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 Monitoring

During the spring and summer, EPA's research vessel, the Lake Guardian, is used to help scientists sample water, aquatic life, sediments and air. Data gathered shows trends in water quality and aquatic life. Researchers are then able to determine the overall health of the Great Lakes ecosytem. 

Latest News

EPA confirms non-native invertebrate species, Brachionus leydigii , in the Great Lakes.