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State tells locals to stay out of stream

Dave Moller
Senior staff writer

The state’s water agency has issued a health warning for the stream that flows from Empire Mine State Park through Memorial Park in Grass Valley.

People should avoid contact with the waters of the Magenta Drain and the sediment near it until further notice because of unsafe levels of arsenic. There is a recently-cut trail that partially follows the drain that is often used by mountain bikers and hikers.

State water officials said recent tests detected levels of arsenic that exceed safety threshold limits coming from the historic mine. Grass Valley city workers are posting warnings along the stream today.

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