About half of hydraulically fractured wells exist within 2 to 3 kilometers of domestic groundwater systems. The EPA regulations that protect public drinking water systems don't apply to privately owned wells, leaving owners responsible for ensuring their water is safe from contaminants.

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About half of hydraulically fractured wells exist within 2 to 3 kilometers of domestic groundwater systems. The EPA regulations that protect public drinking water systems don't apply to privately owned wells, leaving owners responsible for ensuring their water is safe from contaminants.