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Great Lakes Environmental Database (GLENDA)

Metadata Updated: March 16, 2024

The Great Lakes Environmental Database (GLENDA) houses environmental data collected by EPA Great Lakes National Program Office (GLNPO) programs that sample water, aquatic life, sediments, and air to assess the health of the Great Lakes ecosystem. GLENDA is available to the public on the EPA Central Data Exchange (CDX). A CDX account is required, which anyone may create. GLENDA offers “Ready to Download Data Files” prepared by GLNPO or a “Query Data” interface that allows users to select from predefined parameters to create a customized query. Query results can be downloaded in .csv format. GLNPO programs providing data in GLENDA include the Great Lakes Water Quality Survey and Great Lakes Biology Monitoring Program (1983-present, biannual monitoring throughout the Great Lakes to assess water quality, chemical, nutrient, and physical parameters, and biota such as plankton and benthic invertebrates), the Great Lakes Fish Monitoring and Surveillance Program (1977-present, annual analysis of top predator fish composites to assess historic and emerging persistent, bioaccumulative, or toxic chemical contaminants), the Cooperative Science and Monitoring Initiative (2002-present, intensive water quality and biology sampling of one lake per year focusing on key challenges and data gaps), the Great Lakes Integrated Atmospheric Deposition Network (1990-present, monitoring Great Lakes air and precipitation for persistent toxic chemicals), the Lake Michigan Mass Balance Study (1993-1996, analyzed the atmosphere, tributaries, sediments, water column, and biota of Lake Michigan for nutrients, atrazine, PCBs, trans-nonachlor, and mercury modelling), and the Great Lakes Legacy Act (1996-present, evaluations of sediment contamination in Areas of Concern). GLENDA is updated frequently with new data.

Access & Use Information

Public: This dataset is intended for public access and use. License: See this page for license information.

Downloads & Resources

References

https://www.epa.gov/great-lakes-monitoring/water-chemistry
https://www.epa.gov/great-lakes-legacy-act
https://www.epa.gov/greatlakes/lake-michigan-mass-balance-results-and-publications

Dates

Metadata Created Date December 4, 2020
Metadata Updated Date March 16, 2024
Data Update Frequency irregular

Metadata Source

Harvested from Region 5 Non-Geo Records

Additional Metadata

Resource Type Dataset
Metadata Created Date December 4, 2020
Metadata Updated Date March 16, 2024
Publisher U.S. Environmental Protection Agency, Region 5
Maintainer
Identifier C07E58C3-634A-4F65-98AC-8100A3E1455A
Data First Published 2019-09-20
Language en-US
Data Last Modified 2019-09-20
Public Access Level public
Data Update Frequency irregular
Bureau Code 020:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://edg.epa.gov/data/Public/R5/R5.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 1a8d96e5-2cdc-409a-a18f-4b119fc35910
Harvest Source Id 843484e3-2f5d-4fc2-91ab-ca21e5f1a05e
Harvest Source Title Region 5 Non-Geo Records
Homepage URL https://www.epa.gov/great-lakes-monitoring
License https://edg.epa.gov/EPA_Data_License.html
Old Spatial -92.4942,40.0525,-75.3514,48.7248
Program Code 020:072
Related Documents https://www.epa.gov/great-lakes-monitoring/water-chemistry, https://www.epa.gov/great-lakes-legacy-act, https://www.epa.gov/greatlakes/lake-michigan-mass-balance-results-and-publications
Source Datajson Identifier True
Source Hash 2a222c39b064e66cbfcde0e62f67fcee85cdb73a03e8ecdd3039019cfb6f042b
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -92.4942, 40.0525, -92.4942, 48.7248, -75.3514, 48.7248, -75.3514, 40.0525, -92.4942, 40.0525}
Temporal 1977/2019

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