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Air Quality Monitoring

Highest Readings by Year

Air Resource Management
Ad Hoc Reporting

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: Sydney
Ad Hoc Reporting

AQS # L057-3002

Sydney

 

10 Highest Daily Averages for Year 2023

 

CO Averages

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

DEC-31 0.71 0.679
DEC-30 0.41 0.449
DEC-1 0.38 0.436
JAN-16 0.37 0.474
OCT-3 0.37 0.503
JAN-11 0.36 0.386
JAN-17 0.36 0.412
FEB-1 0.34 0.431
MAR-11 0.33 0.402
NOV-9 0.33 0.445
Date
Max 1 Hour Avg

DEC-31 0.679
SEP-7 0.677
SEP-14 0.51
OCT-3 0.503
MAY-30 0.494
DEC-8 0.493
MAR-2 0.491
JAN-16 0.474
JAN-1 0.458
DEC-30 0.449

NO2 Averages

NO2 data below are shown in Parts Per Billion (PPB)
This site did not monitor NO2 during 2023

Ozone Averages

Ozone data below are shown in Parts Per Billion (PPB)
Date
Max 8 Hour Avg
1 Hour Avg

APR-18 61 66
MAY-4 61 68
MAR-30 60 67
MAY-5 60 67
JUN-26 60 73
OCT-3 59 70
JUN-30 58 66
OCT-23 58 68
FEB-14 57 63
MAY-3 57 58
Date
Max 1 Hour Avg

JUN-26 73
OCT-3 70
MAY-4 68
MAY-10 68
OCT-23 68
MAR-30 67
MAY-5 67
JUN-29 67
APR-18 66
JUN-30 66

 

PM 2.5 Averages

PM 2.5 data below are shown in Micrograms Per Cubic Meter (mg/m3)
Date
Daily Average
 

OCT-3 34.9  
DEC-31 23.9  
FEB-24 17.6  
AUG-22 16.6  
OCT-2 16.5  
FEB-25 16.2  
MAR-3 15.8  
JUL-25 14.9  
AUG-23 14.4  
JAN-1 14.3  

 

PM 10 Averages

PM 10 data below are shown in Micrograms Per Cubic Meter (mg/m3)
This site did not monitor PM 10 during 2023

SO2 Averages

SO2 data below are shown in Parts Per Billion (PPB)
Date
Max Daily (24-Hour) Avg
1 Hour Avg

JAN-30 2 16.984
FEB-2 2 7.862
FEB-9 2 8.276
MAR-4 2 4.756
MAY-6 2 4.556
JAN-16 1 5.8
JAN-19 1 1.054
JAN-20 1 1.356
JAN-21 1 0.724
JAN-22 1 1.207
Date
Max 1 Hour Avg

JAN-30 16.984
MAR-1 10.852
FEB-9 8.276
FEB-2 7.862
FEB-14 7.355
FEB-7 6.716
FEB-21 6.46
FEB-17 5.891
JAN-16 5.8
JUL-21 5.356

Federal Air Quality Standard
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Last updated: March 02, 2017

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