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From that link [1 above]: "An overwhelming 85 percent of the USA has hard water, so the likelihood that you live in state or city with hard water is high." For
by someweirdperson 4y ago
From that link [1 above]: "An overwhelming 85 percent of the USA has hard water, so the likelihood that you live in state or city with hard water is high."
For a random location. Comparing the water hardness map with a population density map it seems that most are living in areas with soft water.