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 06/30/2025 , at 11:15 PM CST )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 9.18.23.14.6
2 AM 3.58.24.24.0
3 AM 8.26.64.25.3
4 AM 5.80.44.54.3
5 AM 4.60.54.15.1
6 AM 7.42.34.06.3
7 AM 12.73.54.715.5
8 AM 10.06.05.913.9
9 AM 9.27.09.011.5
10 AM 3.312.610.211.0
11 AM 4.813.810.5
12 Noon 7.411.410.61.3
1 PM 8.710.210.44.7
2 PM 4.911.011.62.3
3 PM 8.38.69.25.9
4 PM 7.19.38.65.9
5 PM 9.813.09.16.0
6 PM 13.17.39.24.7
7 PM 17.011.48.16.5
8 PM 9.210.84.83.7
9 PM 12.710.95.28.0
10 PM 6.113.15.1
11 PM 4.6

Yesterday's Data

( 06/29/2025 )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 8.66.96.09.4
2 AM 12.53.95.68.5
3 AM 8.35.76.210.9
4 AM 5.35.75.99.4
5 AM 1.64.75.79.6
6 AM 9.86.65.810.8
7 AM 4.07.76.213.3
8 AM 11.37.57.012.9
9 AM 13.38.79.516.3
10 AM 12.411.213.012.2
11 AM 13.513.614.711.9
12 Noon 7.711.013.87.4
1 PM 0.88.013.07.4
2 PM 2.97.013.16.3
3 PM 8.69.613.07.2
4 PM 10.44.611.67.2
5 PM 5.317.911.98.1
6 PM 13.913.311.7
7 PM 17.011.411.12.7
8 PM 10.38.110.50.1
9 PM 8.710.210.43.7
10 PM 7.48.87.62.7
11 PM 3.95.53.03.2
12 Midnight4.47.52.94.7

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