Hoping to better understand the health effects of oil fracking, the state in 2013 ordered oil companies to test the chemical-laden waste water extracted from wells. Data culled from the first year ...

That smell may be an indication of poor water quality. Regularly checking free, combined and total chlorine levels will help to prevent or reveal water quality issues before problems arise.

These high levels of metals were associated with the water they consumed and bathed in, particularly in the case of mercury, which can be absorbed dermally. O'Callaghan said, "Crude oil can ...