Great Lakes Initiative (GLI) Clearinghouse

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.

Using the GLI Clearinghouse

Download the Clearinghouse and Manual
Before You Use the GLI Clearinghouse
What Chemicals and Data Fields Are Included?
Where the Data Comes From
Contact Info for GLI States and Tribes

What Is the GLI?

hand riffling through thick set of pages

The Great Lakes Initiative
Regulations

Calculating Water Quality Criteria

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.

Great Lakes Initiative (GLI) Clearinghouse

Using the GLI Clearinghouse

What Is the GLI?

Calculating Water Quality Criteria

Related Information

Who Should Use the GLI Clearinghouse?