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 08/24/2019 , at 6:15 PM CST )

Time
(CST)
Little Rock,
Doyle Springs
Road
Marion N Little Rock,
Pike Ave &
River Rd
Springdale
1 AM 7.16.76.36.0
2 AM 7.48.05.74.1
3 AM 6.18.65.74.7
4 AM 8.49.57.76.4
5 AM 8.89.88.14.6
6 AM 8.910.88.24.7
7 AM 9.07.77.63.3
8 AM 8.99.69.34.4
9 AM 8.98.49.44.5
10 AM 7.713.89.55.4
11 AM 7.810.19.43.9
12 Noon 16.910.210.52.7
1 PM 9.912.59.24.7
2 PM 5.915.48.62.6
3 PM 9.08.15.11.9
4 PM 7.117.84.12.9
5 PM 8.7-999.09.47.4
6 PM -999.0-999.07.5-999.0

Yesterday's Data

( 08/23/2019 )

Time
(CST)
Little Rock,
Doyle Springs
Road
Marion N Little Rock,
Pike Ave &
River Rd
Springdale
1 AM 3.38.43.05.7
2 AM 1.011.91.62.8
3 AM 2.713.00.81.1
4 AM 3.012.91.93.2
5 AM 6.211.14.65.1
6 AM 6.414.66.04.7
7 AM 8.710.94.95.0
8 AM 7.612.86.17.2
9 AM 7.713.07.26.6
10 AM 6.314.85.610.3
11 AM 5.816.15.69.2
12 Noon 3.812.05.14.9
1 PM 4.416.33.64.3
2 PM 6.05.25.25.5
3 PM 6.59.95.15.2
4 PM 8.16.06.26.6
5 PM 9.111.46.04.9
6 PM 9.46.57.06.1
7 PM 10.07.75.88.8
8 PM 7.76.76.89.0
9 PM 8.37.27.27.6
10 PM 7.66.57.07.3
11 PM 8.27.96.86.7
12 Midnight7.67.85.56.5

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