California's Water Contains Potentially Toxic Materials
A study conducted by the U.S. Geological Survey found that a fifth of California's groundwater contains potentially toxic contaminants.By Leah Becerra | July 15, 2015
A study by the U.S. Geological Survey found the state's drought isn't the only water problem California residents have to deal with.
The agency's research, beginning in the early 2000s, looked at California's public water supply. It turns out one-fifth of the state's groundwater, which helps supply public water systems, contains high levels of contaminants that could be toxic. (Video via KQED)
If you live in the state, or have visited recently, you probably didn't notice the water looking any different than — say — normal drinking water. The USGS says that's because the ground acts as a natural filter, taking out any particles that can be seen with the naked eye. (Video via Dasani)