Does your county violate the EPA’s new smog limits?

By Tony Barboza, Priya Krishnakumar

The U.S. Environmental Protection Agency has adopted new rules that tighten limits on ozone, a lung-damaging pollutant in smog, from 75 parts per billion to 70 parts per billion.

This map, based on the EPA’s most recent air quality data, shows 66 counties do not meet existing ozone standards. Though the new rules will not take effect for a few years, 239 counties would violate the standard of 70 ppb if it were in place today.

Select a smog limit

66 reporting counties would not meet the previous EPA standard.

239 reporting counties do not meet the new standard.

479 reporting counties do not meet the new standard.

Ozone concentration (parts per billion)

40 ppb 100+ ppb

70

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Counties in in this map with no displayed data did not meet the EPA’s data completeness requirements from 2012 to 2014, or do not have an ozone monitor.

*Map updated with EPA data from Oct. 1, 2015, and does not include Puerto Rico. Ozone levels included are each county’s annual fourth-highest daily maximum concentration measured over an 8-hour period and averaged over 3 years (2012-2014). Not every county in the U.S. has an ozone monitor.

County State Current reading (ppb) Meets previous standard (75 ppb) Meets new standard (70 ppb)
Humboldt California 44
Fairbanks North Star Alaska 46
San Francisco California 47
Honolulu Hawaii 48
Skagit Washington 48
Franklin New York 49
Columbia Oregon 51
Denali Alaska 53
Santa Cruz California 53
Aroostook Maine 53
Flathead Montana 53
Lewis and Clark Montana 54
Oxford Maine 55
Missoula Montana 55
Colleton South Carolina 55
Edgefield South Carolina 55
Thurston Washington 55
Marin California 56
San Mateo California 56
Rosebud Montana 56
Billings North Dakota 56
Multnomah Oregon 56
Clark Washington 56
Glynn Georgia 57
Washington Maine 57
Carlton Minnesota 57
Burke North Dakota 57
Dunn North Dakota 57
McKenzie North Dakota 57
Washington Oregon 57
Hidalgo Texas 57
Tuscaloosa Alabama 58
Monterey California 58
Napa California 58
Sonoma California 58
Liberty Florida 58
Penobscot Maine 58
Lake Minnesota 58
Lancaster Nebraska 58
Swain North Carolina 58
Mercer North Dakota 58
Lane Oregon 58
Cameron Texas 58
Pierce Washington 58
Gilmer West Virginia 58
Ashland Wisconsin 58
Baker Florida 59
Collier Florida 59
Marion Florida 59
Chatham Georgia 59
Hancock Indiana 59
Ouachita Louisiana 59
Crow Wing Minnesota 59
Mille Lacs Minnesota 59
Saint Louis Minnesota 59
Chatham North Carolina 59
Burleigh North Dakota 59
Oliver North Dakota 59
Deschutes Oregon 59
Berkeley South Carolina 59
Fauquier Virginia 59
Rockbridge Virginia 59
Etowah Alabama 60
Colusa California 60
Jackson Colorado 60
Columbia Florida 60
Holmes Florida 60
Coweta Georgia 60
Huntington Indiana 60
Sagadahoc Maine 60
Lauderdale Mississippi 60
Churchill Nevada 60
Cass North Dakota 60
Charleston South Carolina 60
Chesterfield South Carolina 60
York South Carolina 60
Houston Alabama 61
Lake California 61
Broward Florida 61
Duval Florida 61
Highlands Florida 61
Sumter Georgia 61
Elkhart Indiana 61
Hendricks Indiana 61
Androscoggin Maine 61
Hinds Mississippi 61
Grafton New Hampshire 61
Steuben New York 61
Herkimer New York 61
Orange New York 61
Marion Oregon 61
Abbeville South Carolina 61
Aiken South Carolina 61
Jackson South Dakota 61
Rockingham Virginia 61
Spokane Washington 61
Greenbrier West Virginia 61
Vilas Wisconsin 61
Elmore Alabama 62
Russell Alabama 62
Siskiyou California 62
Alachua Florida 62
Leon Florida 62
Palm Beach Florida 62
Volusia Florida 62
Chattooga Georgia 62
Muscogee Georgia 62
Butte Idaho 62
Rock Island Illinois 62
Bremer Iowa 62
Polk Iowa 62
Story Iowa 62
Bell Kentucky 62
Pike Kentucky 62
Kennebec Maine 62
Becker Minnesota 62
Stearns Minnesota 62
Washington Minnesota 62
Lee Mississippi 62
Yalobusha Mississippi 62
Belknap New Hampshire 62
Cheshire New Hampshire 62
Grant New Mexico 62
Caldwell North Carolina 62
Macon North Carolina 62
Summit Ohio 62
Clackamas Oregon 62
Anderson South Carolina 62
Custer South Dakota 62
Meade South Dakota 62
Chittenden Vermont 62
Giles Virginia 62
Page Virginia 62
Prince Edward Virginia 62
Roanoke Virginia 62
Carbon Wyoming 62
Colbert Alabama 63
Montgomery Alabama 63
Garfield Colorado 63
Brevard Florida 63
Flagler Florida 63
Miami-Dade Florida 63
Delaware Indiana 63
Madison Indiana 63
Linn Iowa 63
Montgomery Iowa 63
Scott Iowa 63
Warren Iowa 63
Perry Kentucky 63
Goodhue Minnesota 63
Wright Minnesota 63
Merrimack New Hampshire 63
Warren New Jersey 63
Sandoval New Mexico 63
Hamilton New York 63
Saratoga New York 63
Avery North Carolina 63
Montgomery North Carolina 63
New Hanover North Carolina 63
Yancey North Carolina 63
Luzerne Pennsylvania 63
Monroe Pennsylvania 63
Pickens South Carolina 63
Brookings South Dakota 63
Claiborne Tennessee 63
Victoria Texas 63
Frederick Virginia 63
Wythe Virginia 63
Tucker West Virginia 63
Eau Claire Wisconsin 63
Taylor Wisconsin 63
Campbell Wyoming 63
Teton Wyoming 63
Uinta Wyoming 63
Newton Arkansas 64
Moffat Colorado 64
Bay Florida 64
Indian River Florida 64
Lee Florida 64
Okaloosa Florida 64
Osceola Florida 64
Seminole Florida 64
Clarke Georgia 64
Columbia Georgia 64
Dawson Georgia 64
Paulding Georgia 64
Jackson Indiana 64
Johnson Indiana 64
Carter Kentucky 64
Morgan Kentucky 64
Simpson Kentucky 64
St. James Louisiana 64
Baltimore (City) Maryland 64
Monroe Missouri 64
Taney Missouri 64
Essex New York 64
Oswego New York 64
Buncombe North Carolina 64
Franklin North Carolina 64
Graham North Carolina 64
Martin North Carolina 64
Portage Ohio 64
Jackson Oregon 64
Umatilla Oregon 64
Somerset Pennsylvania 64
Tioga Pennsylvania 64
Darlington South Carolina 64
Richland South Carolina 64
Bennington Vermont 64
Berkeley West Virginia 64
Forest Wisconsin 64
La Crosse Wisconsin 64
Fremont Wyoming 64
Sublette Wyoming 64
Sweetwater Wyoming 64
DeKalb Alabama 65
Mobile Alabama 65
Morgan Alabama 65
Denver Colorado 65
Lake Florida 65
Manatee Florida 65
Pinellas Florida 65
Richmond Georgia 65
Sangamon Illinois 65
Will Illinois 65
Hamilton Indiana 65
Boone Kentucky 65
Greenup Kentucky 65
St. Charles Louisiana 65
West Baton Rouge Louisiana 65
Chippewa Michigan 65
Lyon Minnesota 65
Olmsted Minnesota 65
Scott Minnesota 65
Lea New Mexico 65
Monroe New York 65
Tompkins New York 65
Cumberland North Carolina 65
Edgecombe North Carolina 65
Lenoir North Carolina 65
Pitt North Carolina 65
Wake North Carolina 65
Greenville South Carolina 65
Brewster Texas 65
Cache Utah 65
Garfield Utah 65
Madison Virginia 65
Suffolk City Virginia 65
King Washington 65
Cabell West Virginia 65
Marathon Wisconsin 65
Baldwin Alabama 66
Polk Arkansas 66
Glenn California 66
Solano California 66
Mesa Colorado 66
Orange Florida 66
Pasco Florida 66
Polk Florida 66
Murray Georgia 66
Adams Illinois 66
Champaign Illinois 66
Effingham Illinois 66
Posey Indiana 66
Vigo Indiana 66
Palo Alto Iowa 66
Van Buren Iowa 66
Pulaski Kentucky 66
Hancock Maine 66
Knox Maine 66
Berkshire Massachusetts 66
Suffolk Massachusetts 66
Hancock Mississippi 66
Callaway Missouri 66
Douglas Nebraska 66
Luna New Mexico 66
Santa Fe New Mexico 66
Albany New York 66
Durham North Carolina 66
Granville North Carolina 66
Person North Carolina 66
Lawrence Ohio 66
Noble Ohio 66
Caddo Oklahoma 66
Cambria Pennsylvania 66
Clearfield Pennsylvania 66
Elk Pennsylvania 66
Franklin Pennsylvania 66
Lackawanna Pennsylvania 66
Lycoming Pennsylvania 66
Perry Pennsylvania 66
Spartanburg South Carolina 66
Williamson Tennessee 66
Nueces Texas 66
Chesterfield Virginia 66
Prince William Virginia 66
Monongalia West Virginia 66
Sauk Wisconsin 66
Waukesha Wisconsin 66
Contra Costa California 67
La Plata Colorado 67
Montezuma Colorado 67
Santa Rosa Florida 67
Sarasota Florida 67
Bibb Georgia 67
Douglas Georgia 67
DuPage Illinois 67
Macoupin Illinois 67
Allen Indiana 67
Morgan Indiana 67
Clinton Iowa 67
Christian Kentucky 67
Fayette Kentucky 67
Jessamine Kentucky 67
Washington Kentucky 67
Ascension Louisiana 67
Orleans Louisiana 67
St. Bernard Louisiana 67
Washington Maryland 67
Middlesex Massachusetts 67
Wexford Michigan 67
Anoka Minnesota 67
Bolivar Mississippi 67
Lyon Nevada 67
Coos New Hampshire 67
Jefferson New York 67
New York New York 67
Onondaga New York 67
Putnam New York 67
Wayne New York 67
Davie North Carolina 67
Haywood North Carolina 67
Johnston North Carolina 67
Rockingham North Carolina 67
Medina Ohio 67
Washington Ohio 67
Adams Pennsylvania 67
Blount Tennessee 67
DeKalb Tennessee 67
Knox Tennessee 67
Loudon Tennessee 67
Sevier Tennessee 67
Wilson Tennessee 67
Orange Texas 67
San Juan Utah 67
Charles Virginia 67
Hampton City Virginia 67
Loudoun Virginia 67
Stafford Virginia 67
Ohio West Virginia 67
Laramie Wyoming 67
Madison Alabama 68
Shelby Alabama 68
Santa Barbara California 68
Shasta California 68
Yolo California 68
Kane Illinois 68
Carroll Indiana 68
Knox Indiana 68
Harrison Iowa 68
Boyd Kentucky 68
Bossier Louisiana 68
Caddo Louisiana 68
Calcasieu Louisiana 68
Lafayette Louisiana 68
Lafourche Louisiana 68
Garrett Maryland 68
Montgomery Maryland 68
Dukes Massachusetts 68
Worcester Massachusetts 68
Missaukee Michigan 68
Tuscola Michigan 68
Andrew Missouri 68
Boone Missouri 68
Greene Missouri 68
Knox Nebraska 68
Rockingham New Hampshire 68
Bernalillo New Mexico 68
San Juan New Mexico 68
Caswell North Carolina 68
Guilford North Carolina 68
Lincoln North Carolina 68
Rowan North Carolina 68
Union North Carolina 68
Mahoning Ohio 68
Wood Ohio 68
Cherokee Oklahoma 68
Ottawa Oklahoma 68
Sequoyah Oklahoma 68
Blair Pennsylvania 68
Centre Pennsylvania 68
Greene Pennsylvania 68
Northampton Pennsylvania 68
Minnehaha South Dakota 68
Sullivan Tennessee 68
Navarro Texas 68
Carbon Utah 68
Hanover Virginia 68
Albany Wyoming 68
Washington Arkansas 69
Litchfield Connecticut 69
Escambia Florida 69
Pike Georgia 69
Ada Idaho 69
Jo Daviess Illinois 69
Macon Illinois 69
McHenry Illinois 69
Peoria Illinois 69
Winnebago Illinois 69
Lake Indiana 69
Shawnee Kansas 69
Trego Kansas 69
Bullitt Kentucky 69
Edmonson Kentucky 69
Trigg Kentucky 69
Iberville Louisiana 69
Jefferson Louisiana 69
St. John the Baptist Louisiana 69
Cumberland Maine 69
Carroll Maryland 69
Barnstable Massachusetts 69
Essex Massachusetts 69
Clinton Michigan 69
DeSoto Mississippi 69
Harrison Mississippi 69
Cass Missouri 69
Hillsborough New Hampshire 69
Atlantic New Jersey 69
Passaic New Jersey 69
Valencia New Mexico 69
Dutchess New York 69
Niagara New York 69
Greene Ohio 69
Knox Ohio 69
Licking Ohio 69
Lorain Ohio 69
Preble Ohio 69
Pittsburg Oklahoma 69
Dauphin Pennsylvania 69
Washington Pennsylvania 69
Westmoreland Pennsylvania 69
York Pennsylvania 69
Hamilton Tennessee 69
Harrison Texas 69
Hunt Texas 69
McLennan Texas 69
Travis Texas 69
Kanawha West Virginia 69
Wood West Virginia 69
Columbia Wisconsin 69
Dane Wisconsin 69
Navajo Arizona 70
Inyo California 70
San Benito California 70
Santa Clara California 70
Windham Connecticut 70
Hillsborough Florida 70
Hamilton Illinois 70
Perry Indiana 70
Shelby Indiana 70
Johnson Kansas 70
Wyandotte Kansas 70
Hancock Kentucky 70
Frederick Maryland 70
Hampden Massachusetts 70
Norfolk Massachusetts 70
Ingham Michigan 70
Cedar Missouri 70
Washoe Nevada 70
Cumberland New Jersey 70
Forsyth North Carolina 70
Fayette Ohio 70
Geauga Ohio 70
Jefferson Ohio 70
Stark Ohio 70
Adair Oklahoma 70
Dewey Oklahoma 70
Mayes Oklahoma 70
McClain Oklahoma 70
Lehigh Pennsylvania 70
Kent Rhode Island 70
Davidson Tennessee 70
Jefferson Texas 70
Kaufman Texas 70
Randall Texas 70
Box Elder Utah 70
Davis Utah 70
Washington Utah 70
Hancock West Virginia 70
Brown Wisconsin 70
Fond du Lac Wisconsin 70
Jefferson Alabama 71
Cochise Arizona 71
Coconino Arizona 71
Pima Arizona 71
Yavapai Arizona 71
Crittenden Arkansas 71
Pulaski Arkansas 71
Calaveras California 71
Arapahoe Colorado 71
El Paso Colorado 71
New Castle Delaware 71
McLean Illinois 71
Boone Indiana 71
Greene Indiana 71
Marion Indiana 71
St. Joseph Indiana 71
Wabash Indiana 71
Warrick Indiana 71
Leavenworth Kansas 71
Jefferson Kentucky 71
Livingston Louisiana 71
Pointe Coupee Louisiana 71
St. Tammany Louisiana 71
Hampshire Massachusetts 71
Huron Michigan 71
Kent Michigan 71
Oakland Michigan 71
Jackson Mississippi 71
Perry Missouri 71
White Pine Nevada 71
Eddy New Mexico 71
Bronx New York 71
Chautauqua New York 71
Erie New York 71
Allen Ohio 71
Clark Ohio 71
Delaware Ohio 71
Lucas Ohio 71
Madison Ohio 71
Miami Ohio 71
Canadian Oklahoma 71
Berks Pennsylvania 71
Erie Pennsylvania 71
Lancaster Pennsylvania 71
Lebanon Pennsylvania 71
Jefferson Tennessee 71
Ellis Texas 71
Gregg Texas 71
Smith Texas 71
Tooele Utah 71
Outagamie Wisconsin 71
La Paz Arizona 72
Alameda California 72
Amador California 72
Kent Delaware 72
DeKalb Georgia 72
Gwinnett Georgia 72
Randolph Illinois 72
Saint Clair Illinois 72
Clark Indiana 72
Vanderburgh Indiana 72
Daviess Kentucky 72
Livingston Kentucky 72
McCracken Kentucky 72
East Baton Rouge Louisiana 72
Baltimore Maryland 72
Bristol Massachusetts 72
Genesee Michigan 72
Schoolcraft Michigan 72
Jasper Missouri 72
Sainte Genevieve Missouri 72
Essex New Jersey 72
Hunterdon New Jersey 72
Monmouth New Jersey 72
Morris New Jersey 72
Queens New York 72
Rockland New York 72
Ashtabula Ohio 72
Montgomery Ohio 72
Trumbull Ohio 72
Warren Ohio 72
Cleveland Oklahoma 72
Creek Oklahoma 72
Lawrence Pennsylvania 72
Montgomery Pennsylvania 72
Sumner Tennessee 72
Bell Texas 72
El Paso Texas 72
Galveston Texas 72
Fairfax Virginia 72
Dodge Wisconsin 72
Walworth Wisconsin 72
Pinal Arizona 73
Tuolumne California 73
Adams Colorado 73
District of Columbia District Of Columbia 73
Porter Indiana 73
Sedgwick Kansas 73
Sumner Kansas 73
York Maine 73
Calvert Maryland 73
Charles Maryland 73
Dorchester Maryland 73
Benzie Michigan 73
Cass Michigan 73
Kalamazoo Michigan 73
Lenawee Michigan 73
Manistee Michigan 73
Washtenaw Michigan 73
Clinton Missouri 73
St. Louis City Missouri 73
Mercer New Jersey 73
Richmond New York 73
Mecklenburg North Carolina 73
Clinton Ohio 73
Comanche Oklahoma 73
Kay Oklahoma 73
Chester Pennsylvania 73
Providence Rhode Island 73
Shelby Tennessee 73
Rockwall Texas 73
Weber Utah 73
Door Wisconsin 73
Kewaunee Wisconsin 73
Gila Arizona 74
Orange California 74
Sutter California 74
Rio Blanco Colorado 74
Weld Colorado 74
Sussex Delaware 74
Jersey Illinois 74
Floyd Indiana 74
Henderson Kentucky 74
Oldham Kentucky 74
Anne Arundel Maryland 74
Kent Maryland 74
Macomb Michigan 74
Mason Michigan 74
St. Clair Michigan 74
Wayne Michigan 74
Clay Missouri 74
Bergen New Jersey 74
Middlesex New Jersey 74
Dona Ana New Mexico 74
Butler Ohio 74
Oklahoma Oklahoma 74
Tulsa Oklahoma 74
Armstrong Pennsylvania 74
Delaware Pennsylvania 74
Indiana Pennsylvania 74
Washington Rhode Island 74
Parker Texas 74
Utah Utah 74
Arlington Virginia 74
Butte California 75
San Luis Obispo California 75
Tehama California 75
Boulder Colorado 75
Campbell Kentucky 75
Harford Maryland 75
Ottawa Michigan 75
Jefferson Missouri 75
Lincoln Missouri 75
Ocean New Jersey 75
Suffolk New York 75
Westchester New York 75
Clermont Ohio 75
Cuyahoga Ohio 75
Franklin Ohio 75
Hamilton Ohio 75
Beaver Pennsylvania 75
Bucks Pennsylvania 75
Mercer Pennsylvania 75
Philadelphia Pennsylvania 75
Salt Lake Utah 75
Manitowoc Wisconsin 75
Fulton Georgia 76
Madison Illinois 76
Prince George's Maryland 76
Camden New Jersey 76
Gloucester New Jersey 76
Harris Texas 76
Hood Texas 76
Johnson Texas 76
Montgomery Texas 76
Uintah Utah 76
Yuma Arizona 77
Hartford Connecticut 77
Henry Georgia 77
Rockdale Georgia 77
Cecil Maryland 77
Saint Louis Missouri 77
Allegheny Pennsylvania 77
Milwaukee Wisconsin 77
Ozaukee Wisconsin 77
Mariposa California 78
Nevada California 78
Larimer Colorado 78
Cook Illinois 78
Saint Charles Missouri 78
Clark Nevada 78
Lake Ohio 78
Collin Texas 78
Dallas Texas 78
Duchesne Utah 78
San Diego California 79
San Joaquin California 79
Ventura California 79
New London Connecticut 79
Lake Illinois 79
LaPorte Indiana 79
Berrien Michigan 79
Muskegon Michigan 79
Maricopa Arizona 80
Imperial California 80
Tolland Connecticut 80
Bexar Texas 80
Brazoria Texas 80
Tarrant Texas 80
Merced California 81
Placer California 81
Douglas Colorado 81
Middlesex Connecticut 81
New Haven Connecticut 81
Denton Texas 81
Kenosha Wisconsin 81
Sheboygan Wisconsin 81
Jefferson Colorado 82
Allegan Michigan 83
El Dorado California 84
Kings California 84
Madera California 84
Stanislaus California 84
Sacramento California 85
Fairfield Connecticut 85
Kern California 91
Tulare California 91
Fresno California 95
Los Angeles California 97
Riverside California 99
San Bernardino California 102

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Sources: Times reporting, Environmental Protection Agency