An official website of the United States government.

Due to a lapse in appropriations, EPA websites will not be regularly updated. In the event of an environmental emergency imminently threatening the safety of human life or where necessary to protect certain property, the EPA website will be updated with appropriate information. Please note that all information on the EPA website may not be up to date, and transactions and inquiries submitted to the EPA website may not be processed or responded to until appropriations are enacted.

We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

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.