Daily report · most polluted

US air quality on 15 October 2026

Oxnard California136 Unhealthy for Sensitive GroupsUS AQI

Oxnard had the most polluted air of 276 US cities

Updated 4:00 pm ET · AirNow

At 4:00 pm ET on 15 October 2026, 276 US cities were reporting. Oxnard had the most polluted air at US AQI 136 (Unhealthy for Sensitive Groups), followed by Hanford (87) and Wilmington (84). The median across all cities was 36, down from 39 the day before. 0 cities were at Unhealthy or worse (0 the day before). Findlay had the cleanest air at 1.

The biggest deterioration was in Oxnard, from 34 to 136. Binghamton improved most, from 52 to 8.

Good 198
Moderate 77
Unhealthy for Sensitive Groups 1

10 most polluted cities

#	City	State	US AQI	Change
1	Oxnard	California	136Sensitive	▲ 102
2	Hanford	California	87Moderate	▼ 16
3	Wilmington	North Carolina	84Moderate	▲ 17
4	Lewiston Orchards	Idaho	79Moderate	▲ 33
5	El Paso	Texas	76Moderate	▲ 9
6	Eureka	California	75Moderate	▲ 18
7	Bakersfield	California	74Moderate	▲ 5
8	Fresno	California	73Moderate	▼ 32
9	Charlotte	North Carolina	71Moderate	▲ 13
10	Louisville	Kentucky	70Moderate	▲ 18

10 cleanest cities

#	City	State	US AQI	Change
1	Findlay	Ohio	1Good	0
2	Butte	Montana	7Good	0
3	Dubuque	Iowa	7Good	▼ 19
4	Sioux City	Iowa	7Good	▼ 9
5	Lubbock	Texas	7Good	▼ 7
6	Lincoln	Nebraska	7Good	▼ 15
7	Quincy	Illinois	8Good	▼ 13
8	Binghamton	New York	8Good	▼ 44
9	Lawrence	Kansas	8Good	▲ 2
10	Burlington	Vermont	8Good	0

Biggest rises

Biggest improvements

All 276 cities on 15 October 2026

#	City	State	US AQI	Change
1	Oxnard	California	136Sensitive	▲ 102
2	Hanford	California	87Moderate	▼ 16
3	Wilmington	North Carolina	84Moderate	▲ 17
4	Lewiston Orchards	Idaho	79Moderate	▲ 33
5	El Paso	Texas	76Moderate	▲ 9
6	Eureka	California	75Moderate	▲ 18
7	Bakersfield	California	74Moderate	▲ 5
8	Fresno	California	73Moderate	▼ 32
9	Charlotte	North Carolina	71Moderate	▲ 13
10	Louisville	Kentucky	70Moderate	▲ 18
11	Chattanooga	Tennessee	70Moderate	▼ 4
12	Pleasure Ridge Park	Kentucky	70Moderate	▲ 18
13	Columbia	South Carolina	68Moderate	▲ 1
14	Aiken	South Carolina	68Moderate	▲ 7
15	Atlanta	Georgia	67Moderate	▲ 1
16	Montgomery	Alabama	67Moderate	▲ 1
17	Augusta	Georgia	66Moderate	▲ 3
18	Gillette	Wyoming	66Moderate	▲ 40
19	San Diego	California	65Moderate	▲ 3
20	Joplin	Missouri	65Moderate	▲ 52
21	Raleigh	North Carolina	64Moderate	▲ 6
22	Columbus	Georgia	63Moderate	▼ 2
23	Huntsville	Alabama	63Moderate	▲ 8
24	Birmingham	Alabama	62Moderate	▲ 7
25	Jackson	Mississippi	62Moderate	▲ 17
26	Hattiesburg	Mississippi	62Moderate	▲ 7
27	Houston	Texas	61Moderate	▲ 8
28	Baton Rouge	Louisiana	61Moderate	▲ 6
29	Fayetteville	North Carolina	61Moderate	▲ 4
30	Prescott Valley	Arizona	61Moderate	▲ 6
31	Indianapolis	Indiana	58Moderate	▲ 9
32	New Orleans	Louisiana	58Moderate	0
33	Nashville	Tennessee	58Moderate	▲ 3
34	Eugene	Oregon	58Moderate	▲ 19
35	Chicago	Illinois	57Moderate	▼ 3
36	Salt Lake City	Utah	57Moderate	▲ 13
37	San Jose	California	57Moderate	▲ 9
38	San Francisco	California	57Moderate	▲ 4
39	Sacramento	California	57Moderate	▲ 16
40	Cincinnati	Ohio	57Moderate	▲ 2
41	Knoxville	Tennessee	57Moderate	▼ 3
42	Chico	California	56Moderate	▲ 27
43	Bend	Oregon	56Moderate	▲ 33
44	Champaign	Illinois	56Moderate	▲ 4
45	Albany	Georgia	56Moderate	▼ 5
46	Little Rock	Arkansas	55Moderate	▲ 3
47	Austin	Texas	55Moderate	▲ 2
48	Spokane	Washington	55Moderate	▲ 20
49	Athens	Georgia	55Moderate	▼ 3
50	College Station	Texas	55Moderate	▲ 23
51	Santa Maria	California	55Moderate	▼ 6
52	Yakima	Washington	55Moderate	▼ 6
53	Conway	Arkansas	55Moderate	▲ 3
54	Columbus	Ohio	54Moderate	▼ 7
55	Los Angeles	California	54Moderate	▲ 4
56	St. Louis	Missouri	54Moderate	▲ 19
57	Richmond	Virginia	54Moderate	▲ 2
58	Provo	Utah	54Moderate	▲ 13
59	San Mateo	California	54Moderate	▲ 3
60	Southaven	Mississippi	54Moderate	▲ 8
61	Monroe	Louisiana	54Moderate	▲ 6
62	Pleasant Grove	Utah	54Moderate	▲ 13
63	Portland	Oregon	53Moderate	▼ 3
64	Seattle	Washington	53Moderate	▲ 19
65	Reno	Nevada	53Moderate	▲ 1
66	Cedar Rapids	Iowa	53Moderate	▲ 22
67	Virginia Beach	Virginia	52Moderate	▼ 4
68	San Antonio	Texas	52Moderate	▲ 9
69	Laredo	Texas	52Moderate	▲ 3
70	Mobile	Alabama	52Moderate	▼ 11
71	Evansville	Indiana	52Moderate	▲ 31
72	Ridgecrest	California	52Moderate	▲ 25
73	Memphis	Tennessee	51Moderate	▼ 2
74	Charleston	South Carolina	51Moderate	▲ 10
75	Peoria	Illinois	51Moderate	▼ 3
76	The Woodlands	Texas	51Moderate	▲ 10
77	Jackson	Tennessee	51Moderate	▲ 40
78	Collierville	Tennessee	51Moderate	▲ 5
79	Davenport	Iowa	50Good	▲ 19
80	Kennewick	Washington	50Good	▲ 10
81	Greenville	South Carolina	50Good	▼ 4
82	Corpus Christi	Texas	49Good	▲ 1
83	Twin Falls	Idaho	49Good	▲ 20
84	Ironville	Kentucky	48Good	▼ 7
85	Gulfport	Mississippi	48Good	▼ 2
86	Dallas	Texas	47Good	▲ 10
87	Cleveland	Ohio	47Good	▲ 14
88	Asheville	North Carolina	47Good	▲ 4
89	Rancho Palos Verdes	California	47Good	▼ 9
90	Myrtle Beach	South Carolina	47Good	▲ 1
91	Jacksonville	Florida	46Good	▲ 1
92	Roanoke	Virginia	46Good	▼ 5
93	Greenville	North Carolina	46Good	▼ 4
94	Bowling Green	Kentucky	46Good	▲ 8
95	Minneapolis	Minnesota	45Good	▲ 21
96	Phoenix	Arizona	45Good	▼ 7
97	Shreveport	Louisiana	45Good	▲ 12
98	Savannah	Georgia	45Good	0
99	El Cajon	California	45Good	▲ 3
100	Tuscaloosa	Alabama	45Good	▼ 2
101	Cleveland	Tennessee	45Good	▼ 22
102	Detroit	Michigan	44Good	▲ 18
103	Anchorage	Alaska	44Good	▼ 8
104	Brownsville	Texas	44Good	▲ 5
105	Port Arthur	Texas	44Good	0
106	Houma	Louisiana	44Good	▼ 14
107	Kingsville	Texas	44Good	▲ 25
108	Tampa	Florida	43Good	0
109	Auburn	Alabama	43Good	▲ 1
110	Bozeman	Montana	43Good	▲ 7
111	Wenatchee	Washington	43Good	▲ 6
112	Tucson	Arizona	42Good	▲ 7
113	Grand Rapids	Michigan	42Good	▲ 8
114	Beaumont	Texas	42Good	▼ 2
115	Victoria	Texas	42Good	▲ 20
116	Palm Springs	California	42Good	▲ 13
117	Carlsbad	New Mexico	42Good	▲ 17
118	Flagstaff	Arizona	41Good	0
119	Sumter	South Carolina	41Good	▲ 7
120	Florence	Alabama	41Good	▲ 5
121	Albuquerque	New Mexico	40Good	▼ 13
122	McAllen	Texas	40Good	▲ 2
123	Rio Rancho	New Mexico	40Good	▼ 13
124	Navarre	Florida	40Good	▼ 10
125	Greensboro	North Carolina	39Good	▼ 11
126	Tallahassee	Florida	39Good	▼ 6
127	Waco	Texas	39Good	▲ 14
128	Lake Charles	Louisiana	39Good	▲ 2
129	Gilbert	Arizona	38Good	0
130	Rockford	Illinois	38Good	▼ 1
131	Springfield	Illinois	38Good	▼ 17
132	Redding	California	38Good	▼ 4
133	Medford	Oregon	38Good	▲ 5
134	Lafayette	Indiana	38Good	▲ 22
135	Hilo	Hawaii	38Good	▼ 17
136	Las Cruces	New Mexico	37Good	▲ 14
137	Santa Fe	New Mexico	37Good	▲ 5
138	Las Vegas	Nevada	36Good	0
139	Orlando	Florida	36Good	▲ 3
140	Clarksville	Tennessee	36Good	▼ 17
141	Dayton	Ohio	36Good	▼ 20
142	Tyler	Texas	36Good	▲ 17
143	Deltona	Florida	36Good	▲ 3
144	Marysville	Washington	36Good	▲ 9
145	Coeur d'Alene	Idaho	36Good	▲ 8
146	Kingman	Arizona	36Good	▲ 34
147	Greenville	Texas	36Good	▲ 17
148	Missoula	Montana	35Good	▲ 12
149	Kingsport	Tennessee	35Good	▼ 11
150	Harrisonburg	Virginia	35Good	▼ 18
151	Panama City	Florida	34Good	new
152	Pullman	Washington	34Good	▲ 12
153	Palm Bay	Florida	33Good	▼ 2
154	Yuma	Arizona	33Good	▲ 2
155	Rapid City	South Dakota	33Good	▲ 12
156	Mentor	Ohio	33Good	▲ 10
157	San Luis	Arizona	33Good	▲ 1
158	Manchester	New Hampshire	32Good	▲ 3
159	Colorado Springs	Colorado	32Good	▲ 19
160	Toledo	Ohio	32Good	▼ 29
161	Fort Wayne	Indiana	32Good	▼ 26
162	Saint George	Utah	32Good	0
163	Concord	New Hampshire	32Good	▲ 31
164	North Kingstown	Rhode Island	32Good	▼ 20
165	Reedley	California	32Good	▲ 5
166	Providence	Rhode Island	31Good	▼ 21
167	Wilmington	Delaware	31Good	▼ 28
168	Denver	Colorado	31Good	▼ 11
169	Joliet	Illinois	31Good	▼ 2
170	Gainesville	Florida	31Good	0
171	Flint	Michigan	31Good	▲ 1
172	Casper	Wyoming	31Good	▲ 17
173	Farmington	New Mexico	31Good	▼ 11
174	Hobbs	New Mexico	31Good	▲ 11
175	Cedar City	Utah	31Good	▲ 9
176	Port Huron	Michigan	31Good	▲ 11
177	Boston	Massachusetts	30Good	▼ 16
178	Boise	Idaho	30Good	▲ 9
179	Tulsa	Oklahoma	30Good	▲ 7
180	Worcester	Massachusetts	30Good	▼ 12
181	Cape Coral	Florida	30Good	▼ 4
182	Lehigh Acres	Florida	30Good	▼ 4
183	Grand Junction	Colorado	30Good	▼ 2
184	Weatherford	Texas	30Good	▲ 11
185	Kansas City	Missouri	29Good	▼ 17
186	Billings	Montana	29Good	▼ 6
187	Rochester	New York	29Good	▲ 4
188	Overland Park	Kansas	29Good	▼ 25
189	Springfield	Missouri	29Good	▲ 15
190	Albany	New York	29Good	▲ 5
191	Fort Smith	Arkansas	29Good	▲ 12
192	Middletown	Connecticut	29Good	▼ 26
193	State College	Pennsylvania	29Good	▼ 9
194	Saratoga Springs	New York	29Good	▲ 7
195	Portland	Maine	28Good	▼ 1
196	Philadelphia	Pennsylvania	28Good	▼ 37
197	Milwaukee	Wisconsin	28Good	▲ 10
198	Washington, D.C.	District of Columbia	28Good	▼ 32
199	Oklahoma City	Oklahoma	28Good	▲ 8
200	Cheyenne	Wyoming	28Good	▲ 15
201	Buffalo	New York	28Good	▲ 10
202	Lansing	Michigan	28Good	▲ 10
203	Saint Cloud	Minnesota	28Good	▲ 6
204	Niagara Falls	New York	28Good	▲ 10
205	Aberdeen	South Dakota	28Good	▲ 17
206	Newark	New Jersey	27Good	▼ 34
207	Salem	Oregon	27Good	▼ 22
208	Syracuse	New York	27Good	▲ 11
209	Allentown	Pennsylvania	27Good	▼ 27
210	Bellingham	Washington	27Good	▼ 16
211	Kahului	Hawaii	27Good	▲ 5
212	Pittsburgh	Pennsylvania	26Good	▼ 31
213	Bismarck	North Dakota	26Good	▼ 24
214	Mankato	Minnesota	26Good	▲ 7
215	Bridgeport	Connecticut	25Good	▼ 31
216	South Bend	Indiana	25Good	▼ 14
217	Altoona	Pennsylvania	25Good	▼ 12
218	New York City	New York	24Good	▼ 37
219	Bangor	Maine	24Good	▲ 3
220	Fairbanks	Alaska	24Good	▼ 8
221	Sioux Falls	South Dakota	23Good	0
222	Fort Lauderdale	Florida	23Good	▼ 15
223	Erie	Pennsylvania	23Good	▲ 8
224	Lorain	Ohio	23Good	▲ 13
225	Pocatello	Idaho	23Good	▼ 20
226	Elmira	New York	23Good	▼ 23
227	Winchester	Virginia	23Good	▼ 23
228	Baltimore	Maryland	22Good	▼ 30
229	Miami	Florida	22Good	▼ 14
230	Columbia	Maryland	22Good	▼ 30
231	Annapolis	Maryland	22Good	▼ 23
232	Appleton	Wisconsin	21Good	▲ 5
233	Cape Girardeau	Missouri	21Good	▼ 8
234	Muskegon	Michigan	21Good	▲ 6
235	Bartlesville	Oklahoma	21Good	▲ 10
236	Laramie	Wyoming	21Good	▲ 14
237	Carbondale	Illinois	21Good	▼ 8
238	Topeka	Kansas	20Good	▼ 26
239	Green Bay	Wisconsin	20Good	▲ 1
240	Fargo	North Dakota	19Good	▼ 1
241	Lexington-Fayette	Kentucky	19Good	▼ 24
242	Madison	Wisconsin	19Good	▲ 1
243	Norman	Oklahoma	19Good	0
244	Duluth	Minnesota	19Good	▼ 4
245	Lynchburg	Virginia	19Good	▼ 14
246	Eau Claire	Wisconsin	19Good	▲ 2
247	Minot	North Dakota	19Good	▼ 5
248	Charleston	West Virginia	18Good	▼ 31
249	Idaho Falls	Idaho	18Good	new
250	Rexburg	Idaho	18Good	new
251	Honolulu	Hawaii	17Good	▼ 12
252	La Crosse	Wisconsin	15Good	▲ 2
253	Grand Island	Nebraska	15Good	▼ 11
254	Jefferson City	Missouri	15Good	▼ 3
255	Redmond	Oregon	15Good	▼ 2
256	Des Moines	Iowa	14Good	▼ 16
257	Rochester	Minnesota	14Good	▼ 4
258	Great Falls	Montana	14Good	▼ 2
259	Parkersburg	West Virginia	14Good	▼ 33
260	Omaha	Nebraska	13Good	▼ 28
261	Columbia	Missouri	13Good	▼ 2
262	Morgantown	West Virginia	13Good	▼ 31
263	Waterloo	Iowa	12Good	▼ 15
264	Pahrump	Nevada	12Good	0
265	Wichita	Kansas	10Good	▼ 28
266	Amarillo	Texas	9Good	▼ 43
267	Burlington	Vermont	8Good	0
268	Lawrence	Kansas	8Good	▲ 2
269	Binghamton	New York	8Good	▼ 44
270	Quincy	Illinois	8Good	▼ 13
271	Lincoln	Nebraska	7Good	▼ 15
272	Lubbock	Texas	7Good	▼ 7
273	Sioux City	Iowa	7Good	▼ 9
274	Dubuque	Iowa	7Good	▼ 19
275	Butte	Montana	7Good	0
276	Findlay	Ohio	1Good	0

Snapshot taken at 4:00 pm ET from US EPA AirNow. Values are the latest hourly readings at that time, not daily averages. Cities with no reading are left out.

Live US AQI ranking →