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Dedicated to reducing Regional Haze in Class I Areas through the exchange of
Data, Tools, and Ideas

 
The Visibility Information Exchange Web System (VIEWS) is an online exchange of air quality data, research, and ideas designed to understand the effects of air pollution on visibility and to support the Regional Haze Rule enacted by the U.S. Environmental Protection Agency (EPA) to reduce regional haze and improve visibility in national parks and wilderness areas.
Visitor's Guide
▪The black navigation bar near the top of each page contains links to general site services.
▪The navigation area to the left of each page contains links to data resources and tools.
▪The Dataset Inventory table at the bottom of this page contains a list of available datasets.
▪The best method for accessing all available raw data is to use the Database Query Wizard.
▪The best method for viewing RHR IMPROVE data is to use the Annual Summary tools.
Regional Haze SIP Writers
▪State and Tribal Implementation Plan (SIP/TIP) writers can find IMPROVE monitoring data products catered to Regional Haze Rule (RHR) planning in the VIEWS Annual Summary.  Specific products such as 2000-2004 baseline values, natural conditions estimates, and glide slopes are available on the Annual Summary Trends page.  Please feel free to contact us with questions/comments regarding these tools!
▪ Note to SIP writers regarding the new IMPROVE algorithm and natural condition estimates; currently natural condition estimates are only available from VIEWS as calculated by the old IMPROVE algorithm.  Application of the new IMPROVE algorithm to natural visibility estimates is currently under review by the RPO Monitoring and Data analysis work group (see the 7/21/2006 presentation below).

What's New:

▪ 9/4/2007 - A comprehensive list of the datasets available on VIEWS is being developed. When complete, these Dataset Descriptions will contain complete information on each individual dataset, including the parameters measured, the geographical extent, the frequency and duration of observations, the sampling and analysis methods used, and how to find and access the data on the VIEWS website. An incomplete, draft version of the index can be found here.
▪ 4/12/2007 - ** Important FTP Site Information **
Due to problems with unauthorized access we can no longer allow anonymous access to our public FTP site. From now on, you will be prompted to login when accessing FTP resources, so please use the following information to do so: Username: cira\guest, Password: orion.  Thank you!
▪ 10/24/2006 - Final summary of the Sept 26-28 IMPROVE Steering Committee meeting Meeting Summary
▪ 08/29/2006 - BOWA1 substituted data added to VIEWS.  See the Substitute data page in the VIEWS Documents section for details of data issues at BOWA1 and other sites with data completeness issues for the 2000-2004 baseline period.
▪ 07/21/2006 - Monitoring and Data analysis workgroup presentation on revised natural condition estimates using the new IMPROVE algorithm. Supporting tables New Algorithm Old and New Algorithm
▪ 03/09/2006 - 2004 IMPROVE Calculated variables and Regional Haze data derived from the New IMPROVE Algorithm (Select Program IRHR2 from the VIEWS tools)
▪ 12/12/2005 - 2004 Regional Haze data and annual metrics using the Old IMPROVE algorithm (Select Program IRHR1 from the VIEWS tools)
▪New Database Query Wizard (with saved queries)
▪New Account Services (profile, retrieve queries)

Features and Highlights:

▪Regional Haze Guidance Documents
▪Class I Area Webcams
▪Air Quality Photographs
▪Metadata Browser
▪Monitoring Site Browser
  Always check the Current Dataset Inventory table for any recent data updates.  
Current Dataset Inventory
ProgramFreqStartEndRecordsUpdated
AQS Fine Mass FRM (D)Daily01/01/199912/31/200379831704/13/2004
AQS Fine Mass FRM (H)Hourly01/01/199912/31/2003702802304/13/2004
AQS Fine Speciation (D)Daily02/09/200012/31/2006683957605/24/2007
AQS PM10 - DailyDaily01/01/199412/31/2003112149707/30/2004
CASTNet Dry Chemistry Weekly01/06/198703/23/2005 79329011/23/2005
CASTNet Visibility ChemistryDaily10/25/199312/27/200116695003/11/2004
GAViMDaily05/31/199401/07/200165366
IMPROVE Aerosol (Preliminary)Daily8/1/20062/26/2007 66049208/31/2007
IMPROVE Aerosol (Raw)Daily03/02/1988 7/31/2006 1080485208/31/2007
IMPROVE Coarse Mass Speciation StudyDaily03/01/200307/29/2003444
IMPROVE NephelometerHourly01/01/199306/30/20071383974410/09/2007
IMPROVE Aerosol (RHR1)Daily01/01/1988 12/31/2004 722063412/12/2005
IMPROVE Aerosol (RHR2) (New Algorithm)Daily01/01/1988 12/31/2005 4861358 03/09/2006
MOHAVEDaily01/10/199209/02/1992106484
NADP/AIRMoNWeekly09/23/199202/15/200428150506/04/2004
NADP/Mercury Deposition Network (MDN)Weekly11/22/199509/28/200410982003/30/2005
NADP/Nation Trends Network (NTN)Weekly07/05/197802/03/20044824603
Navaho Generating Station (NGS)Daily03/04/199205/30/199270104/02/2004
NPS SFU AerosolDaily07/27/197911/13/199385012603/02/2004
PREVENTDaily06/21/199009/03/199058547
REVEALDaily04/20/199406/17/1995961804/02/2004
SEARCH All VariablesDaily05/01/19983/31/200543865002/13/2006
SEARCH Best EstimateDaily05/01/19983/31/200515341602/13/2006
SEARCH FRMDaily05/01/19983/31/200515339202/13/2006
SEAVSDaily07/15/199508/25/19953564
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