Enter your ZIP code. We pull regional water hardness data and tell you exactly what you're dealing with — and whether you can keep cleaning with tap water or need to switch to distilled.
US ZIP codes only. For the 271 covered cities: the utility's own published figure, as on the national rankings. Elsewhere: a planning estimate, labelled as one.
Your tap water is soft enough that you can wash and rinse with it directly. No distilled water needed for normal residential cleaning. Spend the savings on a better squeegee.