Data from the National Aquatic Resource Surveys
To download the data: The following data are available for download as comma separated values (.csv) files. Sort the table below using the pull down menus or headers to more easily locate the data for a specific survey or indicator type. Right click on the file name and select Save Link As to save the file to your computer. Make sure to also download the companion metadata file (.txt) for the list of field labels.
Data can also be downloaded using the NARS Data Download Tool.
- Click here for recommended Data Citations
- Site information files available for each survey contain locational data for the sites. The locational data can be linked to the other data files using UID and/or Unique ID fields.
Click here to view a summary of the available data for each of the surveys including a cross walk between unique site identifiers and individual survey site ids.
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.
Recently added:
NWCA 2021 data files