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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 2020

 

CO Averages

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

JAN-1 0.66 0.812
JAN-7 0.57 0.666
JAN-6 0.53 0.405
DEC-13 0.46 0.525
DEC-12 0.45 0.427
DEC-23 0.44 0.597
MAR-1 0.42 0.543
DEC-26 0.42 0.393
DEC-9 0.41 0.497
DEC-27 0.41 0.49
Date
Max 1 Hour Avg

JAN-1 0.812
JAN-7 0.666
DEC-23 0.597
MAR-1 0.543
DEC-13 0.525
DEC-9 0.497
DEC-27 0.49
APR-5 0.484
DEC-10 0.462
DEC-11 0.449

NO2 Averages

NO2 data below are shown in Parts Per Billion (PPB)
This site did not monitor NO2 during 2020

Ozone Averages

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

MAY-2 69 75
APR-3 66 76
MAY-12 66 72
MAY-4 63 68
APR-22 62 71
APR-4 60 70
MAY-3 58 61
JUN-17 58 64
APR-2 57 64
MAY-8 57 59
Date
Max 1 Hour Avg

APR-3 76
MAY-2 75
MAY-12 72
APR-22 71
APR-4 70
MAY-4 68
APR-2 64
JUN-17 64
APR-28 63
JUN-25 63

 

PM 2.5 Averages

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

JAN-1 38.4  
JAN-20 23.3  
JUL-3 18.5  
APR-14 18.2  
JUN-27 18  
DEC-11 17.7  
SEP-5 17.3  
APR-13 17.2  
JUL-10 17.1  
DEC-9 17.1  

 

PM 10 Averages

PM 10 data below are shown in Micrograms Per Cubic Meter (mg/m3)
This site did not monitor PM 10 during 2020

SO2 Averages

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

AUG-8 2 14.96
JAN-1 1 0.821
JAN-2 1 1.952
JAN-3 1 1.05
JAN-4 1 0.949
JAN-7 1 0.674
JAN-8 1 0.711
JAN-9 1 0.584
JAN-10 1 0.85
JAN-11 1 1.222
Date
Max 1 Hour Avg

AUG-8 14.96
MAR-18 6.437
MAR-20 6.248
MAR-19 5.76
MAR-28 5.574
NOV-29 5.099
JUN-11 5.034
SEP-27 4.841
AUG-9 4.317
JUN-27 4.09

Federal Air Quality Standard
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Last updated: March 02, 2017

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