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Great Lakes Initiative (GLI) Clearinghouse

  • Protecting the Great Lakes

    The GLI Clearinghouse is a central resource for developing water quality standards in the Great Lakes watershed.

The GLI Clearinghouse is a central resource for developing water quality standards in the Great Lakes watershed. It contains information on criteria, toxicity data, exposure parameters and other supporting documents. It can be used to help establish water quality criteria, permit discharge limits, Total Maximum Daily Loads, Remedial Action Plans and Lakewide Management Plans.

The Great Lakes Initiative

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  • The Great Lakes Initiative
  • Regulations

Using the GLI Clearinghouse

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  • Download and Install the Clearinghouse
  • Before You Use the GLI Clearinghouse
  • Chemicals and Data Fields
  • Where the Data Comes From
  • Contact Info for GLI States and Tribes

Calculating Water Quality Criteria

Tools and Resources
  • Criteria Calculation Spreadsheets
  • Technical Support for Regulations

Who Should Use the GLI Clearinghouse?

In particular, States and Tribes can use the Clearinghouse to help derive criteria for pollutants without specific numeric criteria published in 40 CFR Part 132 of the GLI.

The target audience for the Clearinghouse is State and Tribal environmental agencies in the Great Lakes basin, as well as other interested parties with a technical background.

Related Information

  • 40 CFR Part 132 of the GLI
  • Standards for Water Body Health
  • Water Quality Standards: Regulations and Resources
  • Water Quality Criteria
  • Total Maximum Daily Loads
  • National Pollutant Discharge Elimination System (NPDES)
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on April 22, 2025
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