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Water Hardness Maps

Interactive maps for 55 states, provinces, and territories. Each shows every city we track, color-coded by hardness tier.

🌎 North America — all citiesEvery city on a single map

Alabama4 cities Alaska2 cities Alberta8 cities Arizona10 cities Arkansas1 city British Columbia13 cities California78 cities Colorado8 cities Connecticut3 cities District of Columbia1 city Florida13 cities Georgia1 city Hawaii1 city Idaho5 cities Illinois6 cities Indiana7 cities Iowa5 cities Kansas11 cities Kentucky3 cities Louisiana2 cities Manitoba3 cities Maryland3 cities Massachusetts7 cities Michigan9 cities Minnesota4 cities Missouri5 cities Montana4 cities Nebraska4 cities Nevada6 cities New Brunswick4 cities New Jersey5 cities New York6 cities Newfoundland Labrador2 cities North Carolina7 cities North Dakota2 cities Nova Scotia1 city Ohio6 cities Oklahoma2 cities Ontario119 cities Oregon3 cities Pennsylvania4 cities Quebec14 cities Saskatchewan48 cities South Carolina3 cities South Dakota2 cities Tennessee5 cities Texas27 cities Utah6 cities Vermont2 cities Virginia9 cities Washington10 cities West Virginia2 cities Wisconsin6 cities Wyoming2 cities Yukon15 cities