attainment.
Phillips County............... .............. Unclassifiable/
Attainment.
Pondera County................ .............. Unclassifiable/
Attainment.
Powder River County........... .............. Unclassifiable/
Attainment.
Powell County................. .............. Unclassifiable/
Attainment.
Prairie County................ .............. Unclassifiable/
Attainment.
Ravalli County................ .............. Unclassifiable/
Attainment.
Richland County............... .............. Unclassifiable/
Attainment.
Roosevelt County.............. .............. Unclassifiable/
Attainment.
Rosebud County................ .............. Unclassifiable/
Attainment.
Sanders County................ .............. Unclassifiable/
Attainment.
Sheridan County............... .............. Unclassifiable/
Attainment.
Silver Bow County............. .............. Unclassifiable/
Attainment.
Stillwater County............. .............. Unclassifiable/
Attainment.
Sweet Grass County............ .............. Unclassifiable/
Attainment.
Teton County.................. .............. Unclassifiable/
Attainment.
Toole County.................. .............. Unclassifiable/
Attainment.
Treasure County............... .............. Unclassifiable/
Attainment.
Valley County................. .............. Unclassifiable/
Attainment.
Wheatland County.............. .............. Unclassifiable/
Attainment.
Wibaux County................. .............. Unclassifiable/
Attainment.
Yellowstone 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.
Montana--2006 24-Hour PM2.5 NAAQS
[Primary and secondary]----------------------------------------------------------------------------------------------------------------
Designation \a\ Classification
Designated area -----------------------------------------------------------------------------
Date \1\ Type Date Type----------------------------------------------------------------------------------------------------------------Statewide:
Beaverhead County............. .............. Unclassifiable/
Attainment.
Big Horn County............... .............. Unclassifiable/
Attainment.
Blaine County................. .............. Unclassifiable/
Attainment.
Broadwater County............. .............. Unclassifiable/
Attainment.
Carbon County................. .............. Unclassifiable/
Attainment.
Carter County................. .............. Unclassifiable/
Attainment.
Cascade County................ .............. Unclassifiable/
Attainment.
Chouteau County............... .............. Unclassifiable/
Attainment.
Custer County................. .............. Unclassifiable/
Attainment.
Daniels County................ .............. Unclassifiable/
Attainment.
Dawson County................. .............. Unclassifiable/
Attainment.
Deer Lodge County............. .............. Unclassifiable/
Attainment.
Fallon County................. .............. Unclassifiable/
Attainment.
Fergus County................. .............. Unclassifiable/
Attainment.
Flathead County............... .............. Unclassifiable/
Attainment.
Gallatin County............... .............. Unclassifiable/
Attainment.
Garfield County............... .............. Unclassifiable/
Attainment.
Glacier County................ .............. Unclassifiable/
Attainment.
Golden Valley County.......... .............. Unclassifiable/
Attainment.
Granite County................ .............. Unclassifiable/
Attainment.
Hill County................... .............. Unclassifiable/
Attainment.
Jefferson County.............. .............. Unclassifiable/
Attainment.
Judith Basin County........... .............. Unclassifiable/
Attainment.
Lake County................... .............. Unclassifiable/
Attainment.
Lewis and Clark County........ .............. Unclassifiable/
Attainment.
Liberty County................ .............. Unclassifiable/
Attainment.
Lincoln County................ .............. Unclassifiable/
Attainment.
McCone County................. .............. Unclassifiable/
Attainment.
Madison County................ .............. Unclassifiable/
Attainment.
Meagher County................ .............. Unclassifiable/
Attainment.
Mineral County................ .............. Unclassifiable/
Attainment.
Missoula County............... .............. Unclassifiable/
Attainment.
Musselshell County............ .............. Unclassifiable/
Attainment.
Park County................... .............. Unclassifiable/
Attainment.
Petroleum County.............. .............. Unclassifiable/
Attainment.
Phillips County............... .............. Unclassifiable/
Attainment.
Pondera County................ .............. Unclassifiable/
Attainment.
Powder River County........... .............. Unclassifiable/
Attainment.
Powell County................. .............. Unclassifiable/
Attainment.
Prairie County................ .............. Unclassifiable/
Attainment.
Ravalli County................ .............. Unclassifiable/
Attainment.
Richland County............... .............. Unclassifiable/
Attainment.
Roosevelt County.............. .............. Unclassifiable/
Attainment.
Rosebud County................ .............. Unclassifiable/
Attainment.
Sanders County................ .............. Unclassifiable/
Attainment.
Sheridan County............... .............. Unclassifiable/
Attainment.
Silver Bow County............. .............. Unclassifiable/
Attainment.
Stillwater County............. .............. Unclassifiable/
Attainment.
Sweet Grass County............ .............. Unclassifiable/
Attainment.
Teton County.................. .............. Unclassifiable/
Attainment.
Toole County.................. .............. Unclassifiable/
Attainment.
Treasure County............... .............. Unclassifiable/
Attainment.
Valley County................. .............. Unclassifiable/
Attainment.
Wheatland County.............. .............. Unclassifiable/
Attainment.
Wibaux County................. .............. Unclassifiable/
Attainment.
Yellowstone 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.
Montana--NO2 (1971 Annual Standard)------------------------------------------------------------------------
Cannot be
Does not classified or
Designated area meet primary better than
standards national
standards------------------------------------------------------------------------Entire State............................ ............ X------------------------------------------------------------------------
Montana--NO2 (2010 1-Hour Standard)----------------------------------------------------------------------------------------------------------------
Designation \a\
Designated area ------------------------------------------------------------------
Date \1\ Type----------------------------------------------------------------------------------------------------------------Beaverhead County............................ ........... Unclassifiable/Attainment.Big Horn County.............................. ........... Unclassifiable/Attainment.Blaine County................................ ........... Unclassifiable/Attainment.Broadwater County............................ ........... Unclassifiable/Attainment.Carbon County................................ ........... Unclassifiable/Attainment.Carter County................................ ........... Unclassifiable/Attainment.Cascade County............................... ........... Unclassifiable/Attainment.Chouteau County.............................. ........... Unclassifiable/Attainment.Custer County................................ ........... Unclassifiable/Attainment.Daniels County............................... ........... Unclassifiable/Attainment.Dawson County................................ ........... Unclassifiable/Attainment.Deer Lodge County............................ ........... Unclassifiable/Attainment.Fallon County................................ ........... Unclassifiable/Attainment.Fergus County................................ ........... Unclassifiable/Attainment.Flathead County.............................. ........... Unclassifiable/Attainment.Gallatin County.............................. ........... Unclassifiable/Attainment.Garfield County.............................. ........... Unclassifiable/Attainment.Glacier County............................... ........... Unclassifiable/Attainment.Golden Valley County......................... ........... Unclassifiable/Attainment.Granite County............................... ........... Unclassifiable/Attainment.
Hill County.................................. ........... Unclassifiable/Attainment.Jefferson County............................. ........... Unclassifiable/Attainment.Judith Basin County.......................... ........... Unclassifiable/Attainment.Lake County.................................. ........... Unclassifiable/Attainment.Lewis and Clark County....................... ........... Unclassifiable/Attainment.Liberty County............................... ........... Unclassifiable/Attainment.Lincoln County............................... ........... Unclassifiable/Attainment.McCone County................................ ........... Unclassifiable/Attainment.Madison County............................... ........... Unclassifiable/Attainment.Meagher County............................... ........... Unclassifiable/Attainment.Mineral County............................... ........... Unclassifiable/Attainment.Missoula County.............................. ........... Unclassifiable/Attainment.Musselshell County........................... ........... Unclassifiable/Attainment.Park County.................................. ........... Unclassifiable/Attainment.Petroleum County............................. ........... Unclassifiable/Attainment.Phillips County.............................. ........... Unclassifiable/Attainment.Pondera County............................... ........... Unclassifiable/Attainment.Powder River County.......................... ........... Unclassifiable/Attainment.Powell County................................ ........... Unclassifiable/Attainment.Prairie County............................... ........... Unclassifiable/Attainment.Ravalli County............................... ........... Unclassifiable/Attainment.Richland County.............................. ........... Unclassifiable/Attainment.Roosevelt County............................. ........... Unclassifiable/Attainment.Rosebud County............................... ........... Unclassifiable/Attainment.Sanders County............................... ........... Unclassifiable/Attainment.Sheridan County.............................. ........... Unclassifiable/Attainment.Silver Bow County............................ ........... Unclassifiable/Attainment.Stillwater County............................ ........... Unclassifiable/Attainment.Sweet Grass County........................... ........... Unclassifiable/Attainment.Teton County................................. ........... Unclassifiable/Attainment.Toole County................................. ........... Unclassifiable/Attainment.Treasure County.............................. ........... Unclassifiable/Attainment.Valley County................................ ........... Unclassifiable/Attainment.Wheatland County............................. ........... Unclassifiable/Attainment.Wibaux County................................ ........... Unclassifiable/Attainment.Yellowstone 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.
Montana--1997 8-Hour Ozone NAAQS (Primary and Secondary)----------------------------------------------------------------------------------------------------------------
Designation \a\ Category/classification
Designated area ---------------------------------------------------------------------------
Date \1\ Type Date \1\ Type----------------------------------------------------------------------------------------------------------------Statewide:
Beaverhead County............... ......... Unclassifiable/Attainment
Big Horn County................. ......... Unclassifiable/Attainment
Blaine County................... ......... Unclassifiable/Attainment
Broadwater County............... ......... Unclassifiable/Attainment
Carbon County................... ......... Unclassifiable/Attainment
Carter County................... ......... Unclassifiable/Attainment
Cascade County.................. ......... Unclassifiable/Attainment
Chouteau County................. ......... Unclassifiable/Attainment
Custer County................... ......... Unclassifiable/Attainment
Daniels County.................. ......... Unclassifiable/Attainment
Dawson County................... ......... Unclassifiable/Attainment
Deer Lodge County............... ......... Unclassifiable/Attainment
Fallon County................... ......... Unclassifiable/Attainment
Fergus County................... ......... Unclassifiable/Attainment
Flathead County................. ......... Unclassifiable/Attainment
Gallatin County................. ......... Unclassifiable/Attainment
Garfield County................. ......... Unclassifiable/Attainment
Glacier County.................. ......... Unclassifiable/Attainment
Golden Valley County............ ......... Unclassifiable/Attainment
Granite County.................. ......... Unclassifiable/Attainment
Hill County..................... ......... Unclassifiable/Attainment
Jefferson County................ ......... Unclassifiable/Attainment
Judith Basin County............. ......... Unclassifiable/Attainment
Lake County..................... ......... Unclassifiable/Attainment
Lewis and Clark County.......... ......... Unclassifiable/Attainment
Liberty County.................. ......... Unclassifiable/Attainment
Lincoln County.................. ......... Unclassifiable/Attainment
Madison County.................. ......... Unclassifiable/Attainment
McCone County................... ......... Unclassifiable/Attainment
Meagher County.................. ......... Unclassifiable/Attainment
Mineral County.................. ......... Unclassifiable/Attainment
Missoula County................. ......... Unclassifiable/Attainment
Musselshell County.............. ......... Unclassifiable/Attainment
Park County..................... ......... Unclassifiable/Attainment
Petroleum County................ ......... Unclassifiable/Attainment
Phillips County................. ......... Unclassifiable/Attainment
Pondera County.................. ......... Unclassifiable/Attainment
Powder River County............. ......... Unclassifiable/Attainment
Powell County................... ......... Unclassifiable/Attainment
Prairie County.................. ......... Unclassifiable/Attainment
Ravalli County.................. ......... Unclassifiable/Attainment
Richland County................. ......... Unclassifiable/Attainment
Roosevelt County................ ......... Unclassifiable/Attainment
Rosebud County.................. ......... Unclassifiable/Attainment
Sanders County.................. ......... Unclassifiable/Attainment
Sheridan County................. ......... Unclassifiable/Attainment
Silver Bow County............... ......... Unclassifiable/Attainment
Stillwater County............... ......... Unclassifiable/Attainment
Sweet Grass County.............. ......... Unclassifiable/Attainment
Teton County.................... ......... Unclassifiable/Attainment
Toole County.................... ......... Unclassifiable/Attainment
Treasure County................. ......... Unclassifiable/Attainment
Valley County................... ......... Unclassifiable/Attainment
Wheatland County................ ......... Unclassifiable/Attainment
Wibaux County................... ......... Unclassifiable/Attainment
Yellowstone County.............. ......... Unclassifiable/Attainment
Yellowstone Natl Park........... ......... Unclassifiable/Attainment----------------------------------------------------------------------------------------------------------------\a\ Includes Indian Country located in each county or area, except as otherwise specified.\1\ This date is June 15, 2004, unless otherwise noted.
Montana--2008 8-Hour Ozone NAAQS (Primary and secondary)----------------------------------------------------------------------------------------------------------------
Designation Classification
Designated area ---------------------------------------------------------------------------
Date \1\ Type Date \1\ Type----------------------------------------------------------------------------------------------------------------Statewide and Any Areas of Indian ......... Unclassifiable/Attainment
Country.----------------------------------------------------------------------------------------------------------------\1\ This date is July 20, 2012, unless otherwise noted.
Montana--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. 81.327 see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.fdsys.gov.