Daily Air Quality Index summaries from EPA monitors in Maury, Tennessee, 1980–2025.
84%
Good days in 2025
33
Median daily AQI, 2025
0
Days above 100 in 2025
358
Days with an AQI in 2025 (of 365)
In 2025, EPA reported a daily Air Quality Index (AQI) for Maury, Tennessee on 358 days. 299 of those days (84%) were in the Good range, and the median daily AQI was 33. That median is lower than the typical monitored county in Tennessee (median 39 across 23 counties), and lower than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 358 days. Across the years with fuller monitoring, the share of Good days held roughly steady: an average of 83% in 1980–1982 versus 81% in 2023–2025.
Years with fewer than 120 monitored days (2006, 2007, 2013, 2014, 2015, 2016…) 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)
358
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
358
299
59
0
0
0
0
33
53
74
PM2.5
2024
360
297
63
0
0
0
0
33
53
83
PM2.5
2023
358
277
81
0
0
0
0
36
58
96
PM2.5
2022
344
282
62
0
0
0
0
33
54
82
PM2.5
2021
349
252
96
1
0
0
0
35
60
109
PM2.5
2020
351
302
49
0
0
0
0
29
53
92
PM2.5
2019
362
301
61
0
0
0
0
31
53
66
PM2.5
2018
331
250
81
0
0
0
0
36
55
70
PM2.5
2017
276
206
70
0
0
0
0
40
55
73
PM2.5
2016
110
89
21
0
0
0
0
36
53
81
PM2.5
2015
98
75
23
0
0
0
0
39
56
66
PM2.5
2014
105
66
39
0
0
0
0
43
62
74
PM2.5
2013
109
75
34
0
0
0
0
41
58
63
PM2.5
2007
112
39
71
2
0
0
0
56
79
103
PM2.5
2006
108
33
75
0
0
0
0
56
72
93
PM2.5
2005
116
33
80
2
1
0
0
57
79
155
PM2.5
2004
115
35
80
0
0
0
0
54
70
92
PM2.5
2003
109
31
78
0
0
0
0
55
70
94
PM2.5
2002
115
39
75
1
0
0
0
53
72
105
PM2.5
2001
111
37
74
0
0
0
0
58
75
97
PM2.5
2000
110
20
87
3
0
0
0
61
80
110
PM2.5
1999
98
16
78
4
0
0
0
60
82
122
PM2.5
1998
61
57
4
0
0
0
0
20
41
67
PM10
1997
63
62
1
0
0
0
0
21
38
55
PM10
1996
63
62
1
0
0
0
0
21
39
54
PM10
1995
64
61
3
0
0
0
0
26
41
55
PM10
1994
235
171
56
7
1
0
0
40
77
154
Ozone
1993
233
150
71
11
1
0
0
43
93
159
Ozone
1992
196
165
25
6
0
0
0
37
61
143
Ozone
1991
361
279
64
17
1
0
0
37
84
156
Ozone
1990
363
250
75
32
6
0
0
42
101
179
Ozone
1989
136
119
17
0
0
0
0
28
54
84
Ozone
1988
59
45
14
0
0
0
0
34
60
72
PM10
1987
62
45
17
0
0
0
0
40
57
84
PM10
1986
64
40
24
0
0
0
0
44
62
97
PM10
1983
65
64
1
0
0
0
0
22
36
64
Ozone
1982
320
249
59
12
0
0
0
34
71
133
Ozone
1981
319
281
29
9
0
0
0
31
58
129
Ozone
1980
220
184
27
7
2
0
0
29
80
174
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 Tennessee with a similar median AQI in 2025
