OREGON STATE UNIVERSITY

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Contamination from Natural Sources

Stream Infiltration

Stream infiltration

Contamination Evidence:
  • Odors in well water.
  • Other changes in well water quality.
  • Detection of excessive bacteria or chemicals in well water tests.
Causes:
  • Polluted stream or lake water enters well.
Prevention:
  • Locate well away from stream or lake.
  • Test well water regularly for potential contaminants.
  • Change to public water supply if feasible.



Natural Substances

Natural substances

Contamination Evidence:
  • Bad taste or odor in well water.
  • Stains on water fixtures.
  • Detection of unacceptable levels of substances in well water tests.
Causes:
  • Natural soil or rock conditions.
Prevention:
  • Avoid areas where natural groundwater problems exist, if feasible.
  • Use water treatment devices.
  • Change to public water supply, if feasible.