Highest Readings by Year
Air Quality Icon

Air Quality Monitoring

Highest Readings by Year
Air Resource Management
Data on this page are updated daily when complete data are received.

It is important to note that the ozone monitoring data less than three months old viewed on this website have generally not been verified and checked for quality assurance in accordance with federal requirements.


 More Details about: Perimeter Near-road
 Ad Hoc Reporting

AQS # L086-0035
Perimeter Near-road

10 Highest Daily Averages for Year 2025


CO Averages

CO data below are shown in Parts Per Million (PPM)
Date
Max 8 Hour Average
1 Hour Average

MAY-04 1.2 1.600
MAY-05 1.1 1.300
MAR-30 1.0 1.400
MAY-06 1.0 1.200
MAR-25 1.0 1.100
MAY-02 1.0 1.000
MAR-31 1.0 1.100
MAY-03 1.0 1.100
APR-28 0.9 1.100
MAY-01 0.9 1.000
 
Date
Max 1 Hour Average
 

MAY-04 1.600  
MAR-30 1.400  
MAY-05 1.300  
FEB-07 1.200  
MAY-06 1.200  
FEB-10 1.100  
MAR-25 1.100  
MAR-31 1.100  
APR-01 1.100  
APR-23 1.100  

NO2 Averages

NO2 data below are shown in Parts Per Billion (PPB)
Date
Max 1 Hour Average
 

JAN-30 55  
MAR-20 54.7  
MAR-13 54.6  
JAN-12 52.1  
MAR-11 50.4  
MAR-23 48.6  
FEB-27 47.8  
JAN-10 47.1  
MAR-08 45.5  
JAN-03 44.8  

Ozone Averages

Ozone data below are shown in Parts Per Billion (PPB)
This site did not monitor Ozone during 2025.

PM 2.5 Averages

PM 2.5 data below are shown in Micrograms Per Cubic Meter (μg/m3)
This site did not monitor PM 2.5 during 2025.

PM 10 Averages

PM 10 data below are shown in Micrograms Per Cubic Meter (μg/m3)
This site did not monitor PM 10 during 2025.

SO2 Averages

SO2 data below are shown in Parts Per Billion (PPB)
This site did not monitor SO2 during 2025.

Federal Air Quality Standard
Go To Top