Fracking is the petroleum industry practice of pumping water, sand and chemicals underground to crack open fissures and boost the flow of oil and gas. Last year, the EPA tested samples from two wells specially drilled to check for contaminants and announced that fracking may have caused groundwater pollution.
Some residents requested the EPA testing, saying their well water turned foul after gas drilling picked up in their neighborhood several years ago.
While hydraulic fracturing will not occur in the Winona area, some landowners fear mining of frac sand might cause groundwater problems or problems with their wells.
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