Ashburn

Data time: 2/10/2026 11:00 AM ET

Location
Address:	Broad Run High School
Latitude:	39.02473
Longitude:	-77.48925
Region:	Northern

Air Quality Information
Pollutant	Concentration	Units of Measure
NO2	20	PPB
Ozone	25	PPB
PM10	18	UG/M3
PM2.5	11.7	UG/M3

Historical Data Concentration

Hour	AQI	Class	Program	Responsible Pollutant	Activity Caution	Risk Groups
11:00	19	Good	NO2	NO2	None	None
11:00	23	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
11:00	17	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
11:00	56	Moderate	PM2.5	PM2.5	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	16	Good	NO2	NO2	None	None
10:00	23	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
10:00	17	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
10:00	56	Moderate	PM2.5	PM2.5	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	23	Good	NO2	NO2	None	None
09:00	15	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
09:00	17	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
09:00	59	Moderate	PM2.5	PM2.5	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	27	Good	NO2	NO2	None	None
08:00	8	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
08:00	17	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
08:00	58	Moderate	PM2.5	PM2.5	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.
07:00	31	Good	NO2	NO2	None	None
07:00	5	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
07:00	16	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
07:00	52	Moderate	PM2.5	PM2.5	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.
06:00	28	Good	NO2	NO2	None	None
06:00	14	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
06:00	16	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.