Air Quality Monitor

This page displays current air quality data for the Grand Canyon bench monitor, which is operated by the National Park Service. All data are preliminary.

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Current Air Quality: Grand Canyon bench

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

N/A

Past 48-Hours


PM2.5

N/A

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
PM2.5
1/26/2023
1/27/2023
44
1/28/2023
1/29/2023
47
1/30/2023
45
1/31/2023
55
2/1/2023
52

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
PM2.5
Daily High For February 2
44
2/2/2022
-1.6
2/2/2022
Daily Low For February 2
44
2/2/2022
-1.6*
2/2/2022
Monthly High For February
53
2/15/2022
0.8
2/22/2022
Monthly Low For February
42
2/19/2022
-1.9*
2/23/2022
All-Time High
69
4/26/2022
19.9
7/23/2022
All-Time Low
25
9/21/2022
-3.1*
1/1/2022

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.
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Historical Data

Access historical data from the monitor. Historical Data >