Nonattainment Status for Each County by Year for Montana Including Previous 1-Hour Ozone Counties

As of December 14, 2012
Listed by County, Pollutant, then Area

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Important Notes

County

Pollutant

AreaName

Nonattainment in Year

Redesignation
to Maintenance

Classification

Cty NA
Whole/
Part

Population
(2010)

FIPS
State/
Cnty

MONTANA

Cascade Co

Great Falls, MT

07/08/2002

Not Classified

Part

57,573

30/013

Flathead Co

PM-10

Columbia Falls, MT

/ /

Moderate

Part

4,610

30/029

Flathead Co

PM-10

Kalispell, MT

/ /

Moderate

Part

18,422

30/029

Flathead Co

PM-10

Flathead County; Whitefish and vicinity, MT

/ /

Moderate

Part

6,138

30/029

Lake Co

PM-10

Polson, MT

/ /

Moderate

Part

4,099

30/047

Lake Co

PM-10

Ronan, MT

/ /

Moderate

Part

2,734

30/047

Lewis And Clark Co

Lead

East Helena Area (Lewis and Clark Co.), MT

/ /

Part

2,669

30/049

Lewis And Clark Co

SO2

East Helena Area (Lewis and Clark Co.), MT

/ /

Primary, Secondary

Part

2,669

30/049

Lincoln Co

PM-10

Libby, MT

/ /

Moderate

Part

3,378

30/053

Lincoln Co

PM-2.5 1997

Libby, MT

/ /

Part

9,429

30/053

Missoula Co

Missoula, MT

09/17/2007

Moderate <= 12.7ppm

Part

59,733

30/063

Missoula Co

PM-10

Missoula, MT

/ /

Moderate

Part

59,733

30/063

Rosebud Co

PM-10

Lame Deer, MT

/ /

Moderate

Part

527

30/087

Sanders Co

PM-10

Sanders County (part);Thompson Falls and vicinity, MT

/ /

Moderate

Part

1,317

30/089

Silver Bow Co

PM-10

Butte, MT

/ /

Moderate

Part

34,201

30/093

Yellowstone Co

Billings, MT

04/22/2002

Not Classified

Part

104,360

30/111

Yellowstone Co

SO2

Laurel Area (Yellowstone County), MT

/ /

Primary

Part

6,525

30/111

Important Notes

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