Air Quality Year-to-Date Report

This report displays the daily ozone Air Quality Index (AQI) for 2018. Each daily value represents the highest monitor for the Phoenix area. The graph above 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
61
3
0

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
2
41
43
58
3
43
44
44
4
42
49
49
5
44
47
48
6
42
45
7
40
50
8
40
50
9
43
47
10
44
44
11
41
50
12
41
49
13
40
44
14
40
42
15
42
41
16
41
44
17
42
44
18
44
44
19
43
47
20
38
50
21
35
46
22
42
44
23
41
45
24
38
48
25
39
58
26
41
48
27
43
54
28
42
47
29
41
30
43
31
45