Historical Data
Year:
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
2000
1999
1998
1997
1996
1995
1994
1993
Month:
January
February
March
April
May
June
July
August
September
October
November
December
Site:
All Sites
---------
Metro Washington
Metro Baltimore
Western Maryland
Eastern Shore
---------
Aldino
Alexandria Health
Annandale
Ashburn
Aurora Hills
Bald Eagle Recreation Center
Beltsville
Blackwater NWR
Calvert
Cub Run
Davidsonville
DCNearRoad
Edgewood
Essex
Fair Hill
Franconia
Frederick Airport
Furley
Glen Burnie
Hagerstown
Horn Point
HU-Beltsville
James S. Long Park
King Greenleaf Rec Center
Lake Montebello
Lewinsville
McMillan Reservoir
Millington
MT Vernon
Oldtown
Padonia
PG Equestrian Center
Piney Run
River Terrace
Rockville
South Carroll
Southern Maryland
Springfield
Takoma Rec
Pollutant:
Maximum AQI
Ozone
Particulate Matter
Sun
Mon
Tue
Wed
Thu
Fri
Sat
01
AQI:38
details
02
AQI:54
details
03
AQI:47
details
04
AQI:57
details
05
AQI:50
details
06
AQI:72
details
07
AQI:77
details
08
AQI:52
details
09
AQI:33
details
10
AQI:53
details
11
AQI:33
details
12
AQI:41
details
13
AQI:64
details
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31