Ashburn

Data time: 11/2/2025 5:00 PM ET

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

Air Quality Information
Pollutant	Concentration	Units of Measure
NO2	2	PPB
Ozone	39	PPB
PM10	12	UG/M3
PM2.5	4	UG/M3

Historical Data Concentration

Hour	AQI	Class	Program	Responsible Pollutant	Activity Caution	Risk Groups
17:00	2	Good	NO2	NO2	None	None
17:00	36	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
17:00	11	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
17:00	22	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
16:00	2	Good	NO2	NO2	None	None
16:00	36	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
16:00	11	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
16:00	22	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
15:00	1	Good	NO2	NO2	None	None
15:00	38	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
15:00	11	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
15:00	22	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
14:00	1	Good	NO2	NO2	None	None
14:00	37	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
14:00	11	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
14:00	22	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
13:00	2	Good	NO2	NO2	None	None
13:00	36	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
13:00	11	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
13:00	23	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
12:00	1	Good	NO2	NO2	None	None
12:00	37	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
12:00	11	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.