Updates

04/13/2020 COVID-19 Update: Although development and operations are now being conducted according to the relevant social-distancing guidelines, work continues unabated on the TSS database and website with no significant impacts to progress.

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

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

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

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

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

01/29/2019 A 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.

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

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

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

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

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

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

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

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

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

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

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