Rest

Data time: 8/20/2026 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	22	PPB
PM10	16	UG/M3
PM2.5	8.4	UG/M3

Historical Data Concentration

Hour	AQI	Class	Program	Responsible Pollutant	Activity Caution	Risk Groups
08:00	20	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	47	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
07:00	1	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
07:00	16	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
07:00	47	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
06:00	1	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
06:00	17	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
06:00	47	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	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
05:00	17	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
05:00	47	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
04:00	0	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
04:00	17	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
04:00	47	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
03:00	4	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
03:00	17	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.