Daily Air Quality Index summaries from EPA monitors in Jasper, Missouri, 1999–2025.
84%
Good days in 2025
38
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 Jasper, Missouri on 365 days. 305 of those days (84%) were in the Good range, and the median daily AQI was 38. That median is lower than the typical monitored county in Missouri (median 41 across 19 counties), and about the same as the typical monitored U.S. county (40). The main pollutant was ozone on 218 days. Across the years with fuller monitoring, the share of Good days rose: an average of 31% in 1999–2001 versus 81% 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
Ozone
218
60%
Coarse particles (PM10)
147
40%
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
305
58
1
1
0
0
38
58
162
Ozone
2024
366
296
70
0
0
0
0
41
61
99
Ozone
2023
365
288
73
4
0
0
0
42
65
119
Ozone
2022
363
283
79
1
0
0
0
41
68
108
Ozone
2021
360
298
62
0
0
0
0
38
58
93
Ozone
2020
366
320
46
0
0
0
0
35
52
82
Ozone
2019
365
324
40
1
0
0
0
37
51
108
Ozone
2018
365
304
61
0
0
0
0
36
54
95
Ozone
2017
365
325
40
0
0
0
0
36
51
74
Ozone
2016
361
319
41
1
0
0
0
34
51
110
Ozone
2015
365
307
58
0
0
0
0
35
56
98
PM10
2014
360
283
76
1
0
0
0
38
61
103
Ozone
2013
362
303
57
2
0
0
0
35
58
105
Ozone
2012
327
221
82
22
2
0
0
41
93
154
Ozone
2011
365
237
107
18
3
0
0
43
90
172
Ozone
2010
365
273
86
6
0
0
0
39
80
140
Ozone
2009
364
301
58
5
0
0
0
36
61
119
Ozone
2008
365
351
14
0
0
0
0
19
40
93
PM10
2007
361
335
25
1
0
0
0
21
45
109
PM10
2006
351
304
45
2
0
0
0
23
54
120
PM10
2005
359
301
57
1
0
0
0
26
59
102
PM10
2004
365
305
60
0
0
0
0
21
58
99
PM10
2003
338
214
121
3
0
0
0
37
67
115
PM10
2002
344
196
127
19
2
0
0
44
82
170
PM10
2001
153
56
88
5
2
1
1
56
88
507
PM2.5
2000
122
30
91
1
0
0
0
57
75
145
PM2.5
1999
121
40
80
1
0
0
0
55
75
106
PM2.5
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 Missouri with a similar median AQI in 2025
