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Clark County, Indiana Water Quality Report

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Indiana American Water — Southern Indiana

2025 report; individual sample dates shown

For Indiana American Water’s Southern Indiana Operations (IN5210005). The service area and Clark County boundary are not identical.

Your water at a glance

See the amount, the comparison and what it means. “Below” refers to the stated benchmark, not zero risk.

Hardness

Very hard

191ppm

Reported level; approximately 11.2 gpg

Sample range: 159–241 ppm.

2025View source

Chlorine

Below 4 ppm MRDL

1.35ppm

Highest running annual average

Individual range: 0.46–1.95 ppm.

2025View source

TTHMs

Below 80 ppb MCL

72.8ppb

Highest reported locational running annual average

Highest LRAA is below the report’s 80 ppb benchmark; retain this rolling-average basis.

2025View source

HAA5

Below 60 ppb MCL

20ppb

Highest reported locational running annual average

2025View source

Fluoride

Below 4 ppm MCL

0.69ppm

Reported plant result

2024View source

Lead

Not detected

NDppb

90th percentile at sampled taps

2024 sampling: 0 of 30 sites above the report’s action level. ND is not zero.

2024View source

Nitrate

Below 10 ppm MCL

0.25ppm

Reported plant result

2025View source

PFOA

Below report’s 4 ppt benchmark

3.4ppt

Highest reported result

Dated plant result; do not treat it as a home measurement.

2025View source

Water hardness by provider

The figures below are provider-specific. They are not a countywide average.

UtilityHardnessHardness source
191 ppm reported level · very hard2025
View Full Water ReportOpen the measured results, dates, comparisons and original utility report.

The numbers behind your report

Selected results with the original sampling dates and measurement basis. Open the utility report for every parameter, notice and footnote.

Open the complete utility report ↗

What was measuredReported amountSample year / source dateHow to read it
Hardness191 ppmReported level; approximately 11.2 gpg2025View source ↗Very hardSample range: 159–241 ppm.
Chlorine1.35 ppmHighest running annual average2025View source ↗Below 4 ppm MRDLIndividual range: 0.46–1.95 ppm.
TTHMs72.8 ppbHighest reported locational running annual average2025View source ↗Below 80 ppb MCLHighest LRAA is below the report’s 80 ppb benchmark; retain this rolling-average basis.
HAA520 ppbHighest reported locational running annual average2025View source ↗Below 60 ppb MCL
Fluoride0.69 ppmReported plant result2024View source ↗Below 4 ppm MCL
LeadND ppb90th percentile at sampled taps2024View source ↗Not detected2024 sampling: 0 of 30 sites above the report’s action level. ND is not zero.
Nitrate0.25 ppmReported plant result2025View source ↗Below 10 ppm MCL
PFOA3.4 pptHighest reported result2025View source ↗Below report’s 4 ppt benchmarkDated plant result; do not treat it as a home measurement.
Copper0.026 ppm90th percentile at sampled taps2024View source ↗Below the report’s 1.3 ppm action levelA utility percentile is not a test at your tap.
PFOS3.3 pptHighest reported result2025View source ↗Below report’s 4 ppt benchmark
PFBS2.1 pptHighest reported result2025View source ↗Detection reportedNo individual maximum contaminant level is listed for PFBS in this report.

In drinking water, ppm ≈ mg/L, ppb ≈ µg/L and ppt ≈ ng/L. Calculated hardness in grains per US gallon (gpg) = mg/L as CaCO₃ ÷ 17.118, rounded to one decimal. ND means below the reporting limit, not zero.

MCL is an enforceable contaminant limit; MRDL is a disinfectant limit. A secondary guideline concerns aesthetics. TTHM/HAA5 compliance uses locational running annual averages; read the utility’s notices as well as individual results.

PFAS results are compound-specific. Source monitoring, entry-point samples and tap tests are different. A detected result does not identify every PFAS compound or establish the level at your home. Read the original report for context and current utility notices. EPA PFAS benchmarks and implementation ↗

Hardness source ↗USGS hardness classification ↗

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Source water. Southern Indiana Operations uses groundwater from 17 wells in two wellfields.

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More about your local water

What this means for your home

This guide follows the Southern Indiana Operations system rather than assuming the Clark County line is a utility boundary. Select the provider shown on your bill.

The reported hardness supports planning for scale control. TTHMs and individual PFAS compounds are separate treatment considerations, with different measurement bases and performance requirements.

Filter vs. softener: what each doesPlan installation with your plumber

A useful local question

Does the Clark County report cover every local supplier?

No. It summarizes Indiana American Water’s Southern Indiana Operations. A different utility or private well needs its own report or test, even when the address is in the same county.

Sources and methodology

We keep each utility’s results separate, show the reported sample year, and distinguish averages, maxima and tap-sampling percentiles. Hardness classifications use USGS ranges. Missing data stays unknown.

Official utility reports

Confirm the exact system on your water bill. Choose Other / not sure when your supplier is not summarized here.

Sources reviewed November 12, 2026. Individual sampling dates are shown with each result.

Your water → your home → your system

Turn your report into a plan for your home.

Choose the system size, keep useful existing equipment, and review your filtration goals.

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