Top 101 counties with the lowest Ozone (1-hour) air pollution readings in 2012 (ppm)

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Value distibution for all U.S. cities

Top 101 counties with the lowest Ozone (1-hour) air pollution readings in 2012 (ppm)

RankCityValue
1.
Franklin County, NY (Malone, Harrietstown, Saranac Lake) (pop. 51,134)0.013
2.
Fairbanks North Star Borough, AK (Fairbanks, Badger, College) (pop. 82,840)0.016
3.
Anchorage Municipality, AK (Anchorage) (pop. 260,283)0.017
4.
Warren County, NJ (Phillipsburg, Hackettstown, Washington) (pop. 102,437)0.019
5.
Sonoma County, CA (Santa Rosa, Petaluma, Rohnert Park) (pop. 458,614)0.019
6.
Bronx County, NY (Bronx) (pop. 1,332,650)0.019
7.
Whatcom County, WA (Bellingham, Lynden, Ferndale) (pop. 166,814)0.020
8.
King County, WA (Seattle, East Seattle, Bellevue) (pop. 1,737,034)0.020
9.
San Mateo County, CA (Daly City, San Mateo, Redwood City) (pop. 707,161)0.020
10.
Richland County, SC (Columbia, Dutch Fork, Pontiac) (pop. 320,677)0.020
11.
Alameda County, CA (Oakland, Fremont, Hayward) (pop. 1,443,741)0.021
12.
Ouachita Parish, LA (Monroe, West Monroe, Claiborne) (pop. 147,250)0.021
13.
Multnomah County, OR (Portland, Gresham, Troutdale) (pop. 660,486)0.021
14.
Philadelphia County, PA (Philadelphia) (pop. 1,517,550)0.021
15.
Tuscaloosa County, AL (Tuscaloosa, Northport, Big Sandy-Duncanville) (pop. 164,875)0.022
16.
Skagit County, WA (Mount Vernon, Anacortes, Sedro-Woolley) (pop. 102,979)0.022
17.
Marin County, CA (Ross Valley, San Rafael, Northeast Marin) (pop. 247,289)0.022
18.
Mendocino County, CA (Ukiah, Redwood-Potter, Fort Bragg) (pop. 86,265)0.022
19.
Lane County, OR (Eugene, Springfield, Badger Mountain) (pop. 322,959)0.022
20.
San Francisco County, CA (San Francisco) (pop. 776,733)0.023
21.
Orange County, NY (Newburgh, Middletown, Blooming Grove) (pop. 341,367)0.023
22.
DeKalb County, GA (North Atlanta, Redan, Dunwoody) (pop. 665,865)0.023
23.
Cambria County, PA (Johnstown, Westmont, Northern Cambria) (pop. 152,598)0.023
24.
Santa Cruz County, CA (Santa Cruz, Watsonville, San Lorenzo Valley) (pop. 255,602)0.023
25.
Chatham County, NC (Siler City, Fearrington Village, Pittsboro) (pop. 49,329)0.023
26.
Cheshire County, NH (Keene, Swanzey, Rindge) (pop. 73,825)0.023
27.
New York County, NY (New York, Manhattan) (pop. 1,537,195)0.023
28.
Wayne County, MI (Detroit, Livonia, Dearborn) (pop. 2,061,162)0.024
29.
St. James Parish, LA (Lutcher, South Vacherie, Gramercy) (pop. 21,216)0.024
30.
Perry County, KY (Hazard, Viper, Krypton) (pop. 29,390)0.024
31.
West Baton Rouge Parish, LA (Port Allen, Addis, Erwinville) (pop. 21,601)0.024
32.
Oxford County, ME (Rumford, Paris, Norway) (pop. 54,755)0.024
33.
Ascension Parish, LA (Prairieville, Gonzales, Donaldsonville) (pop. 76,627)0.024
34.
Missoula County, MT (Missoula, Orchard Homes, Seeley Lake-Blackfoot Valley) (pop. 95,802)0.024
35.
Chattooga County, GA (Summerville, Little Sand Mountain, Trion) (pop. 25,470)0.024
36.
DuPage County, IL (Naperville, Wheaton, Downers Grove) (pop. 904,161)0.024
37.
Bergen County, NJ (Hackensack, Teaneck, Fort Lee) (pop. 884,118)0.024
38.
Santa Clara County, CA (San Jose, Sunnyvale, Santa Clara) (pop. 1,682,585)0.024
39.
Holmes County, FL (Bonifay, Ponce de Leon, Esto) (pop. 18,564)0.024
40.
Baker County, FL (Sanderson, Macclenny, Glen St. Mary) (pop. 22,259)0.024
41.
Alachua County, FL (Gainesville, Alachua, High Springs) (pop. 217,955)0.024
42.
Luzerne County, PA (Wilkes-Barre, Back Mountain, Hazleton) (pop. 319,250)0.024
43.
Hidalgo County, TX (McAllen, Southeast Hidalgo, Edinburg) (pop. 569,463)0.024
44.
Blair County, PA (Altoona, Tyrone, Hollidaysburg) (pop. 129,144)0.024
45.
Fergus County, MT (Lewistown, Hanover, Roy) (pop. 11,893)0.024
46.
San Joaquin County, CA (Stockton, Lodi, Tracy) (pop. 563,598)0.024
47.
Columbia County, FL (Lake City, Watertown, North Columbia) (pop. 56,513)0.024
48.
Northampton County, PA (Bethlehem, Easton, Northampton) (pop. 267,066)0.024
49.
Essex County, NJ (Newark, East Orange, Irvington) (pop. 793,633)0.024
50.
Harris County, TX (Houston, Northwest Harris, Pasadena) (pop. 3,400,578)0.024
51.
Putnam County, NY (Carmel, Southeast, Kent) (pop. 95,745)0.024
52.
Suffolk County, MA (Boston, Revere, Chelsea) (pop. 689,807)0.024
53.
Colleton County, SC (Hendersonville, Walterboro, Green Pond) (pop. 38,264)0.024
54.
Marion County, FL (Ocala, East Marion, Fellowship) (pop. 258,916)0.024
55.
Pike County, KY (South Williamson, Pikeville, Millard) (pop. 68,736)0.024
56.
Napa County, CA (Napa, American Canyon, St. Helena) (pop. 124,279)0.024
57.
Swain County, NC (Cherokee, Bryson City) (pop. 12,968)0.025
58.
Lancaster County, PA (Lancaster, Ephrata, Elizabethtown) (pop. 470,658)0.025
59.
Clark County, WA (Vancouver, Hazel Dell, Orchards) (pop. 345,238)0.025
60.
Hudson County, NJ (Jersey City, Union City, Bayonne) (pop. 608,975)0.025
61.
St. Clair County, IL (Belleville, East St. Louis, O'Fallon) (pop. 256,082)0.025
62.
Avery County, NC (Banner Elk, Newland, Elk Park) (pop. 17,167)0.025
63.
Columbia County, OR (St. Helens, Scappoose, Goble) (pop. 43,560)0.025
64.
Flathead County, MT (Kalispell, Creston-Bigfork, Evergreen) (pop. 74,471)0.025
65.
Weber County, UT (Ogden, Roy, North Ogden) (pop. 196,533)0.025
66.
Marion County, OR (Salem, Keizer, Woodburn) (pop. 284,834)0.025
67.
Lycoming County, PA (Williamsport, South Williamsport, Montoursville) (pop. 120,044)0.025
68.
Mobile County, AL (Mobile, Tanner-Williams, Prichard) (pop. 399,843)0.025
69.
St. Charles Parish, LA (Luling, Destrehan, St. Rose) (pop. 48,072)0.025
70.
Shasta County, CA (Redding, Central Shasta, Anderson) (pop. 163,256)0.025
71.
Lawrence County, PA (New Castle, Ellwood City, New Wilmington) (pop. 94,643)0.025
72.
Manatee County, FL (Bradenton, South Bradenton, Myakka) (pop. 264,002)0.025
73.
Berks County, PA (Reading, Wyomissing, Blandon) (pop. 373,638)0.025
74.
Perry County, PA (Marysville, Duncannon, Newport) (pop. 43,602)0.025
75.
Volusia County, FL (Deltona, Daytona Beach, Port Orange) (pop. 443,343)0.025
76.
Broward County, FL (Fort Lauderdale, Hollywood, Pembroke Pines) (pop. 1,623,018)0.025
77.
Montgomery County, PA (Norristown, Pottstown, King of Prussia) (pop. 750,097)0.025
78.
Duval County, FL (Jacksonville, Jacksonville Beach, Atlantic Beach) (pop. 778,879)0.025
79.
Carlton County, MN (Cloquet, Moose Lake, Esko) (pop. 31,671)0.025
80.
Grafton County, NH (Lebanon, Hanover, Littleton) (pop. 81,743)0.025
81.
Bucks County, PA (Levittown, Morrisville, Croydon) (pop. 597,635)0.025
82.
Washington County, MN (Woodbury, Cottage Grove, Oakdale) (pop. 201,130)0.025
83.
Orange County, TX (Orange, Bridge City-Orangefield, Vidor) (pop. 84,966)0.025
84.
Coweta County, GA (Newnan, Senoia, Grantville) (pop. 89,215)0.025
85.
Westmoreland County, PA (Murrysville, Municipality of Murrysville, Greensburg) (pop. 369,993)0.025
86.
Thurston County, WA (Olympia, Lacey, Tumwater) (pop. 207,355)0.025
87.
Webb County, TX (Laredo, Bruni-Mirando, Webb) (pop. 193,117)0.025
88.
Honolulu County, HI (Honolulu, Urban Honolulu, Ewa) (pop. 876,156)0.025
89.
Rockbridge County, VA (Lexington, Buena Vista, East Lexington) (pop. 20,808)0.025
90.
Washington County, PA (Washington, Canonsburg, Donora) (pop. 202,897)0.025
91.
Collier County, FL (Naples, Golden Gate, Immokalee) (pop. 251,377)0.026
92.
Cass County, ND (Fargo, West Fargo, Casselton) (pop. 123,138)0.026
93.
Pasco County, FL (Central Pasco, Bayonet Point, Holiday) (pop. 344,765)0.026
94.
East Baton Rouge Parish, LA (Baton Rouge, Central, Shenandoah) (pop. 412,852)0.026
95.
Los Angeles County, CA (Los Angeles, East San Gabriel Valley, Long Beach) (pop. 9,519,338)0.026
96.
Orange County, FL (Orlando, Southwest Orange, Alafaya) (pop. 896,344)0.026
97.
Queens County, NY (Queens) (pop. 2,229,379)0.026
98.
Monterey County, CA (Salinas, Seaside, Monterey) (pop. 401,762)0.026
99.
Orange County, CA (North Coast, Santa Ana, Anaheim) (pop. 2,846,289)0.026
100.
Lauderdale County, MS (Meridian, Meridian Station, Collinsville) (pop. 78,161)0.026
101.
Mercer County, NJ (Trenton, Ewing, Mercerville-Hamilton Square) (pop. 350,761)0.026
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