Ashburn

Data time: 8/13/2026 12:00 AM ET

Hour	AQI	Class	Program	Responsible Pollutant	Activity Caution	Risk Groups
00:00	2	Good	NO2	NO2	None	None
00:00	33	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
00:00	19	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
00:00	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.
23:00	2	Good	NO2	NO2	None	None
23:00	19	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
22:00	1	Good	NO2	NO2	None	None
22:00	19	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
21:00	1	Good	NO2	NO2	None	None
21:00	19	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
20:00	2	Good	NO2	NO2	None	None
20:00	19	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
19:00	2	Good	NO2	NO2	None	None
19:00	34	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.