Air Quality by County

AQI data for 977 U.S. counties from EPA AQS (2024). Search by name or sort by air quality. Data from the EPA Air Quality System (AQS) and AirNow, covering all 50 states; see our methodology.

Good · 157,710 d · 74.6%
Moderate · 51,698 d · 24.4%
USG · 1,640 d · 0.8%
Unhealthy · 319 d · 0.2%
Very Unhealthy · 40 d · 0.0%
Hazardous · 43 d · 0.0%

County	State	Good %	Median AQI	Max AQI
Baldwin	Alabama	72.2%	42	87
Clay	Alabama	85.4%	32	133
DeKalb	Alabama	78.6%	42	93
Elmore	Alabama	97.2%	32	64
Etowah	Alabama	63.5%	45	87
Jefferson	Alabama	36.8%	53	112
Lawrence	Alabama	100.0%	23	36
Madison	Alabama	75.1%	42	72
Mobile	Alabama	69.7%	43	80
Montgomery	Alabama	65.4%	44	90
Morgan	Alabama	81.1%	42	71
Russell	Alabama	81.1%	38	88
Shelby	Alabama	95.6%	33	80
Sumter	Alabama	79.3%	41	90
Tuscaloosa	Alabama	76.5%	41	93
Aleutians East	Alaska	95.0%	11	58
Anchorage	Alaska	80.8%	24	110
Denali	Alaska	100.0%	38	49
Fairbanks North Star	Alaska	61.5%	42	190
Juneau	Alaska	85.1%	21	138
Kenai Peninsula	Alaska	100.0%	8	14
Matanuska-Susitna	Alaska	90.3%	7	141
North Slope	Alaska	100.0%	7	27
Apache	Arizona	99.6%	14	52
Cochise	Arizona	65.6%	46	328
Coconino	Arizona	62.5%	48	113
Gila	Arizona	52.0%	50	196
La Paz	Arizona	68.6%	47	253
Maricopa	Arizona	16.4%	71	366
Mohave	Arizona	93.4%	19	331
Navajo	Arizona	99.6%	12	53
Pima	Arizona	37.0%	55	357
Pinal	Arizona	24.6%	66	1215
Santa Cruz	Arizona	63.6%	45	187
Yavapai	Arizona	58.7%	49	97
Yuma	Arizona	53.5%	49	211
Arkansas	Arkansas	51.6%	49	77
Ashley	Arkansas	53.9%	49	68
Clark	Arkansas	97.5%	35	74
Crittenden	Arkansas	79.8%	41	112
Garland	Arkansas	52.8%	49	92
Jackson	Arkansas	65.9%	44	79
Newton	Arkansas	93.0%	38	77
Polk	Arkansas	81.2%	40	119
Pulaski	Arkansas	32.9%	54	239
Union	Arkansas	44.0%	52	70
Washington	Arkansas	83.2%	41	74
Amador	California	84.8%	40	97
Butte	California	66.1%	47	96
Calaveras	California	73.9%	43	100
Colusa	California	84.9%	39	96
Del Norte	California	81.0%	33	70
El Dorado	California	85.8%	39	115
Fresno	California	40.1%	54	157
Glenn	California	80.2%	40	94
Humboldt	California	83.2%	36	75
Imperial	California	27.4%	64	190
Inyo	California	40.7%	54	163
Kern	California	23.8%	61	143
Kings	California	39.8%	53	105
Lake	California	100.0%	17	32
Los Angeles	California	10.9%	77	201
Madera	California	69.2%	43	91
Marin	California	100.0%	21	32
Mariposa	California	81.6%	45	90
Merced	California	64.4%	43	78
Mono	California	92.8%	22	104
Monterey	California	76.9%	40	62
Nevada	California	79.6%	44	84
Orange	California	44.5%	52	159
Placer	California	48.6%	51	143
Plumas	California	52.8%	46	111
Riverside	California	10.6%	87	365
Sacramento	California	58.9%	48	122
San Benito	California	90.6%	41	71
San Bernardino	California	12.4%	90	207
San Diego	California	42.6%	54	161
San Joaquin	California	65.9%	44	93
San Luis Obispo	California	44.0%	51	119
Santa Barbara	California	29.8%	54	186
Santa Cruz	California	81.8%	37	71
Shasta	California	84.9%	44	100
Siskiyou	California	100.0%	6	10
Solano	California	98.9%	34	61
Sonoma	California	100.0%	9	39
Stanislaus	California	68.3%	45	101
Sutter	California	61.3%	48	100
Tehama	California	80.7%	36	90
Trinity	California	68.4%	33	83
Tulare	California	29.7%	59	140
Tuolumne	California	83.3%	40	87
Ventura	California	52.8%	50	131
Yolo	California	60.4%	47	100
Adams	Colorado	50.2%	50	112
Alamosa	Colorado	90.8%	24	76
Arapahoe	Colorado	47.3%	51	101
Archuleta	Colorado	79.5%	32	115
Boulder	Colorado	50.9%	50	119
Clear Creek	Colorado	64.4%	48	100
Delta	Colorado	88.0%	28	103
Denver	Colorado	44.2%	54	115
Douglas	Colorado	57.9%	49	122
El Paso	Colorado	58.2%	49	97
Fremont	Colorado	91.1%	25	77
Garfield	Colorado	76.5%	44	93
Gilpin	Colorado	68.5%	48	101
Gunnison	Colorado	59.9%	49	115
Jackson	Colorado	100.0%	3	8
Jefferson	Colorado	46.5%	51	119
La Plata	Colorado	53.3%	50	112
Larimer	Colorado	40.1%	54	119
Mesa	Colorado	67.4%	47	90
Montezuma	Colorado	72.9%	46	101
Pitkin	Colorado	91.6%	21	154
Prowers	Colorado	91.5%	24	652
Pueblo	Colorado	65.6%	48	101
Routt	Colorado	91.6%	23	87
San Juan	Colorado	100.0%	4	13
San Miguel	Colorado	93.0%	21	94
Weld	Colorado	42.7%	52	119
Fairfield	Connecticut	66.8%	44	166
Hartford	Connecticut	66.8%	44	164
Litchfield	Connecticut	81.8%	41	161
Middlesex	Connecticut	77.9%	42	151
New Haven	Connecticut	68.5%	44	151
New London	Connecticut	79.0%	40	136
Tolland	Connecticut	79.8%	42	136
Windham	Connecticut	90.9%	37	108
Kent	Delaware	70.2%	44	122
New Castle	Delaware	60.4%	46	161
Sussex	Delaware	79.6%	43	105
District of Columbia	District of Columbia	68.1%	45	101
Alachua	Florida	90.1%	37	69
Baker	Florida	69.1%	45	75
Bay	Florida	60.6%	46	92
Brevard	Florida	89.7%	37	80
Broward	Florida	72.4%	43	93
Citrus	Florida	67.8%	44	125
Collier	Florida	67.4%	43	71
Columbia	Florida	56.4%	48	80
Duval	Florida	40.7%	52	136
Escambia	Florida	69.6%	44	104
Flagler	Florida	97.4%	34	77
Hamilton	Florida	54.2%	49	72
Highlands	Florida	93.2%	34	80
Hillsborough	Florida	49.3%	51	122
Holmes	Florida	58.6%	48	79
Indian River	Florida	92.5%	36	77
Lake	Florida	93.3%	35	112
Lee	Florida	74.4%	42	97
Leon	Florida	52.5%	50	140
Liberty	Florida	97.7%	32	77
Manatee	Florida	85.6%	38	97
Marion	Florida	67.3%	46	101
Martin	Florida	76.2%	41	74
Miami-Dade	Florida	51.1%	49	97
Okaloosa	Florida	92.7%	37	84
Orange	Florida	71.5%	44	105
Osceola	Florida	82.4%	41	105
Palm Beach	Florida	71.8%	42	87
Pasco	Florida	91.6%	37	115
Pinellas	Florida	69.3%	44	129
Polk	Florida	94.4%	34	100
Putnam	Florida	96.0%	21	69
Santa Rosa	Florida	66.7%	45	80
Sarasota	Florida	59.7%	47	84
Seminole	Florida	83.5%	40	97
St. Lucie	Florida	95.2%	32	67
Volusia	Florida	78.4%	42	90
Wakulla	Florida	73.6%	43	80
Bibb	Georgia	49.5%	51	119
Charlton	Georgia	79.0%	24	61
Chatham	Georgia	66.7%	44	90
Clarke	Georgia	66.7%	44	89
Clayton	Georgia	53.1%	49	74
Cobb	Georgia	92.5%	36	74
Coffee	Georgia	69.1%	44	78
Dawson	Georgia	94.4%	35	97
DeKalb	Georgia	61.8%	46	90
Dougherty	Georgia	55.6%	46	115
Douglas	Georgia	81.6%	40	97
Floyd	Georgia	72.0%	38	78
Fulton	Georgia	55.8%	49	129
Glynn	Georgia	81.9%	39	94
Gwinnett	Georgia	64.5%	45	84
Hall	Georgia	55.0%	46	82
Henry	Georgia	74.7%	41	74
Houston	Georgia	61.6%	44	93
Lowndes	Georgia	51.9%	49	88
Murray	Georgia	90.7%	39	112
Muscogee	Georgia	59.6%	46	166
Pike	Georgia	88.2%	39	93
Richmond	Georgia	52.8%	49	130
Rockdale	Georgia	93.8%	36	90
Walker	Georgia	55.1%	46	181
Washington	Georgia	57.9%	47	82
Hawaii	Hawaii	81.1%	30	78
Honolulu	Hawaii	95.0%	31	59
Maui	Hawaii	96.1%	22	69
Ada	Idaho	80.6%	39	97
Bannock	Idaho	91.5%	31	111
Benewah	Idaho	74.6%	37	92
Blaine	Idaho	99.4%	22	56
Boise	Idaho	72.9%	43	82
Bonner	Idaho	71.3%	41	74
Bonneville	Idaho	94.9%	19	68
Butte	Idaho	87.4%	44	77
Canyon	Idaho	87.2%	30	65
Custer	Idaho	100.0%	3	13
Franklin	Idaho	95.8%	22	82
Idaho	Idaho	79.8%	39	84
Kootenai	Idaho	88.4%	24	71
Latah	Idaho	99.3%	24	52
Lemhi	Idaho	69.1%	23	85
Nez Perce	Idaho	84.0%	29	89
Shoshone	Idaho	65.7%	37	111
Twin Falls	Idaho	97.2%	24	105
Valley	Idaho	78.1%	32	94
Adams	Illinois	94.4%	38	71
Champaign	Illinois	63.7%	44	138
Clark	Illinois	92.1%	36	87
Cook	Illinois	40.5%	53	168
DuPage	Illinois	61.2%	44	158
Effingham	Illinois	95.7%	35	71
Hamilton	Illinois	66.5%	43	98
Jersey	Illinois	73.3%	44	156
Jo Daviess	Illinois	94.3%	35	87
Kane	Illinois	60.8%	46	165
Lake	Illinois	83.5%	40	108
Macon	Illinois	63.7%	44	141
Macoupin	Illinois	90.8%	37	105
Madison	Illinois	55.3%	48	260
McHenry	Illinois	66.2%	43	165
McLean	Illinois	64.1%	44	154
Peoria	Illinois	57.8%	47	154
Randolph	Illinois	66.9%	44	161
Rock Island	Illinois	67.4%	41	167
Saint Clair	Illinois	64.4%	44	161
Sangamon	Illinois	70.7%	42	142
Will	Illinois	59.3%	45	156
Winnebago	Illinois	67.7%	41	169
Allen	Indiana	58.2%	45	115
Bartholomew	Indiana	69.2%	44	97
Boone	Indiana	86.9%	38	112
Brown	Indiana	94.5%	37	77
Carroll	Indiana	87.8%	37	105
Clark	Indiana	59.7%	46	133
Delaware	Indiana	63.4%	44	108
Dubois	Indiana	67.2%	39	88
Elkhart	Indiana	61.0%	44	132
Floyd	Indiana	63.9%	46	126
Greene	Indiana	74.9%	41	90
Hamilton	Indiana	58.5%	47	118
Hendricks	Indiana	90.1%	38	90
Henry	Indiana	68.8%	38	95
Howard	Indiana	61.5%	46	122
Knox	Indiana	93.1%	38	93
Lake	Indiana	38.8%	53	219
LaPorte	Indiana	62.3%	44	153
Madison	Indiana	71.1%	42	122
Marion	Indiana	43.3%	53	170
Monroe	Indiana	71.8%	36	84
Perry	Indiana	90.4%	38	84
Porter	Indiana	62.4%	44	136
Posey	Indiana	87.8%	39	105
Shelby	Indiana	89.3%	37	105
Spencer	Indiana	64.8%	42	88
St. Joseph	Indiana	63.0%	44	127
Tippecanoe	Indiana	70.7%	39	95
Vanderburgh	Indiana	63.9%	44	100
Vigo	Indiana	62.0%	45	108
Wabash	Indiana	93.9%	37	87
Warrick	Indiana	83.5%	40	97
Whitley	Indiana	65.7%	38	108
Black Hawk	Iowa	56.6%	48	158
Bremer	Iowa	87.1%	38	115
Clinton	Iowa	59.9%	45	166
Harrison	Iowa	83.0%	39	119
Johnson	Iowa	71.0%	36	159
Linn	Iowa	61.2%	44	163
Montgomery	Iowa	68.8%	43	133
Muscatine	Iowa	68.4%	41	141
Palo Alto	Iowa	69.4%	42	134
Polk	Iowa	58.5%	46	136
Pottawattamie	Iowa	71.1%	41	87
Scott	Iowa	59.7%	45	159
Van Buren	Iowa	60.7%	46	129
Webster	Iowa	54.5%	48	165
Woodbury	Iowa	80.8%	39	122
Chase	Kansas	88.9%	22	56
Douglas	Kansas	90.7%	41	101
Ford	Kansas	89.4%	26	115
Johnson	Kansas	71.8%	43	188
Leavenworth	Kansas	93.9%	36	97
Neosho	Kansas	73.5%	43	315
Sedgwick	Kansas	58.6%	48	192
Shawnee	Kansas	64.1%	44	238
Sherman	Kansas	86.6%	25	93
Sumner	Kansas	67.4%	43	370
Trego	Kansas	77.2%	41	91
Wyandotte	Kansas	63.1%	44	240
Bell	Kentucky	63.5%	43	101
Boone	Kentucky	95.1%	38	74
Boyd	Kentucky	82.8%	39	88
Bullitt	Kentucky	92.7%	39	71
Campbell	Kentucky	78.5%	39	77
Carter	Kentucky	89.8%	36	82
Christian	Kentucky	78.3%	41	75
Daviess	Kentucky	70.2%	42	82
Edmonson	Kentucky	93.5%	38	77
Fayette	Kentucky	75.3%	40	76
Greenup	Kentucky	95.1%	37	67
Hancock	Kentucky	82.8%	44	71
Hardin	Kentucky	72.4%	44	73
Jefferson	Kentucky	58.2%	48	129
Jessamine	Kentucky	78.8%	41	72
Livingston	Kentucky	95.3%	40	67
McCracken	Kentucky	81.8%	39	82
Morgan	Kentucky	96.6%	35	77
Oldham	Kentucky	95.1%	39	105
Perry	Kentucky	84.5%	38	172
Pike	Kentucky	86.7%	36	77
Pulaski	Kentucky	84.0%	41	73
Simpson	Kentucky	92.6%	39	74
Warren	Kentucky	81.2%	37	73
Washington	Kentucky	92.4%	38	84
Ascension	Louisiana	94.1%	33	108
Bossier	Louisiana	86.5%	40	101
Caddo	Louisiana	84.3%	38	80
Calcasieu	Louisiana	61.5%	47	108
East Baton Rouge	Louisiana	49.3%	51	115
Iberville	Louisiana	78.4%	41	105
Jefferson	Louisiana	58.6%	48	101
Lafayette	Louisiana	61.5%	47	79
Lafourche	Louisiana	61.9%	46	77
Livingston	Louisiana	62.0%	45	84
Orleans	Louisiana	66.4%	44	71
Ouachita	Louisiana	61.0%	46	71
Pointe Coupee	Louisiana	92.7%	35	93
Rapides	Louisiana	79.0%	35	67
St. Bernard	Louisiana	69.6%	45	93
St. James	Louisiana	92.5%	34	84
St. John the Baptist	Louisiana	91.9%	35	87
St. Martin	Louisiana	91.9%	36	77
St. Tammany	Louisiana	84.9%	38	105
Tangipahoa	Louisiana	82.3%	38	63
Terrebonne	Louisiana	77.0%	39	66
West Baton Rouge	Louisiana	50.5%	50	112
Androscoggin	Maine	85.5%	35	112
Aroostook	Maine	84.1%	36	131
Cumberland	Maine	74.0%	39	136
Hancock	Maine	89.1%	37	133
Kennebec	Maine	83.5%	36	96
Knox	Maine	97.3%	34	77
Oxford	Maine	74.0%	39	135
Penobscot	Maine	86.1%	34	115
Sagadahoc	Maine	95.4%	35	108
Washington	Maine	89.9%	36	100
York	Maine	96.0%	36	169
Anne Arundel	Maryland	87.2%	40	119
Baltimore	Maryland	70.4%	44	129
Baltimore (City)	Maryland	68.7%	44	136
Calvert	Maryland	94.6%	38	77
Carroll	Maryland	90.3%	38	90
Cecil	Maryland	80.9%	41	129
Charles	Maryland	92.4%	38	97
Dorchester	Maryland	84.4%	40	84
Frederick	Maryland	85.7%	41	93
Garrett	Maryland	84.5%	41	80
Harford	Maryland	74.6%	43	143
Howard	Maryland	77.0%	36	78
Kent	Maryland	83.3%	40	129
Montgomery	Maryland	83.5%	41	90
Prince George's	Maryland	83.5%	41	126
Washington	Maryland	77.3%	42	90
Barnstable	Massachusetts	92.5%	38	129
Berkshire	Massachusetts	71.6%	41	124
Bristol	Massachusetts	77.8%	41	119
Dukes	Massachusetts	95.2%	37	151
Essex	Massachusetts	77.0%	42	136
Franklin	Massachusetts	72.8%	40	114
Hampden	Massachusetts	72.2%	41	124
Hampshire	Massachusetts	81.1%	39	117
Middlesex	Massachusetts	76.5%	41	105
Norfolk	Massachusetts	79.4%	43	126
Plymouth	Massachusetts	80.3%	40	108
Suffolk	Massachusetts	72.3%	39	106
Worcester	Massachusetts	75.0%	42	100
Allegan	Michigan	71.2%	43	151
Bay	Michigan	71.8%	38	99
Benzie	Michigan	91.1%	35	80
Berrien	Michigan	80.9%	41	147
Cass	Michigan	85.3%	40	115
Clinton	Michigan	90.2%	39	119
Genesee	Michigan	83.2%	38	126
Huron	Michigan	89.6%	38	108
Ingham	Michigan	82.9%	37	123
Kalamazoo	Michigan	74.0%	40	133
Kent	Michigan	59.9%	46	138
Keweenaw	Michigan	100.0%	7	27
Lenawee	Michigan	77.3%	41	147
Macomb	Michigan	73.9%	41	166
Manistee	Michigan	84.5%	34	152
Marquette	Michigan	87.0%	18	183
Mason	Michigan	89.2%	36	87
Missaukee	Michigan	90.8%	36	92
Muskegon	Michigan	83.5%	39	140
Oakland	Michigan	75.0%	41	166
Ottawa	Michigan	77.8%	40	139
Schoolcraft	Michigan	89.4%	32	115
St. Clair	Michigan	74.3%	39	147
Tuscola	Michigan	90.8%	37	112
Washtenaw	Michigan	76.0%	41	152
Wayne	Michigan	46.4%	52	156
Wexford	Michigan	92.6%	38	93
Anoka	Minnesota	82.1%	38	155
Becker	Minnesota	84.7%	38	133
Beltrami	Minnesota	88.8%	37	108
Blue Earth	Minnesota	82.7%	38	100
Carlton	Minnesota	92.9%	35	93
Cass	Minnesota	94.4%	22	55
Cook	Minnesota	100.0%	12	49
Crow Wing	Minnesota	86.6%	38	105
Dakota	Minnesota	93.4%	9	68
Goodhue	Minnesota	84.3%	41	97
Hennepin	Minnesota	78.0%	39	155
Lake	Minnesota	95.7%	34	129
Lyon	Minnesota	84.5%	37	140
Mille Lacs	Minnesota	91.6%	35	97
Olmsted	Minnesota	83.1%	36	100
Ramsey	Minnesota	76.0%	31	155
Saint Louis	Minnesota	90.6%	38	108
Scott	Minnesota	87.1%	36	84
Stearns	Minnesota	86.0%	36	108
Washington	Minnesota	90.9%	37	84
Winona	Minnesota	94.1%	19	57
Wright	Minnesota	83.4%	39	101
Bolivar	Mississippi	70.3%	44	88
DeSoto	Mississippi	67.0%	44	143
Forrest	Mississippi	62.4%	46	97
Hancock	Mississippi	67.8%	44	84
Harrison	Mississippi	64.5%	45	97
Hinds	Mississippi	43.4%	52	84
Jackson	Mississippi	65.2%	46	93
Lauderdale	Mississippi	94.8%	35	93
Lee	Mississippi	94.8%	38	64
Yalobusha	Mississippi	96.1%	33	80
Andrew	Missouri	84.3%	42	84
Boone	Missouri	89.1%	41	67
Buchanan	Missouri	64.2%	39	256
Callaway	Missouri	85.6%	42	74
Cass	Missouri	82.2%	41	77
Cedar	Missouri	81.8%	40	98
Clay	Missouri	80.1%	42	128
Clinton	Missouri	84.6%	43	74
Greene	Missouri	71.4%	44	160
Jackson	Missouri	60.3%	43	293
Jasper	Missouri	78.4%	42	162
Jefferson	Missouri	79.0%	40	77
Lincoln	Missouri	87.9%	42	90
Monroe	Missouri	89.9%	37	97
Perry	Missouri	95.0%	40	61
Saint Charles	Missouri	81.5%	43	84
Saint Louis	Missouri	88.5%	39	93
Sainte Genevieve	Missouri	93.9%	42	71
St. Louis City	Missouri	47.7%	51	738
Stoddard	Missouri	100.0%	21	43
Taney	Missouri	100.0%	26	41
Beaverhead	Montana	100.0%	12	48
Custer	Montana	91.2%	39	95
Dawson	Montana	95.0%	14	162
Fergus	Montana	92.2%	44	87
Flathead	Montana	82.1%	40	80
Gallatin	Montana	99.1%	14	62
Glacier	Montana	96.4%	22	117
Hill	Montana	94.6%	13	157
Lake	Montana	100.0%	4	9
Lewis and Clark	Montana	65.4%	45	93
Lincoln	Montana	54.5%	45	92
Missoula	Montana	83.4%	38	82
Phillips	Montana	94.2%	18	168
Powell	Montana	100.0%	6	21
Ravalli	Montana	81.6%	19	80
Richland	Montana	86.7%	39	165
Roosevelt	Montana	100.0%	9	38
Rosebud	Montana	100.0%	4	21
Sanders	Montana	100.0%	15	31
Sheridan	Montana	100.0%	13	31
Silver Bow	Montana	82.9%	27	77
Teton	Montana	97.7%	14	89
Yellowstone	Montana	86.7%	39	85
Cass	Nebraska	96.5%	20	64
Douglas	Nebraska	66.8%	44	137
Gage	Nebraska	74.0%	36	131
Hall	Nebraska	80.2%	37	118
Knox	Nebraska	89.3%	39	115
Lancaster	Nebraska	77.7%	36	87
Sarpy	Nebraska	77.1%	33	134
Scotts Bluff	Nebraska	95.2%	24	64
Thomas	Nebraska	94.7%	9	53
Washington	Nebraska	84.3%	29	132
Carson City	Nevada	79.3%	45	80
Churchill	Nevada	81.0%	43	77
Clark	Nevada	25.6%	64	138
Douglas	Nevada	90.9%	22	57
Elko	Nevada	90.8%	19	160
Lyon	Nevada	83.9%	44	84
Nye	Nevada	91.2%	24	128
Washoe	Nevada	50.0%	51	112
White Pine	Nevada	69.9%	47	105
Belknap	New Hampshire	87.9%	34	92
Cheshire	New Hampshire	76.9%	38	115
Coos	New Hampshire	85.4%	40	119
Grafton	New Hampshire	81.3%	38	113
Hillsborough	New Hampshire	82.5%	38	123
Merrimack	New Hampshire	95.9%	38	90
Rockingham	New Hampshire	82.5%	39	115
Atlantic	New Jersey	79.6%	38	105
Bergen	New Jersey	71.1%	40	108
Camden	New Jersey	69.4%	44	168
Cumberland	New Jersey	73.0%	42	123
Gloucester	New Jersey	72.4%	43	143
Hudson	New Jersey	74.7%	41	133
Hunterdon	New Jersey	73.6%	41	122
Mercer	New Jersey	73.6%	43	122
Middlesex	New Jersey	83.2%	36	93
Monmouth	New Jersey	92.4%	37	161
Morris	New Jersey	87.8%	38	115
Ocean	New Jersey	77.7%	40	154
Passaic	New Jersey	76.2%	41	108
Union	New Jersey	62.2%	45	71
Warren	New Jersey	78.5%	38	105
Bernalillo	New Mexico	23.7%	59	228
Catron	New Mexico	100.0%	8	31
Chaves	New Mexico	94.4%	16	53
Dona Ana	New Mexico	19.4%	70	528
Eddy	New Mexico	46.9%	51	143
Lea	New Mexico	61.5%	47	193
Lincoln	New Mexico	89.5%	11	65
Los Alamos	New Mexico	100.0%	10	18
Luna	New Mexico	79.5%	19	321
Rio Arriba	New Mexico	79.9%	45	87
San Juan	New Mexico	58.2%	49	104
Sandoval	New Mexico	64.5%	47	93
Santa Fe	New Mexico	72.5%	46	107
Socorro	New Mexico	100.0%	12	24
Taos	New Mexico	98.5%	14	52
Valencia	New Mexico	66.5%	48	97
Albany	New York	67.4%	39	136
Bronx	New York	56.6%	47	143
Chautauqua	New York	88.6%	39	108
Dutchess	New York	92.7%	37	140
Erie	New York	61.3%	44	140
Essex	New York	79.8%	42	159
Hamilton	New York	96.6%	36	87
Jefferson	New York	94.1%	36	87
Kings	New York	59.3%	44	99
Monroe	New York	71.2%	41	135
Nassau	New York	100.0%	31	31
New York	New York	66.5%	43	136
Niagara	New York	91.6%	37	115
Oneida	New York	80.8%	28	99
Onondaga	New York	79.5%	39	125
Orange	New York	85.4%	28	108
Oswego	New York	97.0%	35	80
Putnam	New York	93.0%	35	97
Queens	New York	65.9%	44	154
Richmond	New York	75.3%	41	129
Rockland	New York	82.8%	39	136
Saratoga	New York	95.9%	36	93
Steuben	New York	80.2%	40	143
Suffolk	New York	74.4%	41	154
Tompkins	New York	91.6%	38	74
Wayne	New York	94.7%	36	150
Westchester	New York	78.8%	41	136
Alexander	North Carolina	92.4%	39	80
Avery	North Carolina	93.9%	38	90
Buncombe	North Carolina	71.4%	42	97
Caldwell	North Carolina	96.2%	37	77
Carteret	North Carolina	94.2%	37	80
Caswell	North Carolina	94.6%	39	77
Catawba	North Carolina	67.2%	43	88
Cumberland	North Carolina	68.9%	44	74
Davidson	North Carolina	50.2%	50	90
Durham	North Carolina	71.1%	43	77
Edgecombe	North Carolina	82.6%	40	68
Forsyth	North Carolina	61.7%	46	90
Graham	North Carolina	88.6%	43	97
Granville	North Carolina	91.5%	40	87
Guilford	North Carolina	74.4%	43	77
Haywood	North Carolina	87.6%	44	87
Hyde	North Carolina	100.0%	20	37
Johnston	North Carolina	76.6%	42	84
Lenoir	North Carolina	96.7%	37	71
Lincoln	North Carolina	87.8%	41	87
Macon	North Carolina	94.7%	34	97
Martin	North Carolina	100.0%	28	50
Mecklenburg	North Carolina	49.2%	51	97
Mitchell	North Carolina	77.0%	35	102
Montgomery	North Carolina	78.6%	41	85
New Hanover	North Carolina	76.6%	41	121
Northampton	North Carolina	74.6%	37	79
Person	North Carolina	94.9%	38	74
Pitt	North Carolina	88.8%	38	71
Rockingham	North Carolina	94.5%	39	74
Rowan	North Carolina	73.3%	44	81
Swain	North Carolina	83.2%	38	87
Union	North Carolina	90.2%	41	90
Wake	North Carolina	66.3%	44	73
Billings	North Dakota	80.3%	40	195
Burke	North Dakota	72.8%	40	285
Burleigh	North Dakota	77.5%	41	218
Cass	North Dakota	73.2%	39	192
Dunn	North Dakota	78.6%	40	217
McKenzie	North Dakota	79.0%	41	197
Mercer	North Dakota	80.3%	39	283
Oliver	North Dakota	79.8%	40	242
Ward	North Dakota	78.2%	38	283
Allen	Ohio	65.9%	43	129
Ashtabula	Ohio	81.2%	43	122
Athens	Ohio	80.3%	33	75
Belmont	Ohio	63.0%	42	123
Butler	Ohio	33.3%	55	151
Clark	Ohio	59.4%	46	126
Clermont	Ohio	72.1%	43	119
Clinton	Ohio	82.1%	42	112
Columbiana	Ohio	100.0%	12	31
Cuyahoga	Ohio	43.6%	53	150
Delaware	Ohio	82.9%	41	119
Franklin	Ohio	39.8%	54	156
Geauga	Ohio	82.9%	42	129
Greene	Ohio	84.1%	41	105
Hamilton	Ohio	32.1%	54	154
Jefferson	Ohio	50.5%	50	101
Knox	Ohio	84.1%	40	159
Lake	Ohio	65.6%	43	133
Lawrence	Ohio	70.3%	43	90
Licking	Ohio	84.6%	41	119
Lorain	Ohio	87.3%	39	119
Lucas	Ohio	41.8%	53	154
Madison	Ohio	77.5%	43	112
Mahoning	Ohio	62.9%	44	122
Medina	Ohio	69.3%	43	126
Miami	Ohio	82.8%	41	101
Montgomery	Ohio	59.7%	47	129
Noble	Ohio	88.7%	39	90
Portage	Ohio	77.5%	43	150
Preble	Ohio	62.0%	45	115
Scioto	Ohio	58.6%	45	238
Stark	Ohio	49.5%	51	124
Summit	Ohio	64.5%	44	126
Trumbull	Ohio	60.5%	46	130
Warren	Ohio	65.4%	44	126
Washington	Ohio	86.7%	41	105
Wood	Ohio	85.3%	39	108
Adair	Oklahoma	59.2%	45	184
Canadian	Oklahoma	78.0%	44	115
Carter	Oklahoma	80.9%	33	155
Cleveland	Oklahoma	53.7%	49	130
Comanche	Oklahoma	63.8%	45	128
Creek	Oklahoma	80.1%	43	97
Dewey	Oklahoma	56.6%	49	164
Grant	Oklahoma	90.0%	29	58
Kay	Oklahoma	68.4%	38	141
Kiowa	Oklahoma	77.1%	44	97
Love	Oklahoma	73.4%	45	169
Mayes	Oklahoma	89.4%	40	87
McClain	Oklahoma	78.1%	43	126
Oklahoma	Oklahoma	48.2%	51	459
Osage	Oklahoma	80.2%	43	105
Ottawa	Oklahoma	53.1%	49	305
Pittsburg	Oklahoma	57.9%	48	140
Sequoyah	Oklahoma	72.0%	42	138
Tulsa	Oklahoma	46.0%	51	508
Washington	Oklahoma	65.6%	44	168
Baker	Oregon	89.0%	25	68
Clackamas	Oregon	93.9%	27	90
Columbia	Oregon	96.7%	25	69
Crook	Oregon	80.7%	24	75
Deschutes	Oregon	93.4%	22	58
Grant	Oregon	66.7%	34	86
Harney	Oregon	70.7%	26	93
Jackson	Oregon	74.0%	42	80
Jefferson	Oregon	86.7%	22	77
Josephine	Oregon	76.2%	31	109
Klamath	Oregon	71.3%	32	83
Lake	Oregon	82.8%	24	105
Lane	Oregon	64.6%	42	117
Linn	Oregon	84.5%	24	89
Marion	Oregon	85.1%	34	85
Multnomah	Oregon	82.4%	38	87
Umatilla	Oregon	79.6%	39	79
Union	Oregon	92.8%	22	70
Wallowa	Oregon	91.2%	23	62
Wasco	Oregon	92.8%	23	65
Washington	Oregon	84.6%	36	88
Adams	Pennsylvania	73.8%	42	100
Allegheny	Pennsylvania	51.6%	49	129
Armstrong	Pennsylvania	68.1%	42	93
Beaver	Pennsylvania	54.3%	47	131
Berks	Pennsylvania	65.6%	44	122
Blair	Pennsylvania	71.9%	41	115
Bradford	Pennsylvania	77.4%	39	87
Bucks	Pennsylvania	87.5%	35	133
Cambria	Pennsylvania	77.7%	37	115
Centre	Pennsylvania	71.5%	43	101
Chester	Pennsylvania	69.0%	44	157
Cumberland	Pennsylvania	67.9%	37	86
Dauphin	Pennsylvania	62.3%	44	93
Delaware	Pennsylvania	65.6%	44	153
Elk	Pennsylvania	94.7%	38	84
Erie	Pennsylvania	81.4%	31	99
Fayette	Pennsylvania	76.9%	41	93
Franklin	Pennsylvania	93.0%	37	77
Greene	Pennsylvania	76.9%	41	105
Indiana	Pennsylvania	67.5%	42	122
Lackawanna	Pennsylvania	79.8%	36	90
Lancaster	Pennsylvania	60.0%	46	119
Lebanon	Pennsylvania	62.3%	44	108
Lehigh	Pennsylvania	70.2%	42	115
Lycoming	Pennsylvania	73.4%	43	105
Mercer	Pennsylvania	77.8%	41	115
Monroe	Pennsylvania	93.3%	35	97
Montgomery	Pennsylvania	71.7%	41	133
Northampton	Pennsylvania	70.8%	39	122
Philadelphia	Pennsylvania	51.6%	50	147
Somerset	Pennsylvania	94.2%	37	93
Susquehanna	Pennsylvania	86.1%	22	58
Tioga	Pennsylvania	78.8%	40	97
Washington	Pennsylvania	71.2%	42	100
Westmoreland	Pennsylvania	73.9%	39	126
Wyoming	Pennsylvania	83.1%	26	79
York	Pennsylvania	65.6%	45	101
Bayamon	Puerto Rico	88.5%	29	102
Caguas	Puerto Rico	94.3%	3	63
Catano	Puerto Rico	64.6%	44	93
Fajardo	Puerto Rico	85.7%	29	65
Guayama	Puerto Rico	100.0%	18	40
Guaynabo	Puerto Rico	86.0%	30	66
Mayagnez	Puerto Rico	96.9%	12	350
Ponce	Puerto Rico	90.9%	5	67
Kent	Rhode Island	90.4%	35	90
Providence	Rhode Island	69.5%	40	196
Washington	Rhode Island	75.7%	42	129
Aiken	South Carolina	89.1%	39	71
Anderson	South Carolina	90.0%	41	84
Berkeley	South Carolina	92.2%	36	84
Charleston	South Carolina	59.0%	47	105
Chesterfield	South Carolina	61.2%	46	103
Darlington	South Carolina	87.3%	42	97
Edgefield	South Carolina	68.1%	44	98
Florence	South Carolina	64.3%	44	99
Greenville	South Carolina	53.9%	48	93
Horry	South Carolina	79.8%	41	170
Richland	South Carolina	57.3%	48	83
Spartanburg	South Carolina	52.4%	49	93
York	South Carolina	76.6%	44	93
Brookings	South Dakota	53.0%	48	154
Brown	South Dakota	87.1%	25	84
Clay	South Dakota	82.6%	37	74
Codington	South Dakota	82.1%	33	154
Custer	South Dakota	72.4%	46	87
Hughes	South Dakota	94.4%	14	88
Jackson	South Dakota	78.5%	44	77
Meade	South Dakota	95.0%	42	71
Minnehaha	South Dakota	82.4%	36	115
Pennington	South Dakota	79.0%	31	107
Anderson	Tennessee	91.0%	42	105
Blount	Tennessee	69.6%	46	101
Claiborne	Tennessee	96.3%	36	100
Davidson	Tennessee	51.8%	50	136
DeKalb	Tennessee	95.4%	35	84
Dyer	Tennessee	79.4%	34	72
Hamilton	Tennessee	64.1%	45	141
Jefferson	Tennessee	88.5%	42	93
Knox	Tennessee	61.2%	46	156
Lawrence	Tennessee	80.8%	34	68
Loudon	Tennessee	81.8%	41	100
Madison	Tennessee	79.6%	33	68
Maury	Tennessee	85.1%	34	74
McMinn	Tennessee	77.5%	37	71
Montgomery	Tennessee	84.7%	31	69
Putnam	Tennessee	88.6%	30	66
Roane	Tennessee	84.1%	29	68
Sevier	Tennessee	94.6%	41	84
Shelby	Tennessee	64.3%	45	90
Sullivan	Tennessee	79.0%	42	90
Sumner	Tennessee	71.2%	44	119
Williamson	Tennessee	88.5%	40	80
Wilson	Tennessee	89.2%	39	77
Atascosa	Texas	58.0%	45	92
Bell	Texas	61.3%	47	140
Bexar	Texas	39.8%	53	122
Bowie	Texas	57.3%	47	107
Brazoria	Texas	84.8%	33	122
Brazos	Texas	63.4%	43	78
Brewster	Texas	69.0%	44	164
Cameron	Texas	31.7%	55	139
Collin	Texas	84.2%	39	151
Culberson	Texas	80.0%	24	75
Dallas	Texas	41.0%	53	304
Denton	Texas	62.3%	47	163
Ector	Texas	64.6%	43	183
El Paso	Texas	12.7%	74	2122
Ellis	Texas	92.9%	33	84
Galveston	Texas	54.3%	48	179
Gregg	Texas	88.9%	36	115
Harris	Texas	8.8%	63	172
Harrison	Texas	62.1%	45	100
Hidalgo	Texas	36.2%	54	140
Hood	Texas	87.8%	37	119
Hunt	Texas	94.7%	33	93
Jefferson	Texas	42.4%	52	93
Johnson	Texas	91.6%	34	101
Karnes	Texas	100.0%	4	32
Kaufman	Texas	63.7%	45	126
Kleberg	Texas	51.7%	49	107
Lubbock	Texas	89.9%	25	167
Maverick	Texas	59.9%	41	90
McLennan	Texas	43.4%	52	142
Montgomery	Texas	30.7%	55	133
Navarro	Texas	58.1%	48	107
Nueces	Texas	35.0%	55	137
Orange	Texas	56.4%	47	71
Parker	Texas	88.5%	36	93
Polk	Texas	94.6%	33	105
Potter	Texas	93.4%	16	85
Randall	Texas	80.8%	42	97
Rockwall	Texas	95.8%	31	108
Smith	Texas	92.2%	35	93
Tarrant	Texas	31.5%	56	162
Travis	Texas	41.0%	53	126
Victoria	Texas	91.6%	31	97
Webb	Texas	51.6%	48	115
Wilson	Texas	100.0%	7	41
Box Elder	Utah	60.0%	48	105
Cache	Utah	61.2%	46	87
Carbon	Utah	62.9%	47	108
Davis	Utah	59.5%	48	119
Duchesne	Utah	59.4%	47	112
Garfield	Utah	100.0%	4	16
Grand	Utah	61.7%	47	93
Iron	Utah	70.0%	46	105
Salt Lake	Utah	37.0%	54	175
San Juan	Utah	65.3%	46	108
Tooele	Utah	70.4%	45	101
Uintah	Utah	58.5%	48	126
Utah	Utah	54.0%	49	109
Wasatch	Utah	58.9%	48	105
Washington	Utah	71.0%	45	97
Wayne	Utah	100.0%	4	19
Weber	Utah	61.3%	47	119
Bennington	Vermont	82.9%	39	93
Chittenden	Vermont	91.2%	40	108
Rutland	Vermont	78.9%	38	92
Windham	Vermont	100.0%	12	46
St John	Virgin Islands	100.0%	18	37
Albemarle	Virginia	77.9%	41	77
Arlington	Virginia	84.8%	40	140
Bristol City	Virginia	78.3%	33	61
Caroline	Virginia	96.2%	37	74
Carroll	Virginia	100.0%	9	19
Charles	Virginia	88.6%	38	101
Chesterfield	Virginia	77.2%	42	80
Fairfax	Virginia	74.8%	44	124
Fauquier	Virginia	97.2%	36	77
Frederick	Virginia	70.4%	42	85
Giles	Virginia	92.4%	39	80
Hampton City	Virginia	80.7%	41	105
Hanover	Virginia	96.3%	37	77
Henrico	Virginia	73.1%	41	85
Hopewell City	Virginia	100.0%	6	15
Loudoun	Virginia	75.8%	43	120
Lynchburg City	Virginia	84.2%	30	69
Madison	Virginia	82.8%	41	87
Norfolk City	Virginia	84.7%	33	94
Prince Edward	Virginia	96.8%	35	67
Prince William	Virginia	94.1%	38	87
Richmond City	Virginia	78.9%	36	77
Roanoke	Virginia	80.7%	39	80
Rockbridge	Virginia	96.5%	35	67
Rockingham	Virginia	76.9%	41	80
Salem City	Virginia	79.6%	30	76
Stafford	Virginia	95.2%	38	77
Suffolk City	Virginia	96.3%	39	101
Virginia Beach City	Virginia	79.1%	34	98
Wythe	Virginia	93.3%	40	77
Adams	Washington	94.7%	19	68
Asotin	Washington	73.8%	35	151
Benton	Washington	88.9%	35	68
Chelan	Washington	87.2%	27	74
Clallam	Washington	88.5%	26	60
Clark	Washington	89.3%	31	80
Columbia	Washington	93.0%	37	68
Cowlitz	Washington	91.6%	21	72
Franklin	Washington	93.7%	22	61
Garfield	Washington	95.9%	18	80
Grant	Washington	89.7%	26	76
Grays Harbor	Washington	97.9%	19	76
Jefferson	Washington	96.5%	19	59
King	Washington	67.5%	43	90
Kitsap	Washington	96.2%	21	58
Kittitas	Washington	84.8%	22	81
Klickitat	Washington	84.2%	14	55
Lewis	Washington	93.3%	18	74
Mason	Washington	92.6%	21	67
Okanogan	Washington	74.8%	31	86
Pacific	Washington	100.0%	15	39
Pierce	Washington	76.1%	44	100
Skagit	Washington	97.1%	22	55
Snohomish	Washington	69.1%	41	87
Spokane	Washington	70.8%	42	71
Stevens	Washington	81.1%	27	119
Thurston	Washington	98.1%	26	52
Walla Walla	Washington	86.0%	25	80
Whatcom	Washington	96.6%	30	58
Whitman	Washington	93.8%	20	97
Yakima	Washington	81.1%	34	87
Berkeley	West Virginia	81.1%	40	77
Brooke	West Virginia	79.3%	35	75
Cabell	West Virginia	74.0%	41	92
Greenbrier	West Virginia	89.3%	42	77
Hancock	West Virginia	74.6%	42	101
Harrison	West Virginia	73.3%	32	68
Kanawha	West Virginia	79.6%	40	69
Marion	West Virginia	72.9%	34	70
Marshall	West Virginia	63.6%	41	81
Monongalia	West Virginia	79.1%	43	105
Ohio	West Virginia	78.5%	42	97
Tucker	West Virginia	94.2%	38	71
Wood	West Virginia	83.5%	39	77
Ashland	Wisconsin	85.6%	39	188
Brown	Wisconsin	79.0%	37	154
Columbia	Wisconsin	84.6%	42	108
Dane	Wisconsin	71.8%	40	136
Dodge	Wisconsin	76.4%	39	137
Door	Wisconsin	85.7%	40	93
Eau Claire	Wisconsin	77.9%	38	159
Fond du Lac	Wisconsin	91.3%	39	80
Forest	Wisconsin	79.7%	41	155
Grant	Wisconsin	72.4%	37	119
Jackson	Wisconsin	76.0%	29	110
Jefferson	Wisconsin	82.6%	41	105
Kenosha	Wisconsin	78.5%	40	128
Kewaunee	Wisconsin	87.0%	41	87
La Crosse	Wisconsin	88.0%	40	90
Manitowoc	Wisconsin	88.0%	37	80
Marathon	Wisconsin	80.0%	36	113
Milwaukee	Wisconsin	69.2%	41	129
Monroe	Wisconsin	75.2%	31	114
Outagamie	Wisconsin	78.5%	38	152
Ozaukee	Wisconsin	80.7%	35	140
Racine	Wisconsin	83.7%	41	122
Rock	Wisconsin	72.8%	42	93
Sauk	Wisconsin	79.6%	34	119
Sheboygan	Wisconsin	83.7%	41	101
Taylor	Wisconsin	93.4%	37	97
Vilas	Wisconsin	87.0%	41	105
Walworth	Wisconsin	75.0%	44	112
Waukesha	Wisconsin	72.4%	41	115
Albany	Wyoming	51.9%	50	144
Campbell	Wyoming	77.3%	43	99
Carbon	Wyoming	100.0%	7	30
Converse	Wyoming	94.5%	41	61
Fremont	Wyoming	61.3%	48	100
Johnson	Wyoming	90.6%	42	84
Laramie	Wyoming	69.8%	47	108
Lincoln	Wyoming	97.8%	10	77
Natrona	Wyoming	85.6%	44	71
Park	Wyoming	99.5%	14	61
Platte	Wyoming	87.7%	14	406
Sheridan	Wyoming	84.6%	33	70
Sublette	Wyoming	68.2%	47	101
Sweetwater	Wyoming	70.3%	45	115
Teton	Wyoming	79.2%	45	84
Uinta	Wyoming	100.0%	10	50
Washakie	Wyoming	98.0%	10	59

Compiled by PlainAirData Editorial, Air Quality Editorial Team