Highest Readings by Year
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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: East Bay
 Ad Hoc Reporting

AQS # L057-0109
East Bay

10 Highest Daily Averages for Year 2025


CO Averages

CO data below are shown in Parts Per Million (PPM)
This site did not monitor CO during 2025.

NO2 Averages

NO2 data below are shown in Parts Per Billion (PPB)
This site did not monitor NO2 during 2025.

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)
Date
Max Daily (24-Hour) Average
1 Hour Average
MAR-17 15.900 50.600
MAR-11 9.570 40.600
JAN-24 6.920 32.400
MAR-06 6.090 28.300
JAN-17 4.930 46.800
APR-09 4.540 17.700
FEB-20 4.510 31.600
FEB-25 4.070 14.300
MAR-10 4.050 37.900
FEB-16 3.870 18.500

Date
Max 1 Hour Average
 
MAR-17 50.600  
JAN-17 46.800  
MAR-11 40.600  
MAR-18 40.600  
MAR-10 37.900  
JAN-19 37.300  
JAN-24 32.400  
FEB-20 31.600  
MAR-06 28.300  
JAN-11 18.900  
* = Value Not Available

Federal Air Quality Standard
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