Daily Air Quality Index summaries from EPA monitors in Morgan, Indiana, 1984–2019.
95%
Good days in 2019
35
Median daily AQI, 2019
0
Days above 100 in 2019
364
Days with an AQI in 2019 (of 365)
In 2019, EPA reported a daily Air Quality Index (AQI) for Morgan, Indiana on 364 days. 344 of those days (95%) were in the Good range, and the median daily AQI was 35. That median is lower than the typical monitored county in Indiana (median 40.5 across 34 counties), and lower than the typical monitored U.S. county (41). The main pollutant was ozone on 364 days. Across the years with fuller monitoring, the share of Good days rose: an average of 51% in 1984–1986 versus 94% in 2017–2019.
The most recent year with data for this county is 2019; EPA's files for 2020–2025 contain no row for it, which usually means its monitors stopped reporting.
Years with fewer than 120 monitored days (1993) 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, 2019
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
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
2019
364
344
20
0
0
0
0
35
48
87
Ozone
2018
364
337
27
0
0
0
0
33
47
100
Ozone
2017
237
228
9
0
0
0
0
36
45
64
Ozone
2016
183
154
28
1
0
0
0
39
61
105
Ozone
2015
181
161
20
0
0
0
0
39
54
80
Ozone
2014
181
147
34
0
0
0
0
43
64
97
Ozone
2013
183
149
34
0
0
0
0
43
58
93
Ozone
2012
182
126
51
5
0
0
0
44
80
133
Ozone
2011
181
119
55
7
0
0
0
45
84
112
Ozone
2010
181
161
20
0
0
0
0
40
51
87
Ozone
2009
179
139
38
2
0
0
0
43
77
140
Ozone
2008
182
114
67
1
0
0
0
47
80
122
Ozone
2007
183
85
69
27
2
0
0
54
112
151
Ozone
2006
183
111
60
12
0
0
0
48
93
129
Ozone
2005
183
95
67
21
0
0
0
50
101
147
Ozone
2004
181
128
48
5
0
0
0
46
74
115
Ozone
2003
183
94
65
22
2
0
0
50
108
156
Ozone
2002
183
79
66
28
10
0
0
58
129
190
Ozone
2001
183
93
65
23
2
0
0
49
105
159
Ozone
2000
181
105
60
11
5
0
0
49
93
169
Ozone
1999
183
81
58
33
11
0
0
58
133
179
Ozone
1998
178
58
80
30
10
0
0
67
129
179
Ozone
1997
177
86
63
22
6
0
0
51
122
164
Ozone
1993
54
54
0
0
0
0
0
22
34
42
NO2
1992
365
320
38
5
2
0
0
26
58
151
NO2
1991
315
233
60
19
3
0
0
32
87
164
Ozone
1990
204
141
41
19
3
0
0
41
101
174
Ozone
1989
203
136
47
19
1
0
0
46
100
154
Ozone
1988
210
107
63
20
17
3
0
50
150
205
Ozone
1987
191
97
56
30
8
0
0
50
115
200
Ozone
1986
191
117
51
18
5
0
0
46
112
169
Ozone
1985
143
80
44
13
6
0
0
48
108
174
Ozone
1984
127
46
45
28
8
0
0
67
136
190
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 Indiana with a similar median AQI in 2019
