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 07/02/2020 , at 08:15 AM CST )

Time
(CST)
Little Rock,
Doyle Springs
Road
Marion N Little Rock,
Pike Ave &
River Rd
Springdale
1 AM 6.04.34.819.4
2 AM 5.34.94.918.3
3 AM 6.93.95.419.0
4 AM 6.88.85.118.9
5 AM 7.47.45.618.7
6 AM 7.47.47.019.0
7 AM 13.015.08.725.8
8 AM 13.813.4-999.029.0

Yesterday's Data

( 07/01/2020 )

Time
(CST)
Little Rock,
Doyle Springs
Road
Marion N Little Rock,
Pike Ave &
River Rd
Springdale
1 AM 22.522.820.427.0
2 AM 21.922.219.124.1
3 AM 23.221.820.223.2
4 AM 24.123.523.221.6
5 AM 23.825.621.221.5
6 AM 24.725.621.521.2
7 AM 23.724.722.326.4
8 AM 24.829.224.823.8
9 AM 23.125.020.623.6
10 AM 21.722.218.311.1
11 AM 20.120.616.5-0.6
12 Noon 17.415.415.30.0
1 PM 19.013.917.47.9
2 PM 17.915.215.712.3
3 PM 17.111.714.916.3
4 PM 10.4-2.20.818.2
5 PM 7.3-3.46.719.9
6 PM 10.5-8.27.019.1
7 PM 10.516.58.420.7
8 PM 10.58.17.720.3
9 PM 11.77.88.721.9
10 PM 15.03.48.924.3
11 PM 14.24.38.819.7
12 Midnight7.46.04.918.3

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