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IMPROVE Aerosol Data
The raw IMPROVE aerosol data available in a variety of ASCII files. The data from each IMPROVE monitoring site is also available as an ASCII text file, and can be accessed through the links on the left-hand side of the table below that are labeled "Click Here".
Dataset Description
Latest IMPROVE Aerosol Data These data have passed the Level 0 and Level 1 quality assurance and control procedure conducted by the Crocker Nuclear Laboratory at UC Davis, but have not been QA'ed by the States, Tribes, FLM’s or CIRA.
IMPROVE Network Metadata
 		Monitoring site information including site location, history, pictures, and air quality variables samples.
Location Table Fixed format ASCII table containing monitoring site location data.
Variable Table Fixed format ASCII file with descriptions of IMPROVE measurement parameters including variable abbreviations and units definitions.  Note, some of the variable names have recently changed.  The old variable table can be found here.
Flag Table Fixed format ASCII table containing IMPROVE aerosol data flags.
Calculated Variables Fixed format ASCII table containing descriptions of calculated variables.
Entire IMPROVE Dataset Entire IMPROVE Dataset in a single file (Size: 30 MB, or 150 MB uncompressed)
IMPROVE FTP Site The FTP site where the IMPROVE ASCII data files are stored.

Download data for each IMPROVE monitoring site below.
(Click on ASCII Data column to retrieve data.  Click on column header to sort the table.)

ASCII FilesStateCodeNameLocationCountyStart_DateEnd_DateAgencySponsor
Click HereALSIPS1Sipsy WildernessBlack Warrior work center, 4 mi. N of Grayson, AL, Moulton work area, Alabama National ForestWinston County03/07/1992  U.S. Forest Service (USFS)USFS
Click HereAKSIME1Simeonof Aleutians East Borough09/10/2001  U.S. Fish and Wildlife Service (FWS)FWS
Click HereAKDENA1Denali NPPark Headquarters near water tankDenali Borough03/02/1988  U.S. National Park Service (NPS)NPS
Click HereAKTUXE1Tuxedni Kenai Peninsula Borough12/18/2001  U.S. Fish and Wildlife Service (FWS)FWS
Click HereAKTRCR1Trapper Creek Matanuska-Susitna Borough09/10/2001  U.S. National Park Service (NPS)NPS
Click HereAZBALD1Mount Baldy Apache County02/29/2000  U.S. Forest Service (USFS)USFS
Click HereAZCHIR1Chiricahua NMEntrance StationCochise County03/02/1988  U.S. National Park Service (NPS)NPS
Click HereAZINGA1Indian GardensIndian Gardens picnic area, Grand Canyon NP, Ranger StationCoconino County10/04/1989  U.S. National Park Service (NPS)NPS
Click HereAZGRCA1Hopi Point #1Hopi Point Fire TowerCoconino County03/02/1988 08/29/1998 U.S. National Park Service (NPS) 
Click HereAZSYCA1Sycamore Canyon~10 mi S of Parks, AZ, 75 yards south of residenceCoconino County09/11/1991  U.S. Forest Service (USFS)USFS
Click HereAZGRCA2Hance Camp at Grand Canyon NP200 yds S of East Rim Drive, 1.2 miles S of Grandview Point turnoffCoconino County09/24/1997  U.S. National Park Service (NPS) 
Click HereAZTONT1Tonto NMNext to maintenance buildingGila County04/23/1988  U.S. Forest Service (USFS)NPS
Click HereAZSIAN1Sierra Ancha Gila County02/10/2000