Dayton, OH water hardness

Dayton's tap water measures 155 ppm, which is hard. The number comes from City of Dayton Department of Water's 2025 published data, measured at the tap.

Score

155 ppm

Hard

Dayton shower water

Hardness bands per the U.S. Geological Survey.

155

Soft
0–60

Moderately hard
61–120

Hard
121–180

Very hard
181+

Source: City of Dayton Department of Water, 2025.

City of Dayton Department of Water softens this water at the plant with lime treatment before it reaches you. The number above is what arrives at your tap, not what the source water measures.

Elsewhere in Ohio, Cincinnati tests at 142 ppm and Beavercreek at 137 ppm.

What this means

What Dayton Water Means for Hair and Skin

Between 121 and 180 ppm, buildup shows up over weeks rather than days: spotted glass, crusted showerheads, and shampoo that never quite rinses clean.

What removes it

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Real ion-exchange softening (the whole-house technology, sized for a shower) installs in about ten minutes without a plumber, and comes down just as fast when you move.

Water tests soft on a standard hardness strip

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