Daily Air Quality Index summaries from EPA monitors in Warrick, Indiana, 1987–2025.
87%
Good days in 2025
37
Median daily AQI, 2025
0
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 Warrick, Indiana on 365 days. 319 of those days (87%) were in the Good range, and the median daily AQI was 37. That median is lower than the typical monitored county in Indiana (median 41 across 33 counties), and lower than the typical monitored U.S. county (40). The main pollutant was ozone on 365 days. Across the years with fuller monitoring, the share of Good days rose: an average of 41% in 1987–1989 versus 87% 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
365
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
365
319
46
0
0
0
0
37
54
97
Ozone
2024
366
326
39
1
0
0
0
38
51
101
Ozone
2023
365
311
47
7
0
0
0
38
58
133
Ozone
2022
365
326
38
1
0
0
0
37
51
101
Ozone
2021
365
337
27
1
0
0
0
35
48
105
Ozone
2020
366
347
17
2
0
0
0
33
47
112
Ozone
2019
365
337
28
0
0
0
0
36
50
93
Ozone
2018
365
324
38
3
0
0
0
35
51
126
Ozone
2017
245
212
30
3
0
0
0
42
58
112
Ozone
2016
183
136
42
4
1
0
0
42
71
151
Ozone
2015
183
143
38
2
0
0
0
42
64
115
Ozone
2014
183
140
41
2
0
0
0
44
67
105
Ozone
2013
183
146
37
0
0
0
0
44
61
97
Ozone
2012
183
97
62
22
2
0
0
49
105
159
Ozone
2011
183
127
47
8
1
0
0
46
87
159
Ozone
2010
183
110
67
6
0
0
0
48
93
122
Ozone
2009
183
155
27
1
0
0
0
42
61
101
Ozone
2008
183
124
55
4
0
0
0
45
74
119
Ozone
2007
183
77
73
32
1
0
0
58
112
151
Ozone
2006
183
92
77
12
2
0
0
50
93
154
Ozone
2005
183
75
78
29
1
0
0
58
115
177
Ozone
2004
181
109
64
8
0
0
0
48
84
147
Ozone
2003
183
95
64
21
3
0
0
50
105
190
Ozone
2002
183
82
56
26
18
1
0
58
151
208
Ozone
2001
183
94
67
21
1
0
0
50
105
164
Ozone
2000
183
112
55
16
0
0
0
47
100
136
Ozone
1999
183
76
65
31
11
0
0
61
136
190
Ozone
1998
183
52
78
41
10
2
0
77
140
215
Ozone
1997
183
83
62
25
12
1
0
54
143
204
Ozone
1996
183
73
65
31
14
0
0
64
143
195
Ozone
1995
212
89
70
39
12
2
0
64
140
203
Ozone
1994
199
72
65
40
14
8
0
71
154
223
Ozone
1993
213
126
57
26
4
0
0
46
108
177
Ozone
1992
226
148
59
18
1
0
0
44
100
179
Ozone
1991
227
109
59
41
18
0
0
54
143
200
Ozone
1990
219
129
50
28
12
0
0
46
122
172
Ozone
1989
137
66
41
22
8
0
0
54
129
177
Ozone
1988
182
72
46
29
22
13
0
67
187
221
Ozone
1987
195
67
67
46
15
0
0
74
147
195
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 Indiana with a similar median AQI in 2025
