Daily Air Quality Index summaries from EPA monitors in Shawnee, Kansas, 1988–2025.
64%
Good days in 2025
44
Median daily AQI, 2025
5
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 Shawnee, Kansas on 365 days. 234 of those days (64%) were in the Good range, and the median daily AQI was 44. That median is about the same as the typical monitored county in Kansas (median 44 across 11 counties), and higher than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 208 days. Across the years with fuller monitoring, the share of Good days rose: an average of 39% in 1999–2001 versus 62% in 2023–2025.
Years with fewer than 120 monitored days (1993, 1994, 1995, 1996, 1997, 1998…) are shown in the table but left out of comparisons and trend statements.
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)
208
57%
Ozone
153
42%
Coarse particles (PM10)
4
1%
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
234
126
3
1
1
0
44
61
238
PM2.5
2024
366
246
119
1
0
0
0
45
61
125
Ozone
2023
363
196
159
6
2
0
0
48
71
164
PM2.5
2022
350
220
130
0
0
0
0
44
62
87
PM2.5
2021
365
189
173
2
1
0
0
49
65
151
PM2.5
2020
366
227
135
2
2
0
0
44
61
169
PM2.5
2019
365
216
148
0
1
0
0
45
63
161
PM2.5
2018
365
194
171
0
0
0
0
50
67
99
PM2.5
2017
361
242
119
0
0
0
0
43
61
94
PM2.5
2016
366
319
47
0
0
0
0
37
52
87
Ozone
2015
365
312
52
1
0
0
0
37
54
108
Ozone
2014
365
293
71
1
0
0
0
39
58
105
Ozone
2013
364
288
76
0
0
0
0
40
58
93
Ozone
2012
366
242
103
21
0
0
0
44
90
150
Ozone
2011
365
254
102
9
0
0
0
43
71
147
Ozone
2010
365
269
94
2
0
0
0
41
64
140
Ozone
2009
365
296
68
1
0
0
0
37
60
101
Ozone
2008
366
275
91
0
0
0
0
40
61
93
Ozone
2007
362
263
95
4
0
0
0
41
71
112
Ozone
2006
159
100
59
0
0
0
0
40
62
81
PM2.5
2005
121
50
70
1
0
0
0
53
71
112
PM2.5
2004
125
63
61
1
0
0
0
50
67
106
PM2.5
2003
122
52
68
1
1
0
0
53
68
157
PM2.5
2002
122
51
70
1
0
0
0
53
70
110
PM2.5
2001
121
52
69
0
0
0
0
54
70
81
PM2.5
2000
122
52
70
0
0
0
0
54
69
97
PM2.5
1999
121
39
82
0
0
0
0
58
71
96
PM2.5
1998
49
46
3
0
0
0
0
20
46
69
PM10
1997
60
58
2
0
0
0
0
27
42
53
PM10
1996
56
53
3
0
0
0
0
21
38
66
PM10
1995
39
36
3
0
0
0
0
24
49
65
PM10
1994
32
32
0
0
0
0
0
23
42
46
PM10
1993
50
50
0
0
0
0
0
24
38
50
PM10
1992
53
51
2
0
0
0
0
25
44
54
PM10
1991
37
35
2
0
0
0
0
21
36
54
PM10
1990
50
43
7
0
0
0
0
28
53
63
PM10
1989
46
36
10
0
0
0
0
37
54
58
PM10
1988
1
1
0
0
0
0
0
19
19
19
PM10
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 Kansas with a similar median AQI in 2025
