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 03/18/2019 , at 5:15 PM CST )

Time
(CST)
Little Rock,
Doyle Springs
Road
El DoradoMarion N Little Rock,
Pike Ave &
River Rd
Springdale
1 AM 17.316.20.913.87.5
2 AM 13.214.75.57.911.6
3 AM 9.513.55.47.310.2
4 AM 9.913.87.29.69.3
5 AM 11.314.77.412.57.6
6 AM 12.012.78.711.77.6
7 AM 11.413.77.011.14.9
8 AM 10.213.54.410.08.1
9 AM 7.17.46.56.810.3
10 AM 6.213.66.76.110.7
11 AM 3.910.72.33.99.2
12 Noon 4.18.03.12.96.0
1 PM 7.19.77.83.87.0
2 PM 4.27.54.53.61.7
3 PM 3.511.00.32.55.5
4 PM 6.212.42.56.16.1
5 PM 9.3-999.01.35.35.5

Yesterday's Data

( 03/17/2019 )

Time
(CST)
Little Rock,
Doyle Springs
Road
El DoradoMarion N Little Rock,
Pike Ave &
River Rd
Springdale
1 AM 12.315.313.99.317.1
2 AM 13.512.610.810.112.9
3 AM 13.89.69.310.412.2
4 AM 17.07.110.610.713.4
5 AM 18.38.510.516.513.0
6 AM 16.79.210.814.412.6
7 AM 16.310.011.413.310.7
8 AM 13.910.6-1.911.214.8
9 AM 12.53.32.46.915.6
10 AM 9.55.35.77.218.6
11 AM 9.24.56.24.414.1
12 Noon 8.33.14.79.77.4
1 PM 5.73.27.95.37.0
2 PM 5.76.35.15.08.8
3 PM 6.512.41.66.75.7
4 PM 7.014.93.36.07.2
5 PM 6.919.65.55.88.0
6 PM 8.724.611.27.58.5
7 PM 10.625.419.411.49.3
8 PM 18.523.317.512.59.4
9 PM 23.230.823.310.98.4
10 PM 20.636.99.915.08.3
11 PM 27.915.013.215.715.5
12 Midnight16.214.011.214.16.3

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