If an operator properly constructs a well in accordance with state and federal regulations and have strict procedures on the handling of fluids at the surface, there shouldn’t be an impact on the water supply. That said, every Marcellus Shale producers is requires by law to have a spill response plan in the event an accident occurs. These detailed plans, which are approved by the Pa. Department of Environmental Protection and required to be on-site in the event of an incident, outline the steps an operator will take in the event a spill reaches surface waters.
As for wildlife, it’s not uncommon to see deer and other wildlife grazing along a pipeline right of way or outside the fence of a well pad. Operators are required to construct fencing around impoundments and well pads to prevent wildlife from entering active areas. Once a well is put into production, the location is reclaimed, often with native grasses to attract habitat back to the area.