SAN YSIDRO

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

Location
Address:	198 W. San Ysidro Blvd
City:	San Diego
Latitude:	32.552824
Longitude:	-117.047345
Region:	Coastal

Air Quality Information
Pollutant	Concentration	Units of Measure
CO	0.3	PPM
PM10	32.1	UG/M3
PM2.5	12	UG/M3
NO2 PPB	4.5	PPB

Hour	AQI	Class	Program	Responsible Pollutant	Activity Caution	Risk Groups
12:00	3	Good	CO	06_CO	None	None.
12:00	30	Good	PM10	22_PM10	None	People with respiratory disease are the group most at risk.
12:00	56	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	4	Good	NO2 PPB	04_TRUE NO2	None	None
11:00	2	Good	CO	06_CO	None	None.
11:00	30	Good	PM10	22_PM10	None	People with respiratory disease are the group most at risk.
11:00	56	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	NO2 PPB	04_TRUE NO2	None	None
10:00	2	Good	CO	06_CO	None	None.
10:00	29	Good	PM10	22_PM10	None	People with respiratory disease are the group most at risk.
10:00	56	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	4	Good	NO2 PPB	04_TRUE NO2	None	None
09:00	3	Good	CO	06_CO	None	None.
09:00	29	Good	PM10	22_PM10	None	People with respiratory disease are the group most at risk.
09:00	56	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.
09:00	5	Good	NO2 PPB	04_TRUE NO2	None	None
08:00	3	Good	CO	06_CO	None	None.
08:00	29	Good	PM10	22_PM10	None	People with respiratory disease are the group most at risk.
08:00	56	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.
08:00	8	Good	NO2 PPB	04_TRUE NO2	None	None
07:00	3	Good	CO	06_CO	None	None.
07:00	28	Good	PM10	22_PM10	None	People with respiratory disease are the group most at risk.
07:00	55	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.