Daily Air Quality Index summaries from EPA monitors in Tulsa, Oklahoma, 1980–2025.
51%
Good days in 2025
50
Median daily AQI, 2025
2
Days above 100 in 2025
365
Days with an AQI in 2025 (of 365)
In 2025, EPA reported a daily Air Quality Index (AQI) for Tulsa, Oklahoma on 365 days. 185 of those days (51%) were in the Good range, and the median daily AQI was 50. That median is higher than the typical monitored county in Oklahoma (median 44 across 19 counties), and higher than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 195 days. Across the years with fuller monitoring, the share of Good days rose: an average of 41% in 1980–1982 versus 46% in 2023–2025.
How the days broke down each year
Each bar is one year. The colored segments show the share of monitored days that fell in each AQI category.
Good
Moderate
Unhealthy for Sensitive Groups
Unhealthy
Very Unhealthy
Hazardous
Typical and high-end AQI over time
The median is the middle day of the year. The 90th percentile is the level that only the highest 10% of days exceeded.
Median daily AQI
90th-percentile daily AQI
Main pollutant by day, 2025
On each monitored day, the AQI reflects whichever measured pollutant had the highest index. This counts how many days each pollutant set the AQI. A pollutant that was not measured here cannot appear.
Pollutant
Days as main pollutant
Share of monitored days
Fine particles (PM2.5)
195
53%
Ozone
162
44%
Coarse particles (PM10)
8
2%
Year-by-year data
Annual AQI summary by year
Year
Days with AQI
Good
Moderate
Unhealthy for Sensitive Groups
Unhealthy
Very Unhealthy
Hazardous
Median AQI
90th pct.
Max AQI
Main pollutant
2025
365
185
178
1
0
0
1
50
74
508
PM2.5
2024
366
177
181
8
0
0
0
51
74
140
Ozone
2023
365
142
205
16
2
0
0
53
77
197
PM2.5
2022
365
163
190
10
2
0
0
52
77
185
PM2.5
2021
365
143
212
8
2
0
0
53
74
168
PM2.5
2020
366
200
164
2
0
0
0
49
62
129
PM2.5
2019
365
188
176
1
0
0
0
50
67
105
PM2.5
2018
365
117
240
7
1
0
0
56
77
192
PM2.5
2017
365
138
226
1
0
0
0
54
70
102
PM2.5
2016
366
158
205
2
1
0
0
52
67
164
PM2.5
2015
365
163
200
2
0
0
0
52
67
147
PM2.5
2014
365
161
202
2
0
0
0
52
71
112
PM2.5
2013
365
131
226
8
0
0
0
55
80
136
PM2.5
2012
366
91
230
39
5
1
0
58
108
201
PM2.5
2011
365
64
256
39
6
0
0
63
108
174
PM2.5
2010
365
84
274
7
0
0
0
59
81
126
PM2.5
2009
365
98
251
15
1
0
0
58
83
172
PM2.5
2008
366
116
239
9
2
0
0
56
77
187
PM2.5
2007
365
95
252
16
2
0
0
57
84
174
PM2.5
2006
365
114
212
33
4
2
0
55
101
207
PM2.5
2005
365
115
207
38
5
0
0
57
101
166
PM2.5
2004
366
141
214
11
0
0
0
54
80
136
PM2.5
2003
365
108
228
22
7
0
0
59
97
172
PM2.5
2002
365
110
217
32
6
0
0
57
101
185
PM2.5
2001
365
75
235
49
5
1
0
63
112
205
PM2.5
2000
366
95
230
32
7
2
0
59
105
219
PM2.5
1999
365
176
153
22
14
0
0
51
100
195
Ozone
1998
365
209
104
43
8
1
0
46
115
213
Ozone
1997
365
236
99
23
7
0
0
44
97
161
Ozone
1996
366
245
86
26
8
1
0
44
100
207
Ozone
1995
365
232
77
36
18
2
0
44
126
210
Ozone
1994
365
221
99
36
8
1
0
45
108
202
Ozone
1993
365
275
72
14
4
0
0
42
84
200
Ozone
1992
366
237
111
17
1
0
0
44
87
156
Ozone
1991
365
210
106
37
11
1
0
46
109
206
Ozone
1990
365
221
98
31
14
1
0
46
108
224
Ozone
1989
365
192
139
29
5
0
0
50
97
192
Ozone
1988
366
182
107
56
19
2
0
51
136
205
Ozone
1987
365
197
102
54
12
0
0
47
126
182
Ozone
1986
365
199
136
20
10
0
0
49
97
177
Ozone
1985
365
227
88
37
13
0
0
46
108
187
Ozone
1984
366
204
106
31
22
3
0
48
133
219
Ozone
1983
365
199
110
34
21
1
0
48
122
206
Ozone
1982
365
189
124
46
5
1
0
50
108
206
Ozone
1981
365
147
163
44
11
0
0
57
106
195
Ozone
1980
366
117
171
50
20
8
0
67
140
245
Ozone
What this data can and can’t tell you
It is a county-level summary. EPA reports one AQI per day for the county, based on the monitors operating there. Air at a particular street, school or home can differ, especially near roads, industry or wildfire smoke.
It is not a health assessment. The AQI is EPA’s scale for communicating daily air quality. A county’s history can’t tell you what the health risk is for any particular person. For daily conditions and health guidance, see AirNow.
Rules change over time. EPA has revised AQI breakpoints, most recently for fine particles in 2024, so some year-to-year change can reflect the scale rather than the air.
Counties in Oklahoma with a similar median AQI in 2025
