Blair Street

Data time: 9/25/2026 8:00 AM CST

Monitoring Site

Location

Address:: 3247 Blair Ave.
City:: St. Louis
Latitude:: 38.6563987731934
Longitude:: -90.1984481811523
Region:: St. Louis

Air Quality Information
Pollutant	Concentration	Units of Measure
8hr-CO	0.3	PPM
CO	0.3	PPM
NO2	9.2	PPB
8hr-O3	0.011	PPM
PM10	22	ug/m3
PM2.5	4.5	ug/m3
SO2	0.7	PPB

https://dnr.mo.gov/air/hows-air/monitoring/sites/blair-street-st-louis-city

Hour	AQI	Class	Program	Responsible Pollutant	Activity Caution	Risk Groups
08:00	3	Good	8hr-CO	8hr-CO	None	None
08:00	3	Good	CO	COTRACE	None	None
08:00	9	Good	NO2	NO2_Direct	None	None
08:00	10	Good	8hr-O3	O3P	None	None
08:00	20	Good	PM10	640X_PM-10_STD	None	None
08:00	25	Good	PM2.5	PM25FEM	None	None
08:00	1	Good	SO2	SO2_T	None	None
07:00	3	Good	8hr-CO	8hr-CO	None	None
07:00	3	Good	CO	COTRACE	None	None
07:00	9	Good	NO2	NO2_Direct	None	None
07:00	7	Good	8hr-O3	O3P	None	None
07:00	19	Good	PM10	640X_PM-10_STD	None	None
07:00	24	Good	PM2.5	PM25FEM	None	None
07:00	1	Good	SO2	SO2_T	None	None
06:00	3	Good	8hr-CO	8hr-CO	None	None
06:00	3	Good	CO	COTRACE	None	None
06:00	9	Good	NO2	NO2_Direct	None	None
06:00	6	Good	8hr-O3	O3P	None	None
06:00	19	Good	PM10	640X_PM-10_STD	None	None
06:00	23	Good	PM2.5	PM25FEM	None	None
06:00	1	Good	SO2	SO2_T	None	None
05:00	3	Good	8hr-CO	8hr-CO	None	None
05:00	3	Good	CO	COTRACE	None	None
05:00	11	Good	NO2	NO2_Direct	None	None
05:00	5	Good	8hr-O3	O3P	None	None
05:00	19	Good	PM10	640X_PM-10_STD	None	None
05:00	22	Good	PM2.5	PM25FEM	None	None
05:00	1	Good	SO2	SO2_T	None	None
04:00	3	Good	8hr-CO	8hr-CO	None	None
04:00	3	Good	CO	COTRACE	None	None
04:00	13	Good	NO2	NO2_Direct	None	None
04:00	5	Good	8hr-O3	O3P	None	None
04:00	19	Good	PM10	640X_PM-10_STD	None	None
04:00	21	Good	PM2.5	PM25FEM	None	None
04:00	1	Good	SO2	SO2_T	None	None
03:00	3	Good	8hr-CO	8hr-CO	None	None
03:00	3	Good	CO	COTRACE	None	None
03:00	13	Good	NO2	NO2_Direct	None	None
03:00	4	Good	8hr-O3	O3P	None	None
03:00	19	Good	PM10	640X_PM-10_STD	None	None
03:00	19	Good	PM2.5	PM25FEM	None	None