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The hardest water cities in America, ranked by verified utility data

  • MyApartmentWaterQuality.com published a ranking of America’s 10 hardest-water cities using data from city utilities.
  • San Jose, California, ranked first at 350 parts per million, followed by Madison, Wisconsin, and Indianapolis, Indiana.
  • Las Vegas, Nevada, and Mesa, Arizona, were tied at 291 parts per million.
  • The U.S. Geological Survey defines the “very hard” category using hardness measured in parts per million.
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The Norfolk Daily NewsThe Norfolk Daily News
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The hardest water cities in America, ranked by verified utility data

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Charleston Gazette-Mail broke the news in Charleston, United States on Wednesday, September 23, 2026.
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