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The researchers found that, even years later, the tissue and shells of mussels contained radium that could be traced to wastewater from fracking in the Marcellus Shale.

The system can be adapted to detect other similar contaminants in water, including cadmium, copper, lithium, barium, cesium, and radium, Ranno says.

Radon is a naturally occurring radioactive gas produced when metals like uranium or radium break down in rocks and soil.

Curie used the building for some of her pioneering work on radioactivity and later became the first woman to win a Nobel Prize, for discovering polonium and radium.

Contamination largely consists of low levels of uranium, thorium, radium and associated decay products.