Daily Air Quality Index summaries from EPA monitors in Crittenden, Arkansas, 1989–2025.
81%
Good days in 2025
39
Median daily AQI, 2025
1
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 Crittenden, Arkansas on 365 days. 295 of those days (81%) were in the Good range, and the median daily AQI was 39. That median is lower than the typical monitored county in Arkansas (median 46 across 11 counties), and about the same as the typical monitored U.S. county (40). The main pollutant was ozone on 283 days. Across the years with fuller monitoring, the share of Good days fell: an average of 82% in 1991–1993 versus 79% in 2023–2025.
Years with fewer than 120 monitored days (1989, 1990) 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
283
78%
Fine particles (PM2.5)
77
21%
Nitrogen dioxide (NO₂)
5
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
295
69
1
0
0
0
39
57
112
Ozone
2024
366
294
67
5
0
0
0
41
58
133
Ozone
2023
364
274
85
5
0
0
0
41
64
133
Ozone
2022
365
215
146
3
1
0
0
46
64
156
PM2.5
2021
365
222
139
4
0
0
0
45
63
122
PM2.5
2020
366
244
119
3
0
0
0
45
60
115
PM2.5
2019
365
212
152
1
0
0
0
47
60
101
PM2.5
2018
365
206
156
3
0
0
0
47
61
115
PM2.5
2017
365
199
165
1
0
0
0
48
62
140
PM2.5
2016
366
286
77
2
1
0
0
40
58
159
Ozone
2015
365
283
81
1
0
0
0
37
61
101
Ozone
2014
365
289
76
0
0
0
0
38
58
93
Ozone
2013
365
282
82
1
0
0
0
39
61
104
Ozone
2012
366
244
109
10
3
0
0
44
77
156
Ozone
2011
365
224
124
15
2
0
0
45
77
161
Ozone
2010
365
219
130
14
2
0
0
44
80
164
Ozone
2009
365
278
83
4
0
0
0
39
61
133
Ozone
2008
366
237
123
5
1
0
0
42
71
172
Ozone
2007
365
220
115
27
3
0
0
45
93
177
Ozone
2006
365
217
125
19
4
0
0
45
90
195
Ozone
2005
365
201
132
24
7
1
0
48
97
202
Ozone
2004
366
239
117
10
0
0
0
42
79
140
Ozone
2003
363
236
105
19
2
1
0
43
84
203
Ozone
2002
365
237
99
21
6
2
0
41
90
202
Ozone
2001
365
210
119
27
9
0
0
46
100
192
Ozone
2000
366
223
111
25
7
0
0
44
100
177
Ozone
1999
365
222
98
33
12
0
0
44
112
197
Ozone
1998
356
242
79
32
3
0
0
40
100
166
Ozone
1997
364
260
80
18
6
0
0
40
93
187
Ozone
1996
366
264
69
27
6
0
0
39
100
200
Ozone
1995
365
254
66
37
6
2
0
42
108
219
Ozone
1994
365
274
71
17
3
0
0
37
93
179
Ozone
1993
365
302
55
7
1
0
0
35
67
192
Ozone
1992
361
313
40
7
1
0
0
33
64
197
Ozone
1991
301
229
58
11
2
1
0
38
80
203
Ozone
1990
46
42
4
0
0
0
0
24
50
54
PM10
1989
30
28
2
0
0
0
0
23
44
55
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 Arkansas with a similar median AQI in 2025
