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Water Quality

Common Contaminants in Washington Water

November 1, 2025
Common Contaminants in Washington Water

Understanding Washington's Water Quality

Washington state's water supply can contain various contaminants depending on your location and water source. Understanding these contaminants is the first step in protecting your family's health.

Common Contaminants Found in Washington Water:

  • Chlorine: Used for disinfection, can affect taste and odor
  • Lead: Can leach from old pipes and fixtures
  • Nitrates: Common in agricultural areas
  • Arsenic: Naturally occurring in some regions
  • Hard Minerals: Calcium and magnesium causing scale buildup
  • Sediment: Dirt, rust, and other particles

Health Impacts:

While most public water systems meet federal standards, certain contaminants can still pose health risks, especially for vulnerable populations like children, pregnant women, and the elderly.

What You Can Do:

  • Get your water tested annually
  • Install appropriate filtration systems
  • Consider whole-house filtration for complete protection
  • Replace old pipes and fixtures that may contain lead
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