*Current version: 1.0.0 Last updated: 3/20/2022

• To launch the tool locally, click the green 'Code' button and download the zip file which contains the code repository. Open the app.R file in RStudio for local app deployment. RStudio will recognize the Shiny script and provide a Run App button at the top of the editor pane (look for the green play triangle).

This R Shiny app presents an easy-to-use user interface for exploring and downloading available datasets collected in the National Aquatic Resource Surveys (NARS). These data are housed at the NARS Data web page. Users have the ability to explore available datasets and the option to filter the data by state(s) of interest and join site information to selected datasets. Users of the data are encouraged to review the Technical Reports, Field and Laboratory Manuals, and metadata files to understand the types of data available and how they were collected or measured. Users are also encouraged to read and leverage the EPA survey reports developed from these data that highlight national and regional assessments.

• For NARS Data Download Tool questions, bugs, feedback, or tool modification suggestions, please contact Garrett Stillings at: [email protected].

The United States Environmental Protection Agency (EPA) GitHub project code is provided on an "as is" basis and the user assumes responsibility for its use. EPA has relinquished control of the information and no longer has responsibility to protect the integrity, confidentiality, or availability of the information. Any reference to specific commercial products, processes, or services by service mark, trademark, manufacturer, or otherwise, does not constitute or imply their endorsement, recommendation or favoring by EPA. The EPA seal and logo shall not be used in any manner to imply endorsement of any commercial product or activity by EPA or the United States Government.