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 07/06/2022 , at 03:15 AM CST )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 13.5-37.715.79.0
2 AM 13.8-32.517.010.1
3 AM 13.8-34.418.211.2

Yesterday's Data

( 07/05/2022 )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 11.48.916.512.0
2 AM 10.78.613.010.2
3 AM 8.68.613.39.6
4 AM 10.07.712.58.1
5 AM 9.67.812.38.1
6 AM 11.06.913.18.0
7 AM 11.27.312.77.9
8 AM 10.47.615.210.9
9 AM 9.27.516.74.3
10 AM 9.26.213.35.3
11 AM 12.26.311.36.0
12 Noon 7.10.311.35.9
1 PM 8.4-34.012.18.4
2 PM 6.0-32.512.24.1
3 PM 6.7-32.411.25.5
4 PM 8.8-32.210.44.3
5 PM 10.6-31.410.73.5
6 PM 10.3-31.711.85.3
7 PM 9.5-30.811.910.7
8 PM 12.3-29.812.712.0
9 PM 13.9-29.014.216.7
10 PM 11.6-27.714.617.6
11 PM 13.7-27.815.216.3
12 Midnight13.6-29.515.611.5

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 - 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