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  Savings vary by region depending on the availability of water and the proximity and number of disposal wells. A recent report by Jefferies estimated that oil and gas companies can save $370,000 per well in the Marcellus shale play in Pennsylvania and $70,000 in North Dakota's Bakken region. In Texas' Eagle Ford shale play, the cost of recycling would be about the same as using freshwater because disposal wells are abundant there.