Water problems · well water

Tannins: yellow-brown tint and earthy smells in well water

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The short answer

Tannins are organic material suspended in well water, and a natural issue for wells. They cause a yellow/brown tint, musty odor and taste, earthy smells and staining. A dedicated tannin resin captures them, after a water test confirms tannins are the problem.

What you notice

Signs to look for

  • Yellow or brown tint
  • Earthy smells and a musty taste
  • Staining

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