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Howard County, Indiana Water Quality Report

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Indiana American Water — Kokomo

2025 report; individual sample dates shown

For Indiana American Water’s Kokomo system (IN5234007). Keep the two plant results separate when reviewing water for a Howard County home.

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

363 / 386ppm

Superior Street / Philips Street levels

Combined sample range: 240–520 ppm, about 14.0–30.4 gpg.

2025View source

Chloramines

Below 4 ppm MRDL

1.44ppm

Highest running annual average

Chlorine is listed separately at 1.10 ppm RAA.

2025View source

TTHMs

Below 80 ppb MCL

56.8ppb

Highest reported locational running annual average

Individual samples: 4.1–86.2 ppb. The 80 ppb limit is applied to the locational running annual average.

2025View source

HAA5

Below 60 ppb MCL

21.2ppb

Highest reported locational running annual average

2025View source

Fluoride

Below 4 ppm MCL

0.54 / 0.57ppm

Superior Street / Philips Street results

2025View source

Lead

Below the report’s 15 ppb action level

2ppb

90th percentile at sampled taps

A utility percentile is not a test at your tap.

2024View source

Copper

Below the report’s 1.3 ppm action level

0.836ppm

90th percentile at sampled taps

A utility percentile is not a test at your tap.

2024View source

Nitrate

Below 10 ppm MCL

3.37ppm

Superior Street result; Philips Street ND

2025View source

Water hardness by provider

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

UtilityHardnessHardness source
363 / 386 ppm plant levels · 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
Hardness363 / 386 ppmSuperior Street / Philips Street levels2025View source ↗Very hardCombined sample range: 240–520 ppm, about 14.0–30.4 gpg.
Chloramines1.44 ppmHighest running annual average2025View source ↗Below 4 ppm MRDLChlorine is listed separately at 1.10 ppm RAA.
TTHMs56.8 ppbHighest reported locational running annual average2025View source ↗Below 80 ppb MCLIndividual samples: 4.1–86.2 ppb. The 80 ppb limit is applied to the locational running annual average.
HAA521.2 ppbHighest reported locational running annual average2025View source ↗Below 60 ppb MCL
Fluoride0.54 / 0.57 ppmSuperior Street / Philips Street results2025View source ↗Below 4 ppm MCL
Lead2 ppb90th percentile at sampled taps2024View source ↗Below the report’s 15 ppb action levelA utility percentile is not a test at your tap.
Copper0.836 ppm90th percentile at sampled taps2024View source ↗Below the report’s 1.3 ppm action levelA utility percentile is not a test at your tap.
Nitrate3.37 ppmSuperior Street result; Philips Street ND2025View source ↗Below 10 ppm MCL
Chlorine1.10 ppmHighest running annual average2025View source ↗Below 4 ppm MRDLIndividual range: 0.38–1.84 ppm.

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. Kokomo uses Wildcat Creek surface water and groundwater from 16 wells.

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More about your local water

What this means for your home

Kokomo’s Superior Street and Philips Street plants have separate hardness and chemical values. Keeping both helps avoid treating a single plant number as a countywide measurement.

The reported TTHM sample range reaches 86.2 ppb, while the highest locational running annual average is 56.8 ppb. Those are different statistics; the report applies its 80 ppb benchmark to the rolling average.

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

A useful local question

Why are two Kokomo hardness numbers shown?

The report lists 363 ppm at Superior Street and 386 ppm at Philips Street. The combined sample range is 240–520 ppm. Confirm your supply and test incoming water before choosing final softener settings.

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.

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