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 12/03/2023 , at 3:15 PM CST )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 17.41.118.27.3
2 AM 14.16.411.65.2
3 AM 13.519.210.25.7
4 AM 9.87.611.64.1
5 AM 10.84.710.93.4
6 AM 10.65.97.93.8
7 AM 9.25.26.55.4
8 AM 10.16.56.66.1
9 AM 8.37.26.19.2
10 AM 1.17.07.44.3
11 AM 2.22.78.23.5
12 Noon 0.76.51.2
1 PM 0.94.45.6
2 PM 0.43.64.9
3 PM 4.6

Yesterday's Data

( 12/02/2023 )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 11.04.54.74.9
2 AM 11.65.64.94.4
3 AM 9.16.54.94.2
4 AM 8.87.510.83.5
5 AM 9.27.25.94.0
6 AM 7.88.05.04.5
7 AM 8.36.24.44.0
8 AM 7.25.64.65.1
9 AM 6.33.94.94.3
10 AM 4.02.24.86.9
11 AM 2.14.32.0
12 Noon 1.12.54.12.5
1 PM 0.35.13.81.6
2 PM 1.95.74.32.9
3 PM 3.84.84.57.0
4 PM 4.15.45.06.3
5 PM 24.38.14.86.3
6 PM 23.67.84.37.4
7 PM 9.78.84.87.4
8 PM 15.89.76.18.7
9 PM 11.79.08.17.2
10 PM 16.57.07.77.6
11 PM 24.97.910.98.5
12 Midnight18.67.514.89.3

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 - 12.0 0 - 54 Good Green
51 - 100 12.1 - 35.4 55 - 154 Moderate Yellow
100 - 150 35.5 - 55.4 155 - 254 Unhealthy for
Sensitive Groups
Orange
151 - 200 55.5 - 150.4 255 - 354 Unhealthy Red
201 - 300 150.5 - 250.4 355 - 424 Very Unhealthy Purple
301 - 400 250.5 - 500.4 425 - 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