Water softeners, commonly used in rural areas, add sodium to the water, which can contribute to high blood pressure.
How Much Sodium Does a Water Softener Add? - Robert B. Hill Co.
What Is Hard Water? - Longs Ecowater
Environmental exposure to metals and the risk of hypertension: A cross-sectional study in China
Environmental exposure to metals and the risk of hypertension: A cross-sectional study in China
Is a Water Softener a Good Investment? Weigh the Hard Facts
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Salt Free Water Softener Canada
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How Does a Water Softener Work? (And What Do They Do) - Filtersmart
Water Softener Systems - Water Softeners - The Home Depot
Softened Water vs Hard Water for Health – Life Ionizers