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Air Quality Monitoring

Monthly Readings
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: Presidents' Drive Near Road
 Ad Hoc Reporting

AQS # L095-0011
Presidents' Drive Near Road
Orange County

Readings for February 2025

CO Data


CO data below are shown in Parts Per Million (PPM)
Date
1 Hr Avg.
8 Hr Avg.
Date
1 Hr Avg.
8 Hr Avg.
FEB-1 0.5 0.43 FEB-17 0.4 0.31
FEB-2 0.5 0.5 FEB-18 0.4 0.39
FEB-3 0.6 0.53 FEB-19 0.6 0.53
FEB-4 0.8 0.63 FEB-20 0.5 0.4
FEB-5 0.7 0.59 FEB-21 0.3 0.3
FEB-6 0.6 0.53 FEB-22 0.7 0.74
FEB-7 0.7 0.54 FEB-23 0.9 0.73
FEB-8 0.7 0.65 FEB-24 0.6 0.51
FEB-9 0.8 0.66 FEB-25 0.9 0.68
FEB-10 0.8 0.63 FEB-26 0.9 0.79
FEB-11 0.6 0.46 FEB-27 1 0.84
FEB-12 0.6
*
 FEB-28 0.9 0.64
FEB-13 0.6 0.53
FEB-14 0.4 0.4
FEB-15 0.4 0.4
FEB-16 0.5 0.44
* = Value Not Available
Federal Air Quality Standard
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NO2 Data


NO2 data below are shown in Parts Per Billion (PPB)
Date
1 Hr Avg.
Date
1 Hr Avg.
FEB-1 21.1 FEB-17 30.2
FEB-2 7.3 FEB-18 14.5
FEB-3 19.5 FEB-19 27
FEB-4 22.6 FEB-20 32
FEB-5 43.2 FEB-21 11.5
FEB-6 34.2 FEB-22 32.3
FEB-7 28.1 FEB-23 32
FEB-8 34.3 FEB-24 25.8
FEB-9 29.8 FEB-25 33.7
FEB-10 29.2 FEB-26 38.8
FEB-11 18.3 FEB-27 42.1
FEB-12 22.1 FEB-28 40.8
FEB-13 20.8
FEB-14 12.3
FEB-15 15.9
FEB-16 16.6
* = Value Not Available
Federal Air Quality Standard
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This site did not monitor SO2 during February, 2025.
This site did not monitor Ozone during February, 2025.

PM 2.5 Data


PM 2.5 data below are shown in Micrograms Per Cubic Meter (μg/m3)
Date
Daily Avg.
Date
Daily Avg.
FEB-1 6.5 FEB-17 5.8
FEB-2 7.8 FEB-18 6.1
FEB-3 7.6 FEB-19 7.7
FEB-4 8.7 FEB-20 5.2
FEB-5 9.5 FEB-21 6.4
FEB-6 8.2 FEB-22 4.3
FEB-7 11.9 FEB-23 7.4
FEB-8 10.5 FEB-24 5.6
FEB-9 8.1 FEB-25 6.7
FEB-10 7.4 FEB-26 12.8
FEB-11 8.1 FEB-27 12.4
FEB-12 8.4 FEB-28 8.4
FEB-13 9.9
FEB-14 7.6
FEB-15 6.7
FEB-16 6.8
* = Value Not Available
Federal Air Quality Standard
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This site did not monitor PM 10 during February, 2025.