Water Well Worries

In this photo taken in September 2017, Sandy Wynn-Stelt, of Belmont, Mich., stands in a wooded area near her home where industrial wastes containing PFAS chemicals were dumped for many years. High levels of the toxic compounds later were detected in drinking water from her well. While estimates vary, studies say roughly 53 million U.S. residents rely on private wells. While many provide safe water, experts say some are vulnerable to contamination from bacteria or other impurities from floodwaters or from groundwater tainted with PFAS or other pollutants. (Nic Antaya/The Grand Rapids Press via AP) MANDATORY CREDIT

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