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News Release 07-064

Nitrate in Lake Superior: On the Rise

Level is inching toward making the lake water unsafe to drink

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An instrument aboard the research vessel Blue Heron is used for taking water samples of nitrate.

Split Rock Lighthouse on the north shore of Lake Superior as viewed from the deck of the research vessel Blue Heron. Scientists are taking water samples for nitrate and other substances in the lake.

Credit: Robert Sterner

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