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 08/27/2025 , at 2:15 PM CST )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 11.66.64.99.7
2 AM 10.35.14.98.2
3 AM 10.07.25.17.9
4 AM 10.16.54.66.0
5 AM 10.86.74.38.4
6 AM 11.67.04.69.4
7 AM 14.59.04.211.3
8 AM 13.68.74.214.0
9 AM 7.87.84.68.4
10 AM 5.95.17.3
11 AM 5.84.24.64.7
12 Noon 4.74.73.53.6
1 PM 6.53.1
2 PM 3.0

Yesterday's Data

( 08/26/2025 )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 7.69.63.95.5
2 AM 11.76.83.96.2
3 AM 10.07.83.95.9
4 AM 7.88.63.64.0
5 AM 5.38.03.54.6
6 AM 8.57.03.37.1
7 AM 9.97.43.28.2
8 AM 8.27.83.68.3
9 AM 6.18.84.18.5
10 AM 6.36.13.211.0
11 AM 6.73.93.310.7
12 Noon 6.73.63.55.9
1 PM 6.53.83.66.4
2 PM 9.63.94.03.8
3 PM 11.84.34.35.6
4 PM 4.64.05.05.3
5 PM 10.05.25.72.1
6 PM 15.97.36.83.8
7 PM 15.47.45.15.5
8 PM 13.75.78.6
9 PM 14.25.515.1
10 PM 13.26.75.215.0
11 PM 13.96.75.012.5
12 Midnight12.65.55.410.5

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 - 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