Daily Air Quality Index summaries from EPA monitors in Washington, Georgia, 1991–2025.
61%
Good days in 2025
46
Median daily AQI, 2025
0
Days above 100 in 2025
364
Days with an AQI in 2025 (of 365)
In 2025, EPA reported a daily Air Quality Index (AQI) for Washington, Georgia on 364 days. 221 of those days (61%) were in the Good range, and the median daily AQI was 46. That median is about the same as the typical monitored county in Georgia (median 46 across 25 counties), and higher than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 364 days. Across the years with fuller monitoring, the share of Good days fell: an average of 69% in 2017–2019 versus 55% in 2023–2025.
Years with fewer than 120 monitored days (2011, 2012, 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)
364
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
364
221
143
0
0
0
0
46
60
82
PM2.5
2024
361
221
139
1
0
0
0
44
62
101
PM2.5
2023
360
160
197
2
1
0
0
52
71
161
PM2.5
2022
362
142
217
3
0
0
0
52
68
112
PM2.5
2021
365
178
184
3
0
0
0
51
69
111
PM2.5
2020
354
230
122
2
0
0
0
43
59
112
PM2.5
2019
211
138
72
1
0
0
0
39
59
116
PM2.5
2018
121
96
25
0
0
0
0
37
56
70
PM2.5
2017
122
77
45
0
0
0
0
43
59
81
PM2.5
2016
119
90
28
1
0
0
0
38
56
105
PM2.5
2015
119
75
44
0
0
0
0
43
57
72
PM2.5
2014
114
54
60
0
0
0
0
52
60
73
PM2.5
2013
110
62
48
0
0
0
0
48
62
82
PM2.5
2012
118
65
53
0
0
0
0
47
63
73
PM2.5
2011
111
51
59
1
0
0
0
51
69
114
PM2.5
2010
112
49
63
0
0
0
0
52
65
91
PM2.5
2009
115
52
62
1
0
0
0
52
66
107
PM2.5
2008
84
40
44
0
0
0
0
52
70
90
PM2.5
2007
60
13
46
1
0
0
0
58
77
110
PM2.5
2006
61
13
47
1
0
0
0
62
78
103
PM2.5
2005
62
18
43
1
0
0
0
59
77
101
PM2.5
2004
60
13
46
0
1
0
0
61
81
151
PM2.5
2003
61
12
49
0
0
0
0
58
73
95
PM2.5
2002
59
11
47
1
0
0
0
57
72
102
PM2.5
2001
64
30
33
0
1
0
0
54
70
171
PM2.5
2000
62
11
51
0
0
0
0
59
81
94
PM2.5
1999
61
11
45
5
0
0
0
62
92
114
PM2.5
1998
60
57
3
0
0
0
0
25
47
78
PM10
1997
56
49
7
0
0
0
0
24
52
54
PM10
1996
53
50
3
0
0
0
0
27
47
61
PM10
1995
59
54
5
0
0
0
0
23
46
62
PM10
1994
52
44
8
0
0
0
0
24
53
63
PM10
1993
53
50
3
0
0
0
0
24
43
60
PM10
1992
59
51
8
0
0
0
0
23
52
63
PM10
1991
41
34
7
0
0
0
0
28
56
66
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 Georgia with a similar median AQI in 2025
