Daily Air Quality Index summaries from EPA monitors in Benzie, Michigan, 1991–2025.
91%
Good days in 2025
35
Median daily AQI, 2025
0
Days above 100 in 2025
214
Days with an AQI in 2025 (of 365)
In 2025, EPA reported a daily Air Quality Index (AQI) for Benzie, Michigan on 214 days. 195 of those days (91%) were in the Good range, and the median daily AQI was 35. That median is lower than the typical monitored county in Michigan (median 39 across 26 counties), and lower than the typical monitored U.S. county (40). The main pollutant was ozone on 214 days. Across the years with fuller monitoring, the share of Good days rose: an average of 72% in 1993–1995 versus 87% in 2023–2025.
EPA did not report an AQI for every day of 2025 here (214 of 365 days). Figures describe monitored days only; seasonal monitoring (for example, ozone measured only in warmer months) can make a county look cleaner or dirtier than a full-year record would.
Years with fewer than 120 monitored days (1991, 1992) 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
Ozone
214
100%
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
214
195
19
0
0
0
0
35
50
80
Ozone
2024
245
216
27
2
0
0
0
38
51
101
Ozone
2023
238
198
37
2
1
0
0
38
71
156
Ozone
2022
243
218
22
2
1
0
0
36
51
151
Ozone
2021
251
222
29
0
0
0
0
36
51
100
Ozone
2020
262
244
16
1
1
0
0
36
47
164
Ozone
2019
247
232
15
0
0
0
0
36
46
93
Ozone
2018
250
218
30
1
1
0
0
38
54
154
Ozone
2017
244
216
26
2
0
0
0
39
54
112
Ozone
2016
170
146
18
6
0
0
0
38
61
143
Ozone
2015
183
160
21
2
0
0
0
39
58
108
Ozone
2014
175
150
22
3
0
0
0
39
61
105
Ozone
2013
183
140
42
1
0
0
0
40
71
119
Ozone
2012
182
132
28
22
0
0
0
43
105
147
Ozone
2011
179
154
20
5
0
0
0
39
61
147
Ozone
2010
183
140
38
5
0
0
0
41
67
112
Ozone
2009
183
161
19
3
0
0
0
39
58
140
Ozone
2008
183
145
36
1
1
0
0
42
71
154
Ozone
2007
183
133
35
14
1
0
0
41
97
156
Ozone
2006
180
143
27
8
2
0
0
40
80
197
Ozone
2005
180
125
34
16
5
0
0
43
108
177
Ozone
2004
183
143
35
5
0
0
0
39
84
136
Ozone
2003
183
128
38
11
6
0
0
44
100
182
Ozone
2002
183
118
37
24
3
1
0
44
115
201
Ozone
2001
183
129
28
19
7
0
0
44
122
197
Ozone
2000
183
147
26
9
0
1
0
40
80
203
Ozone
1999
183
126
29
14
14
0
0
43
140
200
Ozone
1998
183
129
37
12
5
0
0
41
90
185
Ozone
1997
183
141
30
9
3
0
0
40
84
182
Ozone
1996
182
139
32
8
2
1
0
42
80
220
Ozone
1995
177
121
33
16
7
0
0
43
112
192
Ozone
1994
183
123
40
18
2
0
0
43
101
172
Ozone
1993
171
140
23
6
2
0
0
42
71
161
Ozone
1992
63
53
6
4
0
0
0
36
74
150
Ozone
1991
99
60
17
11
9
2
0
44
151
238
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 Michigan with a similar median AQI in 2025
