Ashburn

Data time: 5/11/2026 11:00 AM ET

Hour	AQI	Class	Program	Responsible Pollutant	Activity Caution	Risk Groups
11:00	6	Good	NO2	NO2	None	None
11:00	23	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
11:00	17	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
10:00	5	Good	NO2	NO2	None	None
10:00	22	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
10:00	15	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
09:00	7	Good	NO2	NO2	None	None
09:00	20	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
09:00	15	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
08:00	8	Good	NO2	NO2	None	None
08:00	22	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
08:00	14	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
07:00	6	Good	NO2	NO2	None	None
07:00	27	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
07:00	12	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
06:00	4	Good	NO2	NO2	None	None
06:00	22	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.