![A scuba diver taking a sample from the bottom of a lake](/sites/default/files/styles/embedded_landscape/public/2023-02/Mussel%20Watch%20Diver%20at%20work.jpg?itok=ANTrycLg)
A diver takes samples as part of a seven-week sampling mission to determine the amount of contamination in the Great Lakes.
Credit: NOAA
A diver takes samples as part of a seven-week sampling mission to determine the amount of contamination in the Great Lakes.
Credit: NOAA