Yesterday’s Data

* The Coastal Boundary station was suspended in April 2020 (until further notice) due to future construction at the wharf.
* The Source-Dominated station was suspended in May 2021 (until further notice).
* 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 0.041 ppm 0.090 -- --
O3 8 hr 0.034 ppm 0.070 0.070 Good
PM10 24 hr 46.1 ug/m3 50.0 150.0 Good
PM2.5 24 hr 10.1 ug/m3 -- 35.0 Good
NO2 1 hr 0.026 ppm 0.180 0.100 Good
CO 1 hr 0.6 ppm 20.0 35.0 Good
CO 8 hr 0.5 ppm 9.0 9.0 Good
SO2 1 hr 0.004 ppm -- 0.075 Good
SO2 24 hr 0.003 ppm 0.040 0.140 --
Wind Speed 1 hr 7.4 mph -- -- --
Wind Direction 1 hr N direction -- -- --
BC 1 hr 1.823 ug/m3 -- -- --
BC 24 hr 0.971 ug/m3 -- -- --
Temperature 1 hr 86.6° deg F -- -- --
Relative Humidity 1 hr 75.4 % -- -- --
Rain 1 hr 0.00 in -- -- --
Rain-Daily Daily Total 0.00 in -- -- --
Rain-Monthly Monthly Total 0.00 in -- -- --
Rain-Annual Annual Total -- in -- -- --