Drinking water that is contaminated with arsenic may lead to heart problems in young adults.
Researchers collected urine samples from over 1,300 healthy adults living in areas that rely on well water.
Those exposed to arsenic were 47-percent more likely to have a thickening of the left ventricle which is the heart’s main pumping chamber.
Experts say that thickening could increase the risk for future heart problems.
About two million Americans are estimated to be drinking from wells that have high concentrations of arsenic.
Scientists say it is important to test your water for arsenic if you use a private well.