More than 1.3 million Californians may be drinking high levels of manganese, enough to cause cognitive disabilities in children and Parkinson's-like symptoms in adults.The discovery was made by researchers at the University of - Riverside (UCR), who discovered the mineral is thriving in untreated wells throughout Central Valley. The study inspected private wells and public water systems - with nearly half of the affected residents living in disadvantaged communities - and found that almost 89 percent are likely to access water highly contaminated with manganese.
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