Indianapolis, IN water hardness

Indianapolis's tap water measures 317 ppm, which is very hard. The number comes from Citizens Energy Group's 2025 published data, measured at the tap.

Score

317 ppm

Very hard

Indianapolis shower water

Hardness bands per the U.S. Geological Survey. Range: 148 to 460 ppm across service areas.

317

Soft
0–60

Moderately hard
61–120

Hard
121–180

Very hard
181+

Source: Citizens Energy Group, 2025.

For comparison, San Antonio, TX sits in the same range at 299 ppm.

What this means

What Indianapolis Water Means for Hair and Skin

Above 180 ppm, minerals leave visible scale on fixtures, soap struggles to lather, and hair and skin carry a film that rinsing doesn't remove. This is the range where people notice hard water without being told.

What removes it

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Water tests soft on a standard hardness strip

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