Abbeville County, South Carolina air quality history
Daily Air Quality Index summaries from EPA monitors in Abbeville, South Carolina, 1991–2017.
92%
Good days in 2016
39
Median daily AQI, 2016
0
Days above 100 in 2016
311
Days with an AQI in 2016 (of 366)
In 2016, EPA reported a daily Air Quality Index (AQI) for Abbeville, South Carolina on 311 days. 285 of those days (92%) were in the Good range, and the median daily AQI was 39. That median is about the same as the typical monitored county in South Carolina (median 41 across 20 counties), and about the same as the typical monitored U.S. county (41). The main pollutant was ozone on 311 days. Across the years with fuller monitoring, the share of Good days rose: an average of 78% in 1991–1993 versus 95% in 2014–2016.
The most recent year with data for this county is 2017; EPA's files for 2018–2025 contain no row for it, which usually means its monitors stopped reporting.
Years with fewer than 120 monitored days (2017) 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, 2016
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
311
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
2017
9
9
0
0
0
0
0
25
33
33
Ozone
2016
311
285
26
0
0
0
0
39
49
87
Ozone
2015
266
261
5
0
0
0
0
32
44
71
Ozone
2014
188
179
9
0
0
0
0
35
47
74
Ozone
2013
195
190
5
0
0
0
0
33
44
80
Ozone
2012
211
175
35
1
0
0
0
41
58
150
Ozone
2011
243
223
20
0
0
0
0
40
50
87
Ozone
2010
316
252
64
0
0
0
0
41
64
100
Ozone
2009
292
275
17
0
0
0
0
34
47
84
Ozone
2008
228
141
81
5
1
0
0
46
87
161
Ozone
2007
252
115
113
22
2
0
0
51
100
161
Ozone
2006
224
124
85
13
2
0
0
48
87
166
Ozone
2005
216
136
65
14
1
0
0
45
97
154
Ozone
2004
220
159
53
8
0
0
0
42
80
150
Ozone
2003
224
153
60
11
0
0
0
44
93
150
Ozone
2002
235
127
71
29
8
0
0
49
126
192
Ozone
2001
234
124
79
30
1
0
0
50
105
164
Ozone
2000
219
98
89
29
3
0
0
54
105
159
Ozone
1999
238
113
82
37
6
0
0
54
119
187
Ozone
1998
241
108
95
25
13
0
0
54
119
190
Ozone
1997
192
104
68
20
0
0
0
50
101
150
Ozone
1996
206
160
41
5
0
0
0
41
67
136
Ozone
1995
235
144
78
11
2
0
0
44
90
156
Ozone
1994
317
254
56
6
1
0
0
39
67
151
Ozone
1993
339
243
79
17
0
0
0
38
84
147
Ozone
1992
327
266
50
10
1
0
0
36
67
161
Ozone
1991
262
213
48
1
0
0
0
38
64
101
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 South Carolina with a similar median AQI in 2016
