EL CAJON LES

Data time: 9/20/2026 12:00 PM PT

Location
Address:	533 South 1st St
City:	El Cajon
Latitude:	32.789565
Longitude:	-116.944308
Region:	Inland Valley

Air Quality Information
Pollutant	Concentration	Units of Measure
SO2Hour	0.1	PPB
OzonePPM8	0.043	PPM
PM10	23.2	UG/M3
PM2.5	9.4	UG/M3
CO PPB	249.3	PPB
NO2 PPB	4.2	PPB

Hour	AQI	Class	Program	Responsible Pollutant	Activity Caution	Risk Groups
12:00	0	Good	SO2Hour	05_SO2
12:00	40	Good	OzonePPM8	01_OZONE	None	None.
12:00	21	Good	PM10	22_PM10	None	People with respiratory disease are the group most at risk.
12:00	52	Moderate	PM2.5	21_PM25	Respiratory symptoms possible in unusually sensitive individuals, possible aggravation of heart or lung disease in people with cardiopulmonary disease and older adults.	People with respiratory or heart disease, the elderly and children are the groups most at risk.
12:00	3	Good	CO PPB	06_CO	None	None.
12:00	4	Good	NO2 PPB	04_TRUE NO2	None	None
11:00	0	Good	SO2Hour	05_SO2
11:00	36	Good	OzonePPM8	01_OZONE	None	None.
11:00	21	Good	PM10	22_PM10	None	People with respiratory disease are the group most at risk.
11:00	51	Moderate	PM2.5	21_PM25	Respiratory symptoms possible in unusually sensitive individuals, possible aggravation of heart or lung disease in people with cardiopulmonary disease and older adults.	People with respiratory or heart disease, the elderly and children are the groups most at risk.
11:00	3	Good	CO PPB	06_CO	None	None.
11:00	4	Good	NO2 PPB	04_TRUE NO2	None	None
10:00	0	Good	SO2Hour	05_SO2
10:00	34	Good	OzonePPM8	01_OZONE	None	None.
10:00	21	Good	PM10	22_PM10	None	People with respiratory disease are the group most at risk.
10:00	51	Moderate	PM2.5	21_PM25	Respiratory symptoms possible in unusually sensitive individuals, possible aggravation of heart or lung disease in people with cardiopulmonary disease and older adults.	People with respiratory or heart disease, the elderly and children are the groups most at risk.
10:00	3	Good	CO PPB	06_CO	None	None.
10:00	4	Good	NO2 PPB	04_TRUE NO2	None	None
09:00	0	Good	SO2Hour	05_SO2
09:00	32	Good	OzonePPM8	01_OZONE	None	None.
09:00	21	Good	PM10	22_PM10	None	People with respiratory disease are the group most at risk.
09:00	50	Good	PM2.5	21_PM25	None	None.
09:00	2	Good	CO PPB	06_CO	None	None.
09:00	3	Good	NO2 PPB	04_TRUE NO2	None	None
08:00	0	Good	SO2Hour	05_SO2
08:00	31	Good	OzonePPM8	01_OZONE	None	None.
08:00	21	Good	PM10	22_PM10	None	People with respiratory disease are the group most at risk.
08:00	49	Good	PM2.5	21_PM25	None	None.
08:00	2	Good	CO PPB	06_CO	None	None.
08:00	3	Good	NO2 PPB	04_TRUE NO2	None	None
07:00	0	Good	SO2Hour	05_SO2
07:00	30	Good	OzonePPM8	01_OZONE	None	None.
07:00	20	Good	PM10	22_PM10	None	People with respiratory disease are the group most at risk.
07:00	48	Good	PM2.5	21_PM25	None	None.
07:00	2	Good	CO PPB	06_CO	None	None.