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 04/22/2026 , at 03:15 AM CST )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 11.013.58.17.7
2 AM 13.18.2
3 AM 8.9

Yesterday's Data

( 04/21/2026 )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 20.313.213.110.6
2 AM 17.511.717.18.1
3 AM 21.212.816.17.5
4 AM 22.413.217.98.0
5 AM 19.813.017.29.0
6 AM 15.015.720.012.0
7 AM 17.017.921.313.9
8 AM 12.515.522.36.9
9 AM 14.312.719.011.4
10 AM 0.013.015.410.7
11 AM 10.512.112.610.0
12 Noon 15.08.29.18.8
1 PM 6.17.97.49.3
2 PM 2.47.67.413.1
3 PM 12.17.67.411.0
4 PM 3.88.08.29.9
5 PM 15.010.48.16.3
6 PM 6.59.45.9
7 PM 6.911.67.64.7
8 PM 9.112.07.77.5
9 PM 11.712.08.17.7
10 PM 11.914.18.85.9
11 PM 8.612.89.34.8
12 Midnight11.913.18.08.2

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 - 9.0 0 - 54 Good Green
51 - 100 9.1 - 35.4 55 - 154 Moderate Yellow
100 - 150 35.5 - 55.4 155 - 254 Unhealthy for
Sensitive Groups
Orange
151 - 200 55.5 - 125.4 255 - 354 Unhealthy Red
201 - 300 125.5 - 225.4 355 - 424 Very Unhealthy Purple
301 - 400 225.5+ 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