Ashburn

Data time: 11/16/2025 6:00 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	1	PPB
Ozone	38	PPB
PM10	13	UG/M3
PM2.5	2.6	UG/M3

Historical Data Concentration

Hour	AQI	Class	Program	Responsible Pollutant	Activity Caution	Risk Groups
18:00	1	Good	NO2	NO2	None	None
18:00	35	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
18:00	12	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
18:00	14	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
17:00	0	Good	NO2	NO2	None	None
17:00	35	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
17:00	13	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
17:00	15	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
16:00	0	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	13	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
16:00	16	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
15:00	0	Good	NO2	NO2	None	None
15:00	36	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
15:00	14	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
15:00	16	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
14:00	0	Good	NO2	NO2	None	None
14:00	35	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
14:00	14	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
14:00	16	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
13:00	0	Good	NO2	NO2	None	None
13:00	35	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
13:00	14	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.