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 09/30/2020 , at 02:15 AM CST )

Time
(CST)
Little Rock,
Doyle Springs
Road
Marion N Little Rock,
Pike Ave &
River Rd
Springdale
1 AM 11.86.3-999.06.4
2 AM 12.35.6-999.0-999.0

Yesterday's Data

( 09/29/2020 )

Time
(CST)
Little Rock,
Doyle Springs
Road
Marion N Little Rock,
Pike Ave &
River Rd
Springdale
1 AM 3.85.14.37.4
2 AM 3.44.13.85.5
3 AM 4.43.14.54.2
4 AM 6.15.04.35.4
5 AM 7.25.85.25.8
6 AM 6.14.85.56.4
7 AM 10.35.85.38.1
8 AM 6.66.54.110.8
9 AM 5.36.44.47.8
10 AM 1.74.05.06.3
11 AM 2.53.23.74.2
12 Noon 3.03.33.32.0
1 PM 1.64.01.21.8
2 PM 2.34.83.60.5
3 PM 1.23.13.33.3
4 PM 5.05.84.70.8
5 PM 5.36.34.72.3
6 PM 7.07.25.54.0
7 PM 12.110.27.35.9
8 PM 11.713.68.29.9
9 PM 12.08.78.812.6
10 PM 13.94.19.19.9
11 PM 11.27.0-999.08.1
12 Midnight8.95.8-999.07.6

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