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Arsenic levels in Oregon waters

J C Stoner, P D Whanger, P H Weswig

    Environmental Health Perspectives
    |August 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    High arsenic levels in Oregon well water, up to 2,000 ppb, are linked to volcanic deposits and deeper wells. This contamination poses potential health risks to residents due to elevated arsenic blood levels.

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    Area of Science:

    • Environmental Science
    • Geochemistry
    • Public Health

    Background:

    • Arsenic contamination in drinking water poses significant health risks.
    • The U.S. Public Health Service Drinking Water Standard (1962) sets a limit of 50 ppb for arsenic.
    • Elevated arsenic levels in Oregon well water exceed this standard significantly.

    Observation:

    • Arsenic concentrations in Oregon well water can be 30-40 times the 1962 standard.
    • Geological surveys indicate volcanic deposits, specifically the Fischer formation in Lane County, are a likely source.
    • Deeper wells generally exhibit higher arsenic concentrations.

    Findings:

    • Arsenic levels in well water ranged from undetectable to 2,000 ppb.
    • High-arsenic waters are characterized by low calcium and magnesium, high sodium, high boron, and high pH.

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  • Arsenic levels in hot springs in other Oregon areas reached up to 900 ppb.
  • Arsenic blood levels in residents correlated with local water arsenic content, ranging from 32 ppb to 250 ppb.

    • Implications:

    • The findings highlight a critical environmental health issue in Oregon.
    • Understanding the geological source is crucial for developing mitigation strategies.
    • Further research is needed to fully assess the long-term health impacts of chronic arsenic exposure from drinking water.