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Rockingham Co.

Data time: 7/21/2026 6:00 AM ET

Location
Address:	Harrisonburg VDOT
Latitude:	38.47753
Longitude:	-78.80952
Region:	Valley

Air Quality Information
Pollutant	Concentration	Units of Measure
SO2	0	PPB
NO2	4	PPB
Ozone	21	PPB
PM10	29	UG/M3
PM2.5	8.3	UG/M3

Historical Data Concentration

Hour	AQI	Class	Program	Responsible Pollutant	Activity Caution	Risk Groups
06:00	0	Good	SO2	SO2
06:00	4	Good	NO2	NO2	None	None
06:00	19	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
06:00	27	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
06:00	46	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
05:00	0	Good	SO2	SO2
05:00	4	Good	NO2	NO2	None	None
05:00	20	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
05:00	28	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
05:00	51	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.
04:00	0	Good	SO2	SO2
04:00	2	Good	NO2	NO2	None	None
04:00	23	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
04:00	29	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
04:00	53	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.
03:00	0	Good	SO2	SO2
03:00	3	Good	NO2	NO2	None	None
03:00	23	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
03:00	30	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
03:00	56	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.
02:00	0	Good	SO2	SO2
02:00	2	Good	NO2	NO2	None	None
02:00	24	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
02:00	31	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
02:00	58	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.
01:00	0	Good	SO2	SO2
01:00	2	Good	NO2	NO2	None	None
01:00	21	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
01:00	31	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.