Rest

Data time: 4/5/2026 9:00 PM 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	34	PPB
PM10	8	UG/M3
PM2.5	2.4	UG/M3

Historical Data Concentration

Hour	AQI	Class	Program	Responsible Pollutant	Activity Caution	Risk Groups
21:00	31	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
21:00	7	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
21:00	13	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
20:00	31	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
20:00	8	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
20:00	13	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
19:00	31	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
19:00	9	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
19:00	13	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
18:00	29	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
18:00	10	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
18:00	15	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
17:00	28	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
17:00	10	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
17:00	16	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
16:00	31	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
16:00	11	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.