Ashburn

Data time: 10/29/2025 7:00 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	9	PPB
Ozone	7	PPB
PM10	8	UG/M3
PM2.5	3.6	UG/M3

Historical Data Concentration

Hour	AQI	Class	Program	Responsible Pollutant	Activity Caution	Risk Groups
07:00	8	Good	NO2	NO2	None	None
07:00	6	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
07:00	7	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
07:00	20	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
06:00	9	Good	NO2	NO2	None	None
06:00	6	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
06:00	7	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
06:00	18	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
05:00	8	Good	NO2	NO2	None	None
05:00	8	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
05:00	7	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
05:00	18	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
04:00	6	Good	NO2	NO2	None	None
04:00	11	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
04:00	7	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
04:00	17	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
03:00	5	Good	NO2	NO2	None	None
03:00	13	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
03:00	7	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
03:00	17	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
02:00	4	Good	NO2	NO2	None	None
02:00	8	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
02:00	8	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.