Air Quality Monitor

This page displays current air quality data for the Thirty-Third monitor, which is operated by the Maricopa County Air Quality Department. All data are preliminary.

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Current Air Quality: Thirty-Third

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.

NO2

29 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
NO2
1/26/2023
44
1/27/2023
47
1/28/2023
43
1/29/2023
34
1/30/2023
38
1/31/2023
32
2/1/2023
41

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.
NO2
Daily High For February 2
65
2/2/2018
Daily Low For February 2
37
2/2/2019
Monthly High For February
75
2/1/2018
Monthly Low For February
19
2/22/2020
All-Time High
82
12/20/2022
All-Time Low
5
8/25/2019

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.
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Historical Data

Access historical data from the monitor. Historical Data >