• Groundwater pollutants are the same as surface water pollutants: municipal, agricultural, and industrial.
  • Groundwater is susceptible to pollutants that infiltrate into the ground from underground storage tanks or agricultural fields.
  • About 25% of the usable groundwater and 45% of municipal groundwater supplies in the United States are polluted.
  • Rock and soil filters some pollutants as water travels down to and through an aquifer.
  • A plume containing pollutants travels outward from the source and through the aquifer in the direction the water is moving.
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