Ashburn

Data time: 12/18/2025 6:00 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	23	PPB
Ozone	0	PPB
PM10	17	UG/M3
PM2.5	7.1	UG/M3

Historical Data Concentration

Hour	AQI	Class	Program	Responsible Pollutant	Activity Caution	Risk Groups
06:00	22	Good	NO2	NO2	None	None
06:00	0	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.
06:00	39	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
05:00	22	Good	NO2	NO2	None	None
05:00	0	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
05:00	16	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
05:00	40	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
04:00	22	Good	NO2	NO2	None	None
04:00	0	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
04:00	16	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
04:00	41	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
03:00	22	Good	NO2	NO2	None	None
03:00	0	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
03:00	17	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
03:00	42	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
02:00	21	Good	NO2	NO2	None	None
02:00	0	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
02:00	17	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
02:00	42	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
01:00	0	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
01:00	17	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.