Updates

10/21/2021The 2019-2021 NADP Atmospheric Integrated Research Monitoring Network (AIRMoN) data were imported into the database.

10/20/2021The 2019-2021 NADP Ammonia Monitoring Network (AMoN) data were imported into the database.

10/19/2021The 2020-2021 NADP Mercury Deposition Network (MDN) data were imported into the database.

10/15/2021The 2020 NADP National Trends Network (NTN) Annual Total Wet Deposition and Annual Precipitation-Weighted Mean Concentrations datasets were both imported into the database.

10/14/2021The Jan-Mar 2021 NADP National Trends Network (NTN) data were imported into the database.

10/13/2021The Jan-Apr 2021 EPA Chemical Speciation Network (CSN) data from AQS was imported into the database.

10/12/2021The Jan-Mar 2021 IMPROVE Nephelometer dataset update from ARS was imported into the FED database.

09/20/2021A updated set of Visibility Trends and Composition Tools was added for visualizing haze-related trends and composition from the IMPROVE network.

09/03/2021The Aug 2020 IMPROVE Aerosol dataset update from UCD was imported into the FED database.

06/29/2021The Jun-Jul 2020 IMPROVE Aerosol dataset update from UCD was imported into the FED database.

06/07/2021An updated set of Air Quality Related Values (AQRV) Express Tools was added for analyzing IMPROVE light extinction data.

05/11/2021An updated set of Raw IMPROVE Data Analysis Express Tools was added for visualizing and analyzing raw IMPROVE aerosol data.

04/22/2021An updated set of Haze Analysis Express Tools was added for visualizing and comparing IMPROVE RHR2 and Impairment data.

04/21/2021The May 2020 IMPROVE Aerosol dataset update from UCD was imported into the FED database.

04/05/2021The Apr 2020 IMPROVE Aerosol dataset update from UCD was imported into the FED database.

03/17/2021An updated set of IMPROVE Aerosol Q/A Express Tools was added for analyzing raw IMPROVE aerosol data.

01/20/2021The Feb-Mar 2020 IMPROVE Aerosol dataset update from UCD was imported into the FED database.

01/05/2021The Jul-Sep 2020 IMPROVE Nephelometer data from ARS was imported into the FED database.

09/10/2020The Dec 2019-Jan 2020 IMPROVE Aerosol dataset update from UCD was imported into the FED database.

08/14/2020The Oct-Nov 2019 IMPROVE Aerosol dataset update from UCD was imported into the FED database.

07/02/2020The Sep 2019 IMPROVE Aerosol dataset update from UCD was imported into the FED database.

06/17/2020The Jul-Aug 2019 IMPROVE Aerosol dataset update from UCD was imported into the FED database.

04/15/2020The May-Jun 2019 IMPROVE Aerosol dataset update from UCD was imported into the FED database.

03/05/2020The Jan-Apr 2019 IMPROVE Aerosol dataset update from UCD was imported into the FED database.

10/18/2019The resubmitted Jan-Dec 2018 IMPROVE Aerosol data has been imported into the TSS database.

07/30/2019A new collection of Haze Trends charts for analyzing visibility trends at IMPROVE sites on the most impaired, clearest, and all days has been published.

05/01/2019The IMPROVE substituted data developed by Air Resource Specialists (ARS) have been added to the database and the RHR2 and Impairment datasets have been updated.

03/26/2019A new series of Haze Trends charts have been published to the Haze Analysis Tools under the "Trends" tab.

02/13/2019A new series of Anthro vs. Natural charts have been published to the Haze Analysis Tools under the "Anthro vs. Natural" tabs.

01/29/2019A new feature was added to the Haze Analysis Tools map to display site markers for individual networks and datasets using different shapes, colors, and sizes. A legend was also added.

10/15/2018A new full year (2017) of IMPROVE aerosol data, RHR2, and Impairment data has been added to the database.

10/04/2018Added context-sensitive help icons, popups, and glossary definitions to the Haze Analysis Tools.

10/02/2018An Updates page has been added which can be accessed from the News menu in the top navigation bar.

10/01/2018An Air Quality Glossary has been added which can be accessed from the Help menu in the top navigation bar.

09/28/2018A Find Events tool has been added which can be accessed from the News menu in the top navigation bar.

09/27/2018A Find Sites tool has been added that allows you to find monitoring sites by various search criteria.

08/01/2018Twelve new charts have been added to the draft Haze Analysis Tool, such as monthly, seasonal, and annual charts.

07/27/2018A suite of Visibility Summary tools have been added to provide graphical chart analyses of haze composition and trends in Class I Areas.

07/26/2018A Dataset Detail tool has been added to present detailed information and metadata about available monitoring datasets.

07/05/2018A draft RHR2 vs. Impairment tool has been created to present various charts comparing extinction data by both the RHR2 and Impairment metrics.

06/05/2018A Dataset Catalog tool has been created to help end users find relevant monitoring datasets based on a number of search criteria.