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| Type: | Resource | |
| Storage: | The size of this resource is 890.4 MB | |
| Created: | Apr 29, 2025 at 5:35 p.m. | |
| Last updated: | Apr 29, 2025 at 6:56 p.m. | |
| Citation: | See how to cite this resource | |
| Content types: | Single File Content |
| Sharing Status: | Public |
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Abstract
This data product is an archived clone as of 29 April 2025 of the U.S. Environmental Protection Agency’s (EPA) National Aquatic Resource Surveys (NARS) program, capturing all publicly available datasets, technical reports, field and laboratory manuals, and associated metadata. The NARS program conducts nationwide surveys of the condition of the United States’ rivers, streams, lakes, coastal waters, and wetlands. This clone includes data from the National Rivers and Streams Assessment (NRSA), the National Lakes Assessment (NLA), the National Coastal Condition Assessment (NCCA), the Wadeable Streams Assessment (WSA), and the National Wetland Condition Assessment (NWCA)—as well as methodological documentation supporting field and analytical protocols. The archive preserves original file structures and naming conventions from the EPA’s releases, including a copy of the web table associating each data file with its associated metadata file. This dataset is intended for users seeking a complete reproducible copy of the NARS data ecosystem for scientific analysis, educational purposes, or environmental monitoring.
Subject Keywords
Coverage
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Content
README.txt
Clone of the EPA National Aquatic Resource Surveys (NARS) Date: 29 April 2025 Description: This is a clone of the data files, metadata, technical documents and reports from the EPA National Aquatic Resource Surveys (NARS) website. Citation: U.S. Environmental Protection Agency. 2025. National Aquatic Resource Surveys. (data and metadata files). Available from U.S. EPA website: http://www.epa.gov/national-aquatic-resource-surveys/data-national-aquatic-resource-surveys. Date accessed: 2025-04-29. Files included: NARS_Data_Metadata_Table.csv - A CSV version of the web table on the NARS website for each sampling program and year associating data tables with their metadata files. Please see these files for individual variable naming and descriptions. nars_all_data_Apr2025.zip - A compressed folder of all data and metadata files downloadable from the NARS website at the time of cloning. nars_all_docs_Apr2025.zip - A compressed folder of all technical reports, documents, and assessments downloadable from the NARS website at the time of cloning.
Related Resources
| The content of this resource references | U.S. Environmental Protection Agency. 2025. National Aquatic Resource Surveys. (data and metadata files). Available from U.S. EPA website: http://www.epa.gov/national-aquatic-resource-surveys/data-national-aquatic-resource-surveys. Date accessed: 2025-04-29. |
Credits
Funding Agencies
This resource was created using funding from the following sources:
| Agency Name | Award Title | Award Number |
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| Environmental Protection Agency |
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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