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.
You are in the band where tap-water cleaning leaves a visible film within minutes of drying. Wash with tap (the surfactant holds the minerals in suspension), but rinse with distilled. This is the single change that fixes 90% of "I cleaned it and it still looks bad" complaints in your region.