Air Quality Year-to-Date Report

Updated On: October 19, 2021 9:59 AM
This report displays the daily Ozone Air Quality Index (AQI) for 2021. Each daily value represents the highest monitor for Phoenix. The graph below displays the daily value (blue), the 15-year average (black), and the current EPA standard (orange). All data are preliminary.

Good Days
Moderate Days
Exceedance days
Number of Days
104
136
51

Daily Maximum Ozone Air Quality Index (AQI) [Switch to concentration]

Day
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1
40
43
48
84
87
84
151
108
71
77
2
41
43
58
64
93
80
105
129
74
71
3
43
44
44
84
67
64
90
147
133
67
4
42
49
49
93
93
84
108
140
136
58
5
44
47
48
71
105
67
67
140
122
41
6
42
45
61
58
126
51
97
108
100
47
7
40
50
67
80
100
67
97
80
100
44
8
40
50
61
67
74
64
129
61
97
46
9
43
47
49
80
74
101
101
67
87
47
10
44
44
48
74
74
97
80
61
80
61
11
41
50
46
87
100
151
100
51
93
50
12
41
49
46
50
112
136
84
67
77
43
13
40
44
44
54
105
100
108
93
90
45
14
40
42
50
51
90
84
101
93
100
49
15
42
41
48
90
58
203
97
84
84
44
16
41
44
47
87
58
122
74
93
93
48
17
42
44
54
80
77
97
133
105
90
51
18
44
44
64
61
90
105
58
40
54
43
19
43
47
87
80
93
97
126
45
44
20
38
50
50
100
49
84
133
45
61
21
35
46
64
71
67
84
126
49
80
22
42
44
54
71
77
80
140
67
100
23
41
45
46
71
93
64
61
100
87
24
38
48
44
67
129
105
44
112
51
25
39
58
46
50
100
87
35
136
61
26
41
48
46
49
101
108
49
119
40
27
43
54
49
51
112
93
133
136
50
28
42
47
61
49
105
115
154
140
41
29
41
67
71
71
140
97
115
42
30
43
77
80
93
84
108
105
87
31
45
90
67
133
77