Ozone Monitor Stations

These readings represent one hour (1 hr) average ozone parts per million (ppm), as reported directly from the six ozone monitoring stations maintained by ADEQ throughout the state. Automated readings are processed hourly throughout the day, starting at approximately 2 am through midnight central standard time (CST).

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.

* PARRB = Pike Avenue & Riverfront Road

Ozone Monitor Stations - Hourly Readings

Current Data

( Last Updated 02/25/2017 , at 12:15 AM CST )

Time
(CST)
DSR
AR
El Dorado
AR
Marion
AR
PARRB
AR
Springdale
AR
2 AM0.0080.0120.0090.0080.014
3 AM0.0060.0110.0110.0060.012
4 AM0.0080.0100.0110.0070.013
5 AM0.0080.0120.0120.0070.016
6 AM0.0090.0090.0090.0080.012
7 AM0.0090.0060.0090.0080.010
8 AM0.0100.0090.0100.0100.007
9 AM0.0100.0110.0100.0100.005
10 AM0.0100.0100.0100.0100.005
11 AM0.0110.0080.0150.0110.004
12 Noon0.0120.0110.0060.0120.005
1 PM0.0110.0110.0070.0090.006
2 PM0.0110.0100.0080.0060.005
3 PM0.0070.0110.0100.0070.003
4 PM0.0010.0110.0110.0040.004
5 PM0.0060.0080.0110.0030.004
6 PM0.0070.0080.0150.0050.005
7 PM0.0060.0120.0220.0050.006
8 PM0.0070.0140.0150.0060.005
9 PM0.0060.0090.0060.0060.005
10 PM0.0040.0080.0050.0040.004
11 PM0.0040.0080.0050.0040.005
12 Midnight0.0040.0090.0040.0040.004

Yesterday's Data

( 02/24/2017 )

Time
(CST)
Deer
AR
Eagle Mountain
AR
Fayetteville
AR
Marion
AR
N Little Rock
Airport
PARRB
AR
Springdale
AR
2 AM0.049-0.9990.0550.0260.0380.0370.059
3 AM0.048-0.9990.0530.0320.0390.0370.057
4 AM0.049-0.9990.0520.0390.0390.0390.056
5 AM0.047-0.9990.0330.0380.0390.0360.024
6 AM0.045-0.9990.0180.0370.0370.0350.017
7 AM0.043-0.9990.0170.0330.0360.0340.018
8 AM0.042-0.9990.0190.0340.0340.0320.021
9 AM0.024-0.9990.0210.0370.0320.0300.023
10 AM0.017-0.9990.0220.0380.0320.0280.022
11 AM0.019-0.9990.0210.0400.0300.0280.020
12 Noon0.023-0.9990.0220.0420.0320.0310.021
1 PM0.029-0.9990.0230.0420.0330.0330.025
2 PM0.033-0.9990.0280.0400.0260.0270.030
3 PM0.035-0.9990.0340.0390.0330.0310.034
4 PM0.035-0.9990.0390.0370.0360.0350.038
5 PM0.036-0.9990.0390.0380.0350.0370.039
6 PM0.039-0.9990.0370.0340.0330.0360.037
7 PM0.037-0.9990.0350.0280.0320.0330.033
8 PM0.035-0.9990.0320.0210.0310.0300.031
9 PM0.032-0.9990.0310.0300.0320.0300.031
10 PM0.030-0.9990.0310.0300.0340.0330.032
11 PM0.030-0.9990.0320.0290.0330.0330.032
12 Midnight0.030-0.9990.0340.0300.0320.0320.034

AQI Numbers

The range for the AQI is 0-500 and is related to air quality as follows:

Index
Values
O3
(8hr)
(ppm)
O3
(1hr)
(ppm)
Air
Quality
Colors
0 - 50 0.000 - 0.054 0.000 - 0.084 Good Green
51 - 100 0.055 - 0.070 0.085 - 0.124 Moderate Yellow
100 - 150 0.071 - 0.085 0.125 - 0.164 Unhealthy for
Sensitive Groups
Orange
151 - 200 0.086 - 0.105 0.165 - 0.204 Unhealthy Red
201 - 300 0.106 - 0.200 0.205 - 0.404 Very Unhealthy Purple
301 - 400 0.201 & above 0.405 - 0.604 Hazardous Maroon

Explanation of Pollutant Categories

Pollutant Sensitive Group
O3 = Ozone Children and people with asthma
ppm = parts per million (1 part pollutant in 1 million parts of air)