Indiana has 9 tracked water utilities serving approximately 2.2M residents. The average water hardness is 278 ppm (16.3 GPG), classified as Very Hard — above the national average of 100 ppm. Hardness ranges from 130.5 ppm in Jeffersonville to 377 ppm in Bloomington.

In the past 3 years, 4 of 9 cities in Indiana have recorded water quality violations, totaling 55 violations (28 health-based). All 9 tested cities have lead levels below the EPA action level of 15 ppb.

With very hard water on average, many Indiana residents may notice mineral buildup on fixtures, dry skin, or stiff-feeling hair. A shower filter for hard water can help reduce chlorine exposure, while a water softener addresses the mineral buildup directly.

Frequently Asked Questions About Indiana Water

Is tap water safe to drink in Indiana?

Most tap water in Indiana meets EPA standards, but 4 cities have recorded violations in the past 3 years (28 health-based). We recommend checking your specific city's report on TapWater.org and considering a home water test.

How hard is the water in Indiana?

Indiana's average water hardness is 278 ppm (16.3 GPG), classified as Very Hard. This is above the national average of 100 ppm. Hardness varies significantly by city — use our Water Hardness Calculator to check your specific area.

Which city in Indiana has the cleanest tap water?

Based on EPA violation data, lead testing, and water quality metrics, Indianapolis ranks as having the cleanest tap water in Indiana. It has zero violations in the past 3 years and lead levels well below the EPA action level.

Which city in Indiana has the most water quality issues?

Bloomington currently has the most water quality concerns in Indiana, with 38 violations in the past 3 years. Residents should check their city's detailed water quality report and consider using a certified water filter.

Where does Indiana get its water from?

The majority of Indiana's water systems (44%) use surface water as their primary source. Surface water comes from rivers, lakes, and reservoirs. Each city's specific source can vary — check individual city reports for details.