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 06/21/2024 , at 09:15 AM CST )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 23.68.613.48.2
2 AM 26.46.512.89.7
3 AM 29.26.913.29.2
4 AM 30.07.612.09.9
5 AM 21.08.011.69.7
6 AM 22.37.011.710.5
7 AM 21.47.713.1
8 AM 20.414.0
9 AM 17.4

Yesterday's Data

( 06/20/2024 )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 13.27.012.512.6
2 AM 12.36.711.910.6
3 AM 13.07.311.712.5
4 AM 14.28.012.511.6
5 AM 15.18.512.413.3
6 AM 16.26.612.513.9
7 AM 18.15.812.914.7
8 AM 16.16.312.817.5
9 AM 15.46.914.417.2
10 AM 15.97.514.214.8
11 AM 15.46.914.410.2
12 Noon 13.76.613.612.6
1 PM 15.26.012.910.7
2 PM 14.76.115.99.2
3 PM 11.512.2
4 PM 15.111.5
5 PM 10.66.210.95.8
6 PM 12.86.910.45.1
7 PM 18.07.011.28.5
8 PM 16.27.711.411.4
9 PM 18.08.411.711.6
10 PM 22.110.511.512.3
11 PM 22.97.610.812.2
12 Midnight22.78.211.711.5

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