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Tell President Obama and the US DOT to stop oil trains carrying diluted tar sands and fracked shale oil from the Bakken formation—both are more toxic, more explosive, and more carbon-intensive than conventional crude.

Drinking Water Fact Sheet: Radon

Radon is a naturally occurring radioactive gas formed by uranium and radium in rocks and soil. Most radon seeps into the air of buildings through sump holes, floor drains, cinderblocks, dirt floors, and cracks in foundations and concrete floors. However, radon can also enter homes via the drinking water supply. Groundwater dissolves radon from uranium-containing rock, resulting in generally higher concentrations of radon in well water compared with drinking water derived from surface waters, such as rivers and lakes.

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Action Alerts

  • Tell President Obama: Ban Oil Trains

    Tell President Obama and the US DOT to stop oil trains carrying diluted tar sands and fracked shale oil from the Bakken formation—both are more toxic, more explosive, and more carbon-intensive than conventional crude.

  • Tell EPA: Public Health needs a strong Haze Rule

    The EPA must improve the Regional Haze Rule so polluters are held accountable and everyone can experience healthy air at our national parks and wilderness areas.

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In the Spotlight

  • March 25, 2016
    What now, after the Supreme Court stay?
    The Supreme Court in February 2016 issued a "stay," or a temporary suspension, of the Clean Power Plan while a lower court reviews this legal challenge. This situation raises many questions.