Daily Air Quality Index summaries from EPA monitors in Fayette, Ohio, 1990–2022.
98%
Good days in 2022
35
Median daily AQI, 2022
0
Days above 100 in 2022
128
Days with an AQI in 2022 (of 365)
In 2022, EPA reported a daily Air Quality Index (AQI) for Fayette, Ohio on 128 days. 126 of those days (98%) were in the Good range, and the median daily AQI was 35. That median is lower than the typical monitored county in Ohio (median 41 across 36 counties), and lower than the typical monitored U.S. county (41). The main pollutant was ozone on 128 days. Across the years with fuller monitoring, the share of Good days rose: an average of 73% in 1990–1992 versus 95% in 2020–2022.
EPA did not report an AQI for every day of 2022 here (128 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.
The most recent year with data for this county is 2022; EPA's files for 2023–2025 contain no row for it, which usually means its monitors stopped reporting.
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, 2022
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
128
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
2022
128
126
2
0
0
0
0
35
46
64
Ozone
2021
360
339
21
0
0
0
0
36
48
90
Ozone
2020
341
318
23
0
0
0
0
35
49
80
Ozone
2019
355
332
23
0
0
0
0
38
48
74
Ozone
2018
364
337
27
0
0
0
0
35
49
80
Ozone
2017
357
326
30
1
0
0
0
35
49
115
Ozone
2016
353
310
42
1
0
0
0
37
54
108
Ozone
2015
327
294
30
3
0
0
0
37
51
115
Ozone
2014
346
314
30
2
0
0
0
37
50
122
Ozone
2013
332
304
26
2
0
0
0
35
49
108
Ozone
2012
350
265
75
9
1
0
0
38
77
200
Ozone
2011
340
280
51
9
0
0
0
37
67
140
Ozone
2010
352
277
70
5
0
0
0
40
67
129
Ozone
2009
356
310
46
0
0
0
0
35
54
100
Ozone
2008
347
284
61
2
0
0
0
37
61
122
Ozone
2007
361
259
80
22
0
0
0
40
90
147
Ozone
2006
356
266
84
6
0
0
0
37
77
140
Ozone
2005
353
261
64
26
2
0
0
38
93
156
Ozone
2004
349
286
55
8
0
0
0
35
64
136
Ozone
2003
348
272
65
9
2
0
0
36
77
177
Ozone
2002
356
261
58
27
10
0
0
36
101
190
Ozone
2001
363
279
66
17
1
0
0
38
80
174
Ozone
2000
358
264
73
17
3
1
0
39
87
201
Ozone
1999
335
205
70
45
15
0
0
45
129
190
Ozone
1998
361
228
75
41
17
0
0
41
112
197
Ozone
1997
361
260
74
23
4
0
0
38
90
172
Ozone
1996
209
134
37
28
9
1
0
44
126
205
Ozone
1995
266
167
64
31
4
0
0
44
108
169
Ozone
1994
357
256
66
29
6
0
0
38
100
185
Ozone
1993
362
259
72
23
8
0
0
37
97
187
Ozone
1992
357
286
56
13
2
0
0
37
77
159
Ozone
1991
349
237
64
34
14
0
0
39
112
192
Ozone
1990
356
255
58
33
10
0
0
39
105
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.
