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 ADEQ 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 11/21/2019 , at 12:15 PM CST )

Time
(CST)
Little Rock,
Doyle Springs
Road
Marion N Little Rock,
Pike Ave &
River Rd
Springdale
1 AM 11.010.38.917.4
2 AM 15.69.214.021.1
3 AM 17.513.117.117.1
4 AM 17.613.115.011.6
5 AM 18.411.416.110.9
6 AM 18.414.618.411.2
7 AM 15.513.016.211.5
8 AM 13.714.014.111.4
9 AM 12.315.411.511.4
10 AM 14.412.610.411.3
11 AM 9.09.7-999.010.9
12 Noon 7.19.8-999.08.1

Yesterday's Data

( 11/20/2019 )

Time
(CST)
Little Rock,
Doyle Springs
Road
Marion N Little Rock,
Pike Ave &
River Rd
Springdale
1 AM 23.312.820.63.5
2 AM 19.49.620.33.8
3 AM 25.06.121.44.2
4 AM 20.86.625.65.6
5 AM 19.36.427.26.6
6 AM 20.97.622.46.8
7 AM 22.77.521.89.2
8 AM 23.414.523.611.4
9 AM 22.414.313.212.4
10 AM 20.92.211.415.9
11 AM 9.50.110.58.7
12 Noon 7.41.65.34.4
1 PM 7.73.17.15.1
2 PM 12.63.36.59.3
3 PM 9.94.13.69.1
4 PM 7.16.12.99.7
5 PM 9.28.53.510.2
6 PM 19.99.86.311.2
7 PM 15.410.55.710.8
8 PM 9.09.75.39.6
9 PM 15.67.35.914.0
10 PM 10.67.56.113.0
11 PM 9.49.36.915.7
12 Midnight9.38.07.015.6

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 - 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