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 10/06/2022 , at 2:15 PM CST )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 20.313.0-999.013.5
2 AM 21.913.6-999.012.5
3 AM 21.612.4-999.012.5
4 AM 20.513.5-999.012.4
5 AM 19.314.5-999.013.3
6 AM 19.116.7-999.012.3
7 AM 19.328.4-999.012.7
8 AM 14.930.9-999.020.0
9 AM 12.524.1-999.016.2
10 AM 7.320.6-999.06.8
11 AM 2.541.4-999.07.8
12 Noon 2.117.7-999.05.3
1 PM -999.012.3-999.05.4
2 PM -999.0-999.0-999.0-999.0

Yesterday's Data

( 10/05/2022 )

Time
(CST)
Little Rock,
Doyle Springs
Road
MarionPARRSpringdale
1 AM 29.37.0-999.05.9
2 AM 32.96.9-999.07.9
3 AM 34.46.6-999.08.1
4 AM 34.76.7-999.08.5
5 AM 32.56.7-999.010.5
6 AM 29.66.7-999.013.6
7 AM 27.511.0-999.015.2
8 AM 28.16.5-999.018.6
9 AM 7.09.9-999.014.3
10 AM 17.58.2-999.013.3
11 AM 15.56.8-999.013.3
12 Noon 13.36.6-999.011.5
1 PM 11.85.8-999.010.7
2 PM 12.06.3-999.09.1
3 PM 13.06.8-999.011.4
4 PM 13.97.3-999.09.3
5 PM 11.98.3-999.011.0
6 PM 14.08.8-999.010.9
7 PM 16.29.7-999.014.6
8 PM 18.211.1-999.018.7
9 PM 17.413.4-999.018.8
10 PM 21.213.6-999.020.4
11 PM 20.913.2-999.019.2
12 Midnight19.411.6-999.016.7

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 - 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