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How do contaminants (bacteria and chemicals) get into my well water?

There are many sources of contamination of groundwater, among the most common are:

  • Naturally occurring minerals, nutrients, and metals (i.e., arsenic, lead, barium, fluoride)
  • Local land use practices (fertilizers, pesticides, livestock, animal feeding operations, and biosolids application)
  • Manufacturing processes
  • Sewer overflows
  • Malfunctioning wastewater treatment systems (for example, nearby septic systems)

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