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 05/18/2024 , at 1:15 PM CST )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 5.98.06.75.9
2 AM 6.27.66.96.0
3 AM 5.79.07.09.0
4 AM 5.08.57.08.0
5 AM 7.07.35.78.5
6 AM 7.79.25.99.9
7 AM 12.68.15.914.7
8 AM 8.73.95.76.2
9 AM 3.87.65.411.0
10 AM 7.55.05.613.1
11 AM 5.65.8
12 Noon 6.2
1 PM 7.2

Yesterday's Data

( 05/17/2024 )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 11.86.410.911.5
2 AM 11.38.510.710.3
3 AM 9.513.110.311.6
4 AM 7.73.410.711.2
5 AM 7.88.010.312.8
6 AM 6.27.912.315.5
7 AM 5.73.311.213.8
8 AM 7.38.58.813.4
9 AM 8.524.18.214.2
10 AM 7.38.614.6
11 AM 7.64.29.217.1
12 Noon 9.020.810.210.6
1 PM 13.015.19.510.1
2 PM 6.412.89.412.2
3 PM 7.49.89.511.0
4 PM 9.29.39.011.8
5 PM 10.310.19.511.7
6 PM 11.59.710.25.2
7 PM 12.910.411.511.9
8 PM 14.711.911.913.4
9 PM 17.611.713.010.2
10 PM 19.512.412.96.8
11 PM 5.39.311.76.6
12 Midnight7.011.37.58.5

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