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 08/20/2019 , at 11:15 PM CST )

Time
(CST)
Little Rock,
Doyle Springs
Road
Marion N Little Rock,
Pike Ave &
River Rd
Springdale
1 AM 10.38.514.516.3
2 AM 10.97.516.917.0
3 AM 12.08.120.619.1
4 AM 12.18.221.717.5
5 AM 12.18.519.618.1
6 AM 12.88.220.322.8
7 AM 14.413.720.426.7
8 AM 14.410.99.528.4
9 AM 11.210.615.228.2
10 AM 10.112.812.020.1
11 AM 7.410.711.325.2
12 Noon 12.610.27.216.1
1 PM 7.08.011.216.9
2 PM 7.86.56.514.9
3 PM 8.87.86.713.3
4 PM 15.710.76.323.4
5 PM 16.112.76.521.2
6 PM 15.512.37.521.1
7 PM 13.513.59.829.9
8 PM 12.06.27.710.5
9 PM 6.94.611.517.3
10 PM 0.90.81.521.8
11 PM 0.9-999.0-1.120.9

Yesterday's Data

( 08/19/2019 )

Time
(CST)
Little Rock,
Doyle Springs
Road
Marion N Little Rock,
Pike Ave &
River Rd
Springdale
1 AM 5.65.27.96.7
2 AM 5.26.38.07.7
3 AM 6.29.08.69.2
4 AM 5.95.58.510.8
5 AM 6.86.39.013.3
6 AM 8.07.310.616.1
7 AM 8.68.712.718.7
8 AM 9.78.013.321.6
9 AM 11.79.915.025.9
10 AM 13.811.015.024.3
11 AM 11.512.517.718.5
12 Noon 12.013.214.913.3
1 PM 9.39.817.215.3
2 PM 16.412.612.37.3
3 PM 6.78.616.613.9
4 PM 10.616.811.912.2
5 PM 10.419.912.319.4
6 PM 13.519.914.629.1
7 PM 17.115.215.111.9
8 PM 13.216.921.815.7
9 PM 13.512.919.721.2
10 PM 12.711.719.218.2
11 PM 11.710.821.417.0
12 Midnight10.312.413.415.1

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