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Data time: 11/7/2025 11:00 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	36	PPB
PM10	19	UG/M3
PM2.5	7.7	UG/M3

Historical Data Concentration

Hour	AQI	Class	Program	Responsible Pollutant	Activity Caution	Risk Groups
11:00	33	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
11:00	18	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
11:00	43	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
10:00	28	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
10:00	17	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
10:00	40	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
09:00	22	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
09:00	16	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
09:00	40	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
08:00	0	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
08:00	15	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
08:00	42	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
07:00	0	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
07:00	14	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
07:00	42	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
06:00	0	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.