Wisconsin Ag Connection - Spring Snowmelt, Rain Can Contaminate Private Wells

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Spring Snowmelt, Rain Can Contaminate Private Wells
Wisconsin Ag Connection - 03/19/2014

As spring approaches, warming temperatures, snow melt, residual frozen ground and rain events all create conditions that can affect private wells and drinking water. According to the Wisconsin Department of Natural Resources, flood waters and runoff contain bacteria and other contaminants that can affect water supplies and cause water-borne illness. Wells located in pits, basements and low-lying areas are especially susceptible to contamination. Even without obvious signs of flooding, a well can become contaminated.

"Now is the time of year for well owners to watch for signs of flooding and to notice any change in the color, smell or taste of their drinking water," said Liesa Lehmann, private water section chief for the DNR.

Lehmann says any water supply system that has been submerged by flood waters should be pumped out once the floodwater recedes, then thoroughly disinfected and tested to determine that the water is safe.

Well owners are encouraged to test their wells annually for bacteria and nitrates, to check for problems and ensure the water is safe to drink. More information on bacteriological contamination of drinking water wells, along with lists of licensed well drillers, pump installers and labs certified to analyze water samples is available by searching for keyword " wells" on the DNR website.

For individuals who receive their drinking water from a public water supply, these systems are designed and operated to keep out contaminants. Anyone with concerns about the safety of their community's drinking water, contact your public water supplier.

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