Article: VIRUSES FOUND IN MADISON WELLS BUT THREAT TO HUMANS ISN'T CONSIDERED GREAT BECAUSE MADISON CHLORINATES ITS WATER.(FRONT)

Byline: RON SEELY rseely@madison.com 608-252-6131

Human viruses are probably present in most of Madison's drinking water wells and sometimes are infectious enough to cause illness were the city not treating its water with chlorine, according to research released last week.

The study was conducted by researchers from the Wisconsin Geological and Natural History Survey and Marshfield Clinic. It was a more complete follow-up to an earlier study by Mark Borchardt, a researcher at Marshfield Clinic. In that research, Borchardt found viruses in two of three wells he tested.

But this study was much more extensive and tested six of the city's wells every month between ...

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