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 01/20/2018 , at 02:15 AM CST )

Time
(CST)
Little Rock,
Doyle Springs
Road
El DoradoMarion N Little Rock,
Pike Ave &
River Rd
Springdale
1 AM 7.17.77.39.14.9
2 AM 6.18.77.013.56.6

Yesterday's Data

( 01/19/2018 )

Time
(CST)
Little Rock,
Doyle Springs
Road
El DoradoMarion N Little Rock,
Pike Ave &
River Rd
Springdale
1 AM 7.17.18.010.28.7
2 AM 7.67.63.17.67.5
3 AM 7.47.65.57.46.8
4 AM 8.87.34.98.08.2
5 AM 7.37.85.17.47.8
6 AM 8.89.06.28.58.5
7 AM 9.59.56.48.99.5
8 AM 9.69.78.610.111.2
9 AM 9.610.68.310.89.0
10 AM 9.79.311.110.611.4
11 AM 7.88.88.113.19.0
12 Noon 5.16.26.59.58.3
1 PM 4.14.74.43.96.4
2 PM 5.83.95.95.57.6
3 PM 6.13.46.25.58.5
4 PM 6.73.15.25.77.5
5 PM 7.53.96.86.27.6
6 PM 8.33.84.57.29.3
7 PM 8.45.24.77.210.1
8 PM 8.26.95.66.814.4
9 PM 9.45.55.17.712.9
10 PM 9.86.36.47.310.5
11 PM 9.86.67.57.78.0
12 Midnight7.57.46.47.75.6

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