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 10/06/2025 , at 4:15 PM CST )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 7.48.19.66.8
2 AM 5.94.58.25.8
3 AM 5.65.86.86.0
4 AM 6.35.86.57.3
5 AM 6.35.55.96.9
6 AM 7.25.96.28.5
7 AM 6.64.96.39.4
8 AM 8.55.67.013.5
9 AM 9.17.68.015.2
10 AM 4.56.68.014.4
11 AM 12.55.510.010.2
12 Noon 4.35.87.13.0
1 PM 4.65.86.55.6
2 PM 8.04.34.5
3 PM 3.96.63.5
4 PM 2.5

Yesterday's Data

( 10/05/2025 )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 8.07.813.011.4
2 AM 6.96.512.213.0
3 AM 7.79.111.014.8
4 AM 7.69.810.617.0
5 AM 8.19.512.6
6 AM 9.99.711.6
7 AM 10.69.410.1
8 AM 9.710.710.8
9 AM 10.09.3
10 AM 7.58.29.2
11 AM 7.04.98.93.5
12 Noon 14.61.78.64.8
1 PM 3.64.38.04.1
2 PM 11.93.47.45.2
3 PM 26.53.112.65.5
4 PM 15.84.013.33.4
5 PM 24.44.710.67.3
6 PM 18.25.915.18.7
7 PM 16.07.58.28.2
8 PM 12.07.87.09.4
9 PM 10.86.512.48.5
10 PM 15.56.118.37.6
11 PM 10.36.115.56.5
12 Midnight8.56.813.16.6

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