Yesterday’s Data

* The Port of Los Angeles completed its upgrade of the air quality monitoring network on October 12, 2023. Click here for current operational status.
* ALL DATA IS PRELIMINARY.
* DATA IS PRESENTED IN PACIFIC STANDARD TIME EVEN DURING DAYLIGHT SAVINGS TIME.

Select A Site
Monitored ParameterAveraging PeriodMax ValueUnitsState StandardFederal StandardAir Quality Index
O3 1 hr 0.042 ppm 0.090 -- --
O3 8 hr 0.036 ppm 0.070 0.070 Good
PM10 24 hr 10.7 ug/m3 50.0 150.0 Good
PM2.5 24 hr 3.7 ug/m3 -- 35.0 Good
NO2 1 hr 0.035 ppm 0.180 0.100 Good
CO 1 hr 0.8 ppm 20.0 35.0 Good
CO 8 hr 0.6 ppm 9.0 9.0 Good
SO2 1 hr 0.007 ppm -- 0.075 Good
SO2 24 hr -- ppm 0.040 0.140 --
Wind Speed 1 hr 8.9 mph -- -- --
Wind Direction 1 hr N direction -- -- --
BC 1 hr 0.960 ug/m3 -- -- --
BC 24 hr 0.410 ug/m3 -- -- --
Temperature 1 hr 66.5° deg F -- -- --
Relative Humidity 1 hr 86.8 % -- -- --
Rain 1 hr 0.53 in -- -- --
Rain-Daily Daily Total 0.83 in -- -- --
Rain-Monthly Monthly Total 20.21 in -- -- --
Rain-Annual Annual Total -- in -- -- --