Daily Air Quality Index summaries from EPA monitors in Lawrence, Alabama, 1992–2025.
83%
Good days in 2017
31
Median daily AQI, 2017
0
Days above 100 in 2017
122
Days with an AQI in 2017 (of 365)
In 2017, EPA reported a daily Air Quality Index (AQI) for Lawrence, Alabama on 122 days. 101 of those days (83%) were in the Good range, and the median daily AQI was 31. That median is lower than the typical monitored county in Alabama (median 40 across 16 counties), and lower than the typical monitored U.S. county (41). The main pollutant was fine particles (PM2.5) on 122 days. Across the years with fuller monitoring, the share of Good days held roughly steady: an average of 63% in 1992–1994 versus 62% in 2006–2017.
EPA did not report an AQI for every day of 2017 here (122 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.
Years with fewer than 120 monitored days (2020, 2021, 2022, 2023, 2024, 2025…) 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, 2017
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)
122
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
97
89
8
0
0
0
0
30
48
61
PM2.5
2024
110
95
15
0
0
0
0
33
54
86
PM2.5
2023
98
81
17
0
0
0
0
34
54
67
PM2.5
2022
102
92
10
0
0
0
0
29
48
58
PM2.5
2021
100
89
11
0
0
0
0
28
53
60
PM2.5
2020
90
84
6
0
0
0
0
24
48
78
PM2.5
2019
112
98
14
0
0
0
0
32
51
58
PM2.5
2018
118
99
19
0
0
0
0
31
54
66
PM2.5
2017
122
101
21
0
0
0
0
31
53
83
PM2.5
2016
118
104
13
1
0
0
0
33
52
105
PM2.5
2015
114
92
22
0
0
0
0
36
55
74
PM2.5
2014
104
75
29
0
0
0
0
36
58
85
PM2.5
2013
109
83
26
0
0
0
0
36
55
66
PM2.5
2012
109
81
28
0
0
0
0
37
55
62
PM2.5
2011
95
52
43
0
0
0
0
46
63
84
PM2.5
2010
112
65
47
0
0
0
0
45
59
64
PM2.5
2009
96
73
23
0
0
0
0
38
55
70
PM2.5
2008
110
60
50
0
0
0
0
47
65
79
PM2.5
2007
282
133
126
22
1
0
0
51
97
156
Ozone
2006
281
157
118
6
0
0
0
48
77
136
Ozone
2005
283
160
117
6
0
0
0
47
80
126
Ozone
2004
278
183
93
2
0
0
0
45
69
101
Ozone
2003
273
160
105
7
1
0
0
47
77
169
Ozone
2002
273
165
95
13
0
0
0
44
84
150
Ozone
2001
274
170
97
7
0
0
0
46
77
119
Ozone
2000
272
122
120
29
1
0
0
54
101
172
Ozone
1999
267
102
117
41
7
0
0
58
119
182
Ozone
1998
245
94
118
30
3
0
0
58
105
177
Ozone
1997
233
129
80
24
0
0
0
47
101
136
Ozone
1996
271
155
100
12
4
0
0
47
87
169
Ozone
1995
333
210
100
22
1
0
0
44
90
190
Ozone
1994
345
230
104
10
1
0
0
42
77
154
Ozone
1993
315
191
113
10
1
0
0
44
82
161
Ozone
1992
188
118
67
3
0
0
0
39
74
118
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.
