Air Quality Monitor

Updated On: 3/31/2023 - 8:31 AM
This page displays current air quality data for the Central Phoenix monitor, which is operated by the Maricopa County Air Quality Department. All data are preliminary.

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Current Air Quality: Central Phoenix Updated: 3/31/2023 - 8:31 AM

Current concentrations for each available pollutant, along with a graph displaying hourly data over the past 48-hours. The colors are using the AQI color scheme to highlight periods of good or poor air quality. Values are updated hourly at 30 minutes past the hour.

Ozone

15 ppb

Past 48-Hours

PM10

30 µg/m3

Past 48-Hours

CO

0.4 ppm

Past 48-Hours

SO2

0 ppb

Past 48-Hours

NO2

19 ppb

Past 48-Hours


Past Seven Days

Concentration values for the past seven days for each available pollutant. While the table displays concentrations, the color corresponds to the Air Quality Index (AQI).
Date
Ozone
(ppb)
Max 8-Hour Avg
PM10
(µg/m3)
24-Hour Avg
CO
(ppm)
Max 8-Hour Avg
SO2
(ppb)
Max 1-Hour
NO2
(ppb)
Max 1-Hour
3/24/2023
48
23
0.5
0
22
3/25/2023
50
27
0.5
0
36
3/26/2023
52
18
0.3
0
17
3/27/2023
51
22
0.5
1
35
3/28/2023
52
37
0.6
1
38
3/29/2023
50
27
0.4
1
28
3/30/2023
50
30
0.3
0
12

Station History

The table displays the current day, month, and all-time high and low concentrations for each pollutant, along with the day on which the value occurred. If a tie occurs, the date displayed will be the most recent occurrence.
Ozone
(ppb)
Max 8-Hour Avg
PM10
(µg/m3)
24-Hour Avg
CO
(ppm)
Max 8-Hour Avg
SO2
(ppb)
Max 1-Hour
NO2
(ppb)
Max 1-Hour
Daily High For March 31
64
3/31/2002
76
3/31/2017
18.9
3/31/1969
20.0
3/31/1973
120
3/31/1967
Daily Low For March 31
0
3/31/1979
15
3/31/1998
0.3
3/31/2010
0.0
3/31/2020
29
3/31/2022
Monthly High For March
78
3/13/1980
133
3/10/2006
27.6
3/9/1967
50.0
3/8/1973
340
3/23/1967
Monthly Low For March
0
3/31/1979
4
3/15/1998
0.0
3/1/1977
0.0
3/30/2023
0
3/19/1974
All-Time High
121
8/24/1982
340
6/27/2012
46.1
12/18/1966
17000.0
5/5/1967
1000
6/28/1973
All-Time Low
0
2/29/1988
2
1/7/2016
0.0
9/10/2022
0.0
3/30/2023
0
12/10/2022
*Negative values can occur when concentrations are below the detectable limits of the instrument.
Period of Record By Pollutant:
Ozone - 1/20/1975
PM10 - 1/3/1997
CO - 12/1/1966
SO2 - 1/17/1967
NO2 - 2/1/1967
Note: Gaps may exist in the period of record and is only for continous monitor data (not filter).

Exceedances This Year

A list of the number of exceedances since the start of the year for each available pollutant. Expand the pollutant to view the date and concentration of each exceedance.
No exceedance days.
No exceedance days.
No exceedance days.
No exceedance days.
No exceedance days.
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Historical Data

Access historical data from the monitor. Historical Data >