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 10/21/2025 , at 11:15 AM CST )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 8.87.57.04.8
2 AM 11.19.96.33.0
3 AM 10.77.66.46.6
4 AM 9.68.56.97.4
5 AM 5.47.86.46.8
6 AM 4.68.06.38.3
7 AM 5.88.96.110.4
8 AM 7.08.35.816.5
9 AM 5.08.55.68.9
10 AM 7.35.0
11 AM 4.5

Yesterday's Data

( 10/20/2025 )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 10.05.512.52.1
2 AM 9.45.313.42.9
3 AM 10.15.112.03.2
4 AM 8.54.911.32.5
5 AM 8.86.110.61.5
6 AM 6.37.011.72.4
7 AM 7.38.410.03.5
8 AM 10.09.39.15.6
9 AM 9.16.07.37.9
10 AM 1.83.05.27.4
11 AM 4.13.05.78.5
12 Noon 4.50.75.66.6
1 PM 4.31.05.18.4
2 PM 0.24.68.7
3 PM 8.31.44.78.3
4 PM 8.22.54.311.5
5 PM 1.74.64.69.6
6 PM 10.46.45.010.1
7 PM 11.56.84.913.7
8 PM 15.58.57.810.0
9 PM 11.510.37.45.0
10 PM 8.86.510.58.3
11 PM 10.06.28.69.4
12 Midnight11.86.97.65.8

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