Daily Air Quality Index summaries from EPA monitors in Wright, Minnesota, 1987–2025.
73%
Good days in 2025
39
Median daily AQI, 2025
10
Days above 100 in 2025
349
Days with an AQI in 2025 (of 365)
In 2025, EPA reported a daily Air Quality Index (AQI) for Wright, Minnesota on 349 days. 255 of those days (73%) were in the Good range, and the median daily AQI was 39. That median is about the same as the typical monitored county in Minnesota (median 37 across 21 counties), and about the same as the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 192 days. Across the years with fuller monitoring, the share of Good days fell: an average of 100% in 1987–1989 versus 67% in 2023–2025.
Years with fewer than 120 monitored days (1999, 2000) 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)
192
55%
Ozone
157
45%
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
349
255
84
6
4
0
0
39
67
170
PM2.5
2024
366
277
86
3
0
0
0
41
58
110
PM2.5
2023
349
183
145
18
3
0
0
49
87
186
PM2.5
2022
356
278
78
0
0
0
0
41
56
90
Ozone
2021
357
233
119
3
2
0
0
43
71
193
PM2.5
2020
357
289
67
1
0
0
0
37
55
112
PM2.5
2019
362
289
73
0
0
0
0
36
58
90
Ozone
2018
365
271
91
3
0
0
0
42
63
122
PM2.5
2017
365
277
88
0
0
0
0
39
58
100
PM2.5
2016
361
306
53
2
0
0
0
36
54
140
PM2.5
2015
357
301
56
0
0
0
0
37
55
94
PM2.5
2014
353
281
71
1
0
0
0
37
61
112
PM2.5
2013
357
250
107
0
0
0
0
39
61
90
PM2.5
2012
366
246
120
0
0
0
0
43
61
100
PM2.5
2011
365
179
185
1
0
0
0
51
67
105
PM2.5
2010
353
171
178
4
0
0
0
51
68
125
PM2.5
2009
365
206
157
2
0
0
0
46
70
105
PM2.5
2008
356
172
183
1
0
0
0
51
69
106
PM2.5
2007
353
181
161
10
1
0
0
49
70
154
PM2.5
2006
361
197
160
4
0
0
0
48
68
119
PM2.5
2005
363
193
161
7
2
0
0
49
74
161
PM2.5
2004
363
188
170
5
0
0
0
49
74
123
PM2.5
2003
255
118
129
8
0
0
0
52
80
112
PM2.5
2000
45
26
18
1
0
0
0
45
77
117
PM2.5
1999
6
3
3
0
0
0
0
59
86
86
PM2.5
1997
181
180
1
0
0
0
0
19
38
58
NO2
1996
361
356
4
1
0
0
0
19
34
102
NO2
1995
266
266
0
0
0
0
0
21
38
50
NO2
1994
315
314
1
0
0
0
0
20
36
54
NO2
1992
317
316
1
0
0
0
0
16
33
57
NO2
1991
336
335
1
0
0
0
0
18
33
69
NO2
1990
330
329
1
0
0
0
0
18
32
58
NO2
1989
321
318
3
0
0
0
0
19
34
73
NO2
1988
246
245
1
0
0
0
0
19
35
55
NO2
1987
151
151
0
0
0
0
0
18
29
43
NO2
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 Minnesota with a similar median AQI in 2025
