Rest

Data time: 5/28/2026 1:00 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	25	PPB
PM10	14	UG/M3
PM2.5	4.7	UG/M3

Historical Data Concentration

Hour	AQI	Class	Program	Responsible Pollutant	Activity Caution	Risk Groups
01:00	23	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
01:00	13	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
01:00	26	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
00:00	20	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
00:00	13	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
00:00	26	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
23:00	13	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
22:00	13	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
21:00	13	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
20:00	19	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.