Particulate Matter Monitor Stations - Arkansas

These readings represent 1hr average PM2.5 (ug/m3), as reported directly from the particulate matter monitoring stations maintained by DEQ throughout the state. Automated readings are processed hourly throughout the day, starting at approx. 1 am through midnight central standard time.

NOTE: This information is "raw data" as automatically collected and reported by the monitoring stations and has not been quality control checked, analyzed, or verified.

Particulate Matter Monitor Stations - Arkansas Hourly Readings

Current Data

( Last Updated 06/01/2023 , at 11:15 AM CST )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 14.613.616.318.8
2 AM 16.015.017.516.8
3 AM 17.116.616.818.1
4 AM 18.414.716.519.0
5 AM 17.616.617.018.7
6 AM 18.318.017.421.9
7 AM 19.019.418.326.4
8 AM 13.421.918.834.6
9 AM 2.417.420.727.2
10 AM 20.9
11 AM 20.0

Yesterday's Data

( 05/31/2023 )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 30.012.620.815.6
2 AM 30.613.321.814.4
3 AM 29.514.322.315.1
4 AM 20.914.223.716.6
5 AM 18.214.822.817.3
6 AM 19.816.421.419.5
7 AM 20.715.123.920.9
8 AM 18.013.927.524.2
9 AM 13.211.530.225.8
10 AM 13.27.232.519.1
11 AM 21.212.629.519.7
12 Noon 16.09.024.419.8
1 PM 5.38.016.421.0
2 PM 15.110.216.118.6
3 PM 8.68.213.719.9
4 PM 13.49.412.719.5
5 PM 9.59.611.720.3
6 PM 10.310.711.820.1
7 PM 12.813.010.822.4
8 PM 16.416.310.926.9
9 PM 17.716.911.031.2
10 PM 21.215.312.432.1
11 PM 16.613.713.221.7
12 Midnight16.413.414.219.6

AQI Numbers

The range for the AQI is 0-500 and is related to air quality as follows:

Index
Values
PM2.5
(24hr)
(ug/m3)
PM10
(24hr)
(ug/m3)
Air
Quality
Colors
0 - 50 0.0 - 12.0 0 - 54 Good Green
51 - 100 12.1 - 35.4 55 - 154 Moderate Yellow
100 - 150 35.5 - 55.4 155 - 254 Unhealthy for
Sensitive Groups
Orange
151 - 200 55.5 - 150.4 255 - 354 Unhealthy Red
201 - 300 150.5 - 250.4 355 - 424 Very Unhealthy Purple
301 - 400 250.5 - 500.4 425 - 604 Hazardous Maroon

Explanation of Pollutant Categories

Pollutant Sensitive Group
PM10 = Particulate Matter < 10 microns People with respiratory or heart disease, the elderly and children
PM2.5 = Particulate Matter < 2.5 microns People with respiratory or heart disease, the elderly and children
ug/m3 = micrograms per cubic meter of air