Top 101 counties with the lowest Ozone (1-hour) air pollution readings in 2005 (ppm)
1.
Burleigh County, ND
(
Bismarck
,
Lincoln
,
Wing
), pop. 69,416: 0.040
2.
Jackson County, AL
(
Scottsboro
,
Bridgeport
,
Stevenson
), pop. 53,926: 0.043
3.
Coffee County, TN
(
Tullahoma
,
Manchester
,
Hillsboro
), pop. 48,014: 0.053
4.
Marshall County, MS
(
Holly Springs
,
Byhalia
,
Potts Camp
), pop. 34,993: 0.054
5.
Butte County, ID
(
Arco
,
Moore
,
Butte City
), pop. 2,899: 0.054
6.
Honolulu County, HI
(
Honolulu
,
Kailua
,
Kaneohe
), pop. 876,156: 0.055
7.
Yukon-Koyukuk Census Area, AK
, pop. 6,551: 0.056
8.
San Francisco County, CA
(
San Francisco
), pop. 776,733: 0.057
9.
Skagit County, WA
(
Mount Vernon
,
Anacortes
,
Sedro-Woolley
), pop. 102,979: 0.059
10.
Oliver County, ND
(
Center
), pop. 2,065: 0.061
11.
Mercer County, ND
(
Beulah
,
Hazen
,
Stanton
), pop. 8,644: 0.062
12.
Flathead County, MT
(
Kalispell
,
Evergreen
,
Whitefish
), pop. 74,471: 0.063
13.
McKenzie County, ND
(
Watford City
,
Mandaree
,
Alexander
), pop. 5,737: 0.063
14.
Burke County, ND
(
Bowbells
,
Powers Lake
,
Lignite
), pop. 2,242: 0.063
15.
Sonoma County, CA
(
Santa Rosa
,
Petaluma
,
Rohnert Park
), pop. 458,614: 0.063
16.
Whatcom County, WA
(
Bellingham
,
Lynden
,
Ferndale
), pop. 166,814: 0.064
17.
San Mateo County, CA
(
Daly City
,
San Mateo
,
Redwood City
), pop. 707,161: 0.064
18.
Billings County, ND
(
Medora
), pop. 888: 0.065
19.
Lewis County, WA
(
Centralia
,
Chehalis
,
Fords Prairie
), pop. 68,600: 0.066
20.
Mendocino County, CA
(
Ukiah
,
Fort Bragg
,
Willits
), pop. 86,265: 0.066
21.
Lancaster County, NE
(
Lincoln
,
Waverly
,
Hickman
), pop. 250,291: 0.067
22.
Clallam County, WA
(
Port Angeles
,
Sequim
,
Forks
), pop. 64,525: 0.067
23.
Dunn County, ND
(
Killdeer
,
Halliday
,
Dodge
), pop. 3,600: 0.068
24.
Teton County, WY
(
Jackson
,
Hoback
,
Moose Wilson Road
), pop. 18,251: 0.068
25.
Yellowstone County, MT
(
Billings
,
Laurel
,
Lockwood
), pop. 129,352: 0.068
26.
Sumter County, AL
(
Livingston
,
York
,
Cuba
), pop. 14,798: 0.068
27.
Cass County, ND
(
Fargo
,
West Fargo
,
Casselton
), pop. 123,138: 0.069
28.
Monterey County, CA
(
Salinas
,
Seaside
,
Monterey
), pop. 401,762: 0.069
29.
Carson City, NV
, pop. 52,457: 0.069
30.
Thurston County, WA
(
Olympia
,
Lacey
,
Tumwater
), pop. 207,355: 0.070
31.
Santa Cruz County, CA
(
Santa Cruz
,
Watsonville
,
Live Oak
), pop. 255,602: 0.070
32.
Ashland County, WI
(
Ashland
,
Sanborn
,
White River
), pop. 16,866: 0.070
33.
Siskiyou County, CA
(
Yreka
,
Mount Shasta
,
Weed
), pop. 44,301: 0.070
34.
Klickitat County, WA
(
Goldendale
,
White Salmon
,
Dallesport
), pop. 19,161: 0.070
35.
Lake County, CA
(
Clearlake
,
Lakeport
,
Hidden Valley Lake
), pop. 58,309: 0.070
36.
Becker County, MN
(
Detroit Lakes
,
Frazee
,
Lake Park
), pop. 30,000: 0.071
37.
Columbia County, OR
(
St. Helens
,
Scappoose
,
Vernonia
), pop. 43,560: 0.071
38.
Brewster County, TX
(
Alpine
,
Marathon
), pop. 8,866: 0.072
39.
Palo Alto County, IA
(
Emmetsburg
,
Graettinger
,
West Bend
), pop. 10,147: 0.072
40.
Lake County, MN
(
Two Harbors
,
Silver Bay
,
Beaver Bay
), pop. 11,058: 0.073
41.
Stearns County, MN
(
St. Cloud
,
Sartell
,
Waite Park
), pop. 133,166: 0.073
42.
Multnomah County, OR
(
Portland
,
Gresham
,
Troutdale
), pop. 660,486: 0.073
43.
Elmore County, ID
(
Mountain Home
,
Glenns Ferry
,
Atlanta
), pop. 29,130: 0.073
44.
Plumas County, CA
(
East Quincy
,
Chester
,
Portola
), pop. 20,824: 0.074
45.
Campbell County, WY
(
Gillette
,
Wright
,
Sleepy Hollow
), pop. 33,698: 0.074
46.
Oxford County, ME
(
Rumford
,
Paris
,
Norway
), pop. 54,755: 0.075
47.
Penobscot County, ME
(
Bangor
,
Orono
,
Brewer
), pop. 144,919: 0.075
48.
Kootenai County, ID
(
Coeur d'Alene
,
Post Falls
,
Hayden
), pop. 108,685: 0.075
49.
Story County, IA
(
Ames
,
Nevada
,
Story City
), pop. 79,981: 0.075
50.
Talladega County, AL
(
Talladega
,
Sylacauga
,
Childersburg
), pop. 80,321: 0.075
51.
Pennington County, SD
(
Rapid City
,
Rapid Valley
,
Box Elder
), pop. 88,565: 0.075
52.
Jackson County, NC
(
Cullowhee
,
Sylva
,
Webster
), pop. 33,121: 0.075
53.
Marin County, CA
(
San Rafael
,
Novato
,
Mill Valley
), pop. 247,289: 0.075
54.
Carlton County, MN
(
Cloquet
,
Moose Lake
,
Scanlon
), pop. 31,671: 0.076
55.
Cameron County, TX
(
Brownsville
,
Harlingen
,
San Benito
), pop. 335,227: 0.076
56.
Clark County, WA
(
Vancouver
,
Orchards
,
Salmon Creek
), pop. 345,238: 0.076
57.
Montgomery County, IA
(
Red Oak
,
Villisca
,
Stanton
), pop. 11,771: 0.076
58.
Cochise County, AZ
(
Sierra Vista
,
Douglas
,
Bisbee
), pop. 117,755: 0.076
59.
La Plata County, CO
(
Durango
,
Bayfield
,
Ignacio
), pop. 43,941: 0.076
60.
Holmes County, FL
(
Bonifay
,
Ponce de Leon
,
Esto
), pop. 18,564: 0.076
61.
Baker County, FL
(
Macclenny
,
Glen St. Mary
,
Sanderson
), pop. 22,259: 0.076
62.
Minnehaha County, SD
(
Sioux Falls
,
Brandon
,
Dell Rapids
), pop. 148,281: 0.076
63.
Glenn County, CA
(
Orland
,
Willows
,
Hamilton City
), pop. 26,453: 0.076
64.
Wayne County, NY
(
Ontario
,
Newark
,
Sodus
), pop. 93,765: 0.077
65.
Glynn County, GA
(
Brunswick
,
St. Simons
,
Country Club Estates
), pop. 67,568: 0.077
66.
Jackson County, SD
(
Kadoka
,
Wanblee
,
Interior
), pop. 2,930: 0.077
67.
Houston County, AL
(
Dothan
,
Taylor
,
Ashford
), pop. 88,787: 0.078
68.
San Juan County, UT
(
Blanding
,
Monticello
,
Aneth
), pop. 14,413: 0.078
69.
Pike County, KY
(
Pikeville
,
Elkhorn City
,
Phelps
), pop. 68,736: 0.078
70.
Pierce County, WA
(
Tacoma
,
Lakewood
,
Puyallup
), pop. 700,820: 0.078
71.
St. Lucie County, FL
(
Port St. Lucie
,
Fort Pierce
,
Lakewood Park
), pop. 192,695: 0.078
72.
Yavapai County, AZ
(
Prescott
,
Prescott Valley
,
Camp Verde
), pop. 167,517: 0.078
73.
Chemung County, NY
(
Elmira
,
Horseheads
,
Southport
), pop. 91,070: 0.078
74.
Herkimer County, NY
(
Herkimer
,
Ilion
,
Frankfort
), pop. 64,427: 0.078
75.
Newton County, AR
(
Jasper
,
Western Grove
), pop. 8,608: 0.078
76.
Sumter County, GA
(
Americus
,
Plains
,
Leslie
), pop. 33,200: 0.078
77.
Pittsburg County, OK
(
McAlester
,
Longtown
,
Hartshorne
), pop. 43,953: 0.078
78.
Van Buren County, IA
(
Keosauqua
,
Farmington
,
Milton
), pop. 7,809: 0.079
79.
Napa County, CA
(
Napa
,
American Canyon
,
St. Helena
), pop. 124,279: 0.079
80.
Webb County, TX
(
Laredo
,
Rio Bravo
,
El Cenizo
), pop. 193,117: 0.079
81.
Washington County, ME
(
Calais
,
Machias
,
Lubec
), pop. 33,941: 0.079
82.
Hidalgo County, TX
(
McAllen
,
Edinburg
,
Pharr
), pop. 569,463: 0.079
83.
Highlands County, FL
(
Sebring
,
Avon Park
,
Placid Lakes
), pop. 87,366: 0.079
84.
Ohio County, KY
(
Beaver Dam
,
Hartford
,
Fordsville
), pop. 22,916: 0.079
85.
Grant County, NM
(
Silver City
,
Bayard
,
Santa Clara
), pop. 31,002: 0.079
86.
Wakulla County, FL
(
Sopchoppy
,
St. Marks
), pop. 22,863: 0.079
87.
Chittenden County, VT
(
Burlington
,
Colchester
,
South Burlington
), pop. 146,571: 0.079
88.
Palm Beach County, FL
(
West Palm Beach
,
Boca Raton
,
Boynton Beach
), pop. 1,131,184: 0.079
89.
Lyon County, MN
(
Marshall
,
Tracy
,
Minneota
), pop. 25,425: 0.079
90.
Swain County, NC
(
Bryson City
), pop. 12,968: 0.079
91.
Douglas County, NE
(
Omaha
,
Ralston
,
Elkhorn
), pop. 463,585: 0.079
92.
Greenbrier County, WV
(
Lewisburg
,
White Sulphur Springs
,
Fairlea
), pop. 34,453: 0.079
93.
Lee County, FL
(
Cape Coral
,
Fort Myers
,
North Fort Myers
), pop. 440,888: 0.079
94.
Bremer County, IA
(
Waverly
,
Sumner
,
Denver
), pop. 23,325: 0.080
95.
Spokane County, WA
(
Spokane
,
Opportunity
,
Dishman
), pop. 417,939: 0.080
96.
Hinds County, MS
(
Jackson
,
Clinton
,
Byram
), pop. 250,800: 0.080
97.
La Paz County, AZ
(
Quartzsite
,
Parker
,
Salome
), pop. 19,715: 0.080
98.
Effingham County, IL
(
Effingham
,
Altamont
,
Teutopolis
), pop. 34,264: 0.080
99.
Edgefield County, SC
(
Edgefield
,
Johnston
,
Murphys Estates
), pop. 24,595: 0.080
100.
Lawrence County, AL
(
Moulton
,
Town Creek
,
North Courtland
), pop. 34,803: 0.080
101.
Williamsburg County, SC
(
Kingstree
,
Andrews
,
Lane
), pop. 37,217: 0.080
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