Rest

Data time: 7/23/2026 8:00 AM ET

Monitoring Site

Location
Address:	Frederick Co. Public School Maintenance Dept.
Latitude:	39.28101
Longitude:	-78.08157
Region:	Valley

Air Quality Information
Pollutant	Concentration	Units of Measure
Ozone	31	PPB
PM10	12	UG/M3
PM2.5	3.4	UG/M3

Historical Data Concentration

Hour	AQI	Class	Program	Responsible Pollutant	Activity Caution	Risk Groups
08:00	29	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
08:00	11	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
08:00	19	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
07:00	20	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
07:00	11	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
07:00	19	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
06:00	14	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
06:00	12	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
06:00	19	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
05:00	11	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
05:00	12	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
05:00	20	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
04:00	16	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
04:00	12	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
04:00	21	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
03:00	19	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
03:00	13	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.