Daily Air Quality Index summaries from EPA monitors in Pike, Kentucky, 1988–2025.
88%
Good days in 2025
34
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 Pike, Kentucky on 365 days. 322 of those days (88%) were in the Good range, and the median daily AQI was 34. That median is lower than the typical monitored county in Kentucky (median 39 across 25 counties), and lower than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 223 days. Across the years with fuller monitoring, the share of Good days rose: an average of 80% in 1992–1994 versus 84% in 2023–2025.
Years with fewer than 120 monitored days (1988, 1989, 1990, 1991) 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)
223
61%
Ozone
142
39%
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
322
43
0
0
0
0
34
52
77
PM2.5
2024
337
285
52
0
0
0
0
38
53
79
PM2.5
2023
364
286
76
2
0
0
0
39
59
127
PM2.5
2022
365
296
69
0
0
0
0
39
53
92
PM2.5
2021
365
273
91
0
1
0
0
41
57
164
PM2.5
2020
365
310
55
0
0
0
0
37
53
93
PM2.5
2019
361
286
75
0
0
0
0
41
55
68
PM2.5
2018
359
272
87
0
0
0
0
41
57
84
PM2.5
2017
364
203
161
0
0
0
0
47
59
77
PM2.5
2016
366
188
175
3
0
0
0
49
61
126
PM2.5
2015
365
153
212
0
0
0
0
52
63
97
PM2.5
2014
365
179
185
1
0
0
0
51
63
104
PM2.5
2013
356
217
137
2
0
0
0
46
57
130
PM2.5
2012
361
206
152
3
0
0
0
47
64
147
PM2.5
2011
363
181
182
0
0
0
0
51
66
98
PM2.5
2010
345
195
148
2
0
0
0
47
66
105
PM2.5
2009
317
198
117
2
0
0
0
44
61
103
PM2.5
2008
353
189
160
4
0
0
0
48
67
115
PM2.5
2007
362
128
211
23
0
0
0
57
90
147
PM2.5
2006
286
193
93
0
0
0
0
43
69
94
Ozone
2005
355
247
105
3
0
0
0
41
71
121
Ozone
2004
360
250
109
1
0
0
0
38
63
103
Ozone
2003
357
262
91
3
1
0
0
38
65
156
Ozone
2002
356
219
118
18
1
0
0
43
79
151
Ozone
2001
355
211
130
14
0
0
0
45
82
136
Ozone
2000
315
175
127
12
1
0
0
46
80
171
Ozone
1999
257
85
138
29
5
0
0
61
112
171
Ozone
1998
234
146
65
20
3
0
0
44
100
172
Ozone
1997
231
197
34
0
0
0
0
38
58
97
Ozone
1996
234
179
45
10
0
0
0
41
77
129
Ozone
1995
230
140
63
21
6
0
0
45
119
200
Ozone
1994
206
162
36
6
2
0
0
43
74
164
Ozone
1993
236
169
60
7
0
0
0
43
77
126
Ozone
1992
240
213
26
1
0
0
0
37
51
115
Ozone
1991
54
49
5
0
0
0
0
29
50
61
PM10
1990
59
56
3
0
0
0
0
25
45
64
PM10
1989
57
46
11
0
0
0
0
37
53
85
PM10
1988
15
15
0
0
0
0
0
20
43
44
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 Kentucky with a similar median AQI in 2025
